Class: GraphQL::Schema

Inherits:
Object
  • Object
show all
Extended by:
Autoload, FindInheritedValue, Member::HasAstNode
Defined in:
lib/graphql/schema.rb,
lib/graphql/schema/enum.rb,
lib/graphql/schema/list.rb,
lib/graphql/schema/field.rb,
lib/graphql/schema/union.rb,
lib/graphql/schema/finder.rb,
lib/graphql/schema/loader.rb,
lib/graphql/schema/member.rb,
lib/graphql/schema/object.rb,
lib/graphql/schema/scalar.rb,
lib/graphql/schema/warden.rb,
lib/graphql/schema/printer.rb,
lib/graphql/schema/timeout.rb,
lib/graphql/schema/wrapper.rb,
lib/graphql/schema/addition.rb,
lib/graphql/schema/argument.rb,
lib/graphql/schema/mutation.rb,
lib/graphql/schema/non_null.rb,
lib/graphql/schema/resolver.rb,
lib/graphql/schema/directive.rb,
lib/graphql/schema/interface.rb,
lib/graphql/schema/null_mask.rb,
lib/graphql/schema/validator.rb,
lib/graphql/schema/enum_value.rb,
lib/graphql/schema/visibility.rb,
lib/graphql/schema/input_object.rb,
lib/graphql/schema/subscription.rb,
lib/graphql/schema/member/scoped.rb,
lib/graphql/schema/always_visible.rb,
lib/graphql/schema/built_in_types.rb,
lib/graphql/schema/directive/skip.rb,
lib/graphql/schema/base_64_encoder.rb,
lib/graphql/schema/field_extension.rb,
lib/graphql/schema/late_bound_type.rb,
lib/graphql/schema/member/has_path.rb,
lib/graphql/schema/type_expression.rb,
lib/graphql/schema/type_membership.rb,
lib/graphql/schema/directive/one_of.rb,
lib/graphql/schema/visibility/visit.rb,
lib/graphql/schema/directive/feature.rb,
lib/graphql/schema/directive/flagged.rb,
lib/graphql/schema/directive/include.rb,
lib/graphql/schema/member/build_type.rb,
lib/graphql/schema/member/has_fields.rb,
lib/graphql/schema/unique_within_type.rb,
lib/graphql/schema/visibility/profile.rb,
lib/graphql/schema/directive/transform.rb,
lib/graphql/schema/member/has_ast_node.rb,
lib/graphql/schema/directive/deprecated.rb,
lib/graphql/schema/find_inherited_value.rb,
lib/graphql/schema/introspection_system.rb,
lib/graphql/schema/member/has_arguments.rb,
lib/graphql/schema/visibility/migration.rb,
lib/graphql/schema/build_from_definition.rb,
lib/graphql/schema/field/scope_extension.rb,
lib/graphql/schema/member/has_directives.rb,
lib/graphql/schema/member/has_interfaces.rb,
lib/graphql/schema/member/has_validators.rb,
lib/graphql/schema/directive/specified_by.rb,
lib/graphql/schema/member/relay_shortcuts.rb,
lib/graphql/schema/member/validates_input.rb,
lib/graphql/schema/relay_classic_mutation.rb,
lib/graphql/schema/member/base_dsl_methods.rb,
lib/graphql/schema/validator/all_validator.rb,
lib/graphql/schema/has_single_input_argument.rb,
lib/graphql/schema/member/graphql_type_names.rb,
lib/graphql/schema/resolver/has_payload_type.rb,
lib/graphql/schema/field/connection_extension.rb,
lib/graphql/schema/member/type_system_helpers.rb,
lib/graphql/schema/validator/format_validator.rb,
lib/graphql/schema/validator/length_validator.rb,
lib/graphql/schema/validator/required_validator.rb,
lib/graphql/schema/member/has_deprecation_reason.rb,
lib/graphql/schema/validator/exclusion_validator.rb,
lib/graphql/schema/validator/inclusion_validator.rb,
lib/graphql/schema/validator/allow_null_validator.rb,
lib/graphql/schema/validator/allow_blank_validator.rb,
lib/graphql/schema/member/has_unresolved_type_error.rb,
lib/graphql/schema/validator/numericality_validator.rb,
lib/graphql/schema/build_from_definition/resolve_map.rb,
lib/graphql/schema/build_from_definition/resolve_map/default_resolve.rb

Overview

A GraphQL schema which may be queried with Query.

The Schema contains:

  • types for exposing your application
  • query analyzers for assessing incoming queries (including max depth & max complexity restrictions)
  • execution strategies for running incoming queries

Schemas start with root types, Schema.query, Schema.mutation and Schema.subscription. The schema will traverse the tree of fields & types, using those as starting points. Any undiscoverable types may be provided with the types configuration.

Schemas can restrict large incoming queries with max_depth and max_complexity configurations. (These configurations can be overridden by specific calls to Schema.execute)

Examples:

defining a schema

class MySchema < GraphQL::Schema
  query QueryType
  # If types are only connected by way of interfaces, they must be added here
  orphan_types ImageType, AudioType
end

Direct Known Subclasses

Query::NullContext::NullSchema

Defined Under Namespace

Modules: AlwaysVisible, Base64Encoder, BuildFromDefinition, DefaultTraceClass, FindInheritedValue, HasSingleInputArgument, Interface, Loader, NullMask, ResolveTypeWithType, SubclassGetReferencesTo, TypeExpression, UniqueWithinType Classes: Addition, Argument, Directive, DuplicateNamesError, Enum, EnumValue, Field, FieldExtension, Finder, InputObject, IntrospectionSystem, InvalidDocumentError, LateBoundType, List, Member, Mutation, NonNull, Object, Printer, RelayClassicMutation, Resolver, Scalar, Subscription, Timeout, TypeMembership, Union, UnresolvedLateBoundTypeError, Validator, Visibility, Warden, Wrapper

Constant Summary collapse

NEW_HANDLER_HASH = 
->(h, k) {
  h[k] = {
    class: k,
    handler: nil,
    subclass_handlers: Hash.new(&NEW_HANDLER_HASH),
   }
}
BUILT_IN_TYPES = 
{
  "Int" => GraphQL::Types::Int,
  "String" => GraphQL::Types::String,
  "Float" => GraphQL::Types::Float,
  "Boolean" => GraphQL::Types::Boolean,
  "ID" => GraphQL::Types::ID,
}

Class Attribute Summary collapse

Attributes included from Member::HasAstNode

#ast_node

Class Method Summary collapse

Methods included from Member::HasAstNode

inherited

Methods included from Autoload

autoload, eager_load!

Class Attribute Details

.analysis_engine ⇒ Object 



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# File 'lib/graphql/schema.rb', line 902

def analysis_engine
  @analysis_engine || find_inherited_value(:analysis_engine, self.default_analysis_engine)
end

.connections ⇒ GraphQL::Pagination::Connections

Returns if installed.

Returns:



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# File 'lib/graphql/schema.rb', line 422

def connections
  if defined?(@connections)
    @connections
  else
    inherited_connections = find_inherited_value(:connections, nil)
    # This schema is part of an inheritance chain which is using new connections,
    # make a new instance, so we don't pollute the upstream one.
    if inherited_connections
      @connections = Pagination::Connections.new(schema: self)
    else
      nil
    end
  end
end

.dataloader_class ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

See Also:



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# File 'lib/graphql/schema.rb', line 678

def dataloader_class
  @dataloader_class || GraphQL::Dataloader::NullDataloader
end

.error_bubbling(new_error_bubbling = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 906

def error_bubbling(new_error_bubbling = nil)
  if !new_error_bubbling.nil?
    warn("error_bubbling(#{new_error_bubbling.inspect}) is deprecated; the default value of `false` will be the only option in GraphQL-Ruby 3.0")
    @error_bubbling = new_error_bubbling
  else
    @error_bubbling.nil? ? find_inherited_value(:error_bubbling) : @error_bubbling
  end
end

.max_complexity(max_complexity = nil, count_introspection_fields: true) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 881

def max_complexity(max_complexity = nil, count_introspection_fields: true)
  if max_complexity
    @max_complexity = max_complexity
    @max_complexity_count_introspection_fields = count_introspection_fields
  elsif defined?(@max_complexity)
    @max_complexity
  else
    find_inherited_value(:max_complexity)
  end
end

.max_depth(new_max_depth = nil, count_introspection_fields: true) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 919

def max_depth(new_max_depth = nil, count_introspection_fields: true)
  if new_max_depth
    @max_depth = new_max_depth
    @count_introspection_fields = count_introspection_fields
  elsif defined?(@max_depth)
    @max_depth
  else
    find_inherited_value(:max_depth)
  end
end

.use_visibility_profile=(value) ⇒ Object (writeonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema.rb', line 606

def use_visibility_profile=(value)
  @use_visibility_profile = value
end

.validate_max_errors(new_validate_max_errors = NOT_CONFIGURED) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 871

def validate_max_errors(new_validate_max_errors = NOT_CONFIGURED)
  if NOT_CONFIGURED.equal?(new_validate_max_errors)
    defined?(@validate_max_errors) ? @validate_max_errors : find_inherited_value(:validate_max_errors)
  else
    @validate_max_errors = new_validate_max_errors
  end
end

.validate_timeout(new_validate_timeout = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 833

def validate_timeout(new_validate_timeout = nil)
  if new_validate_timeout
    @validate_timeout = new_validate_timeout
  elsif defined?(@validate_timeout)
    @validate_timeout
  else
    find_inherited_value(:validate_timeout)
  end
end

.visibility ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema.rb', line 608

def visibility
  @visibility
end

.visibility_profile_class ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema.rb', line 595

def visibility_profile_class
  if defined?(@visibility_profile_class)
    @visibility_profile_class
  elsif superclass.respond_to?(:visibility_profile_class)
    superclass.visibility_profile_class
  else
    GraphQL::Schema::Visibility::Profile
  end
end

.warden_class ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema.rb', line 581

def warden_class
  if defined?(@warden_class)
    @warden_class
  elsif superclass.respond_to?(:warden_class)
    superclass.warden_class
  else
    GraphQL::Schema::Warden
  end
end

Class Method Details

.add_subscription_extension_if_necessary ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema.rb', line 1556

def add_subscription_extension_if_necessary
  # TODO: when there's a proper API for extending root types, migrat this to use it.
  if !defined?(@subscription_extension_added) && @subscription_object.is_a?(Class) && self.subscriptions
    @subscription_extension_added = true
    subscription.all_field_definitions.each do |field|
      if !field.extensions.any? { |ext| ext.is_a?(Subscriptions::DefaultSubscriptionResolveExtension) }
        field.extension(Subscriptions::DefaultSubscriptionResolveExtension)
      end
    end
  end
end

.after_any_lazies(maybe_lazies) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return a lazy if any of maybe_lazies are lazy, otherwise, call the block eagerly and return the result.

Parameters:

  • maybe_lazies (Array) 


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# File 'lib/graphql/schema.rb', line 1621

def after_any_lazies(maybe_lazies)
  if maybe_lazies.any? { |l| lazy?(l) }
    GraphQL::Execution::Lazy.all(maybe_lazies).then do |result|
      yield result
    end
  else
    yield maybe_lazies
  end
end

.after_lazy(value, &block) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Call the given block at the right time, either:

  • Right away, if value is not registered with lazy_resolve
  • After resolving value, if it's registered with lazy_resolve (eg, Promise)


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# File 'lib/graphql/schema.rb', line 1581

def after_lazy(value, &block)
  if lazy?(value)
    GraphQL::Execution::Lazy.new do
      result = sync_lazy(value)
      # The returned result might also be lazy, so check it, too
      after_lazy(result, &block)
    end
  else
    yield(value) if block_given?
  end
end

.as_json(context: {}, include_deprecated_args: true, include_schema_description: false, include_is_repeatable: false, include_specified_by_url: false, include_is_one_of: false) ⇒ Hash

Return the Hash response of Introspection::INTROSPECTION_QUERY.

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>)
  • except (<#call(member, ctx)>)
  • include_deprecated_args (Boolean) (defaults to: true) —

    If true, deprecated arguments will be included in the JSON response

  • include_schema_description (Boolean) (defaults to: false) —

    If true, the schema's description will be queried and included in the response

  • include_is_repeatable (Boolean) (defaults to: false) —

    If true, isRepeatable: true|false will be included with the schema's directives

  • include_specified_by_url (Boolean) (defaults to: false) —

    If true, scalar types' specifiedByUrl: will be included in the response

  • include_is_one_of (Boolean) (defaults to: false) —

    If true, isOneOf: true|false will be included with input objects

Returns:

  • (Hash) —

    GraphQL result



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# File 'lib/graphql/schema.rb', line 275

def as_json(context: {}, include_deprecated_args: true, include_schema_description: false, include_is_repeatable: false, include_specified_by_url: false, include_is_one_of: false)
  introspection_query = Introspection.query(
    include_deprecated_args: include_deprecated_args,
    include_schema_description: include_schema_description,
    include_is_repeatable: include_is_repeatable,
    include_is_one_of: include_is_one_of,
    include_specified_by_url: include_specified_by_url,
  )

  execute(introspection_query, context: context).to_h
end

.build_trace_mode(mode) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 211

def build_trace_mode(mode)
  case mode
  when :default
    # Use the superclass's default mode if it has one, or else start an inheritance chain at the built-in base class.
    base_class = (superclass.respond_to?(:trace_class_for) && superclass.trace_class_for(mode, build: true)) || GraphQL::Tracing::Trace
    const_set(:DefaultTrace, Class.new(base_class) do
      include DefaultTraceClass
    end)
  when :default_backtrace
    schema_base_class = trace_class_for(:default, build: true)
    const_set(:DefaultTraceBacktrace, Class.new(schema_base_class) do
      include(GraphQL::Backtrace::Trace)
    end)
  else
    # First, see if the superclass has a custom-defined class for this.
    # Then, if it doesn't, use this class's default trace
    base_class = (superclass.respond_to?(:trace_class_for) && superclass.trace_class_for(mode)) || trace_class_for(:default, build: true)
    # Prepare the default trace class if it hasn't been initialized yet
    base_class ||= (own_trace_modes[:default] = build_trace_mode(:default))
    mods = trace_modules_for(mode)
    if base_class < DefaultTraceClass
      mods = trace_modules_for(:default) + mods
    end
    # Copy the existing default options into this mode's options
    default_options = trace_options_for(:default)
    add_trace_options_for(mode, default_options)

    Class.new(base_class) do
      !mods.empty? && include(*mods)
    end
  end
end

.context_class(new_context_class = nil) ⇒ Object

Parameters:

  • new_context_class (Class<GraphQL::Query::Context>) (defaults to: nil) —

    A subclass to use when executing queries



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# File 'lib/graphql/schema.rb', line 1077

def context_class(new_context_class = nil)
  if new_context_class
    @context_class = new_context_class
  else
    @context_class || find_inherited_value(:context_class, GraphQL::Query::Context)
  end
end

.count_introspection_fields ⇒ Object 



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# File 'lib/graphql/schema.rb', line 930

def count_introspection_fields
  if defined?(@count_introspection_fields)
    @count_introspection_fields
  else
    find_inherited_value(:count_introspection_fields, true)
  end
end

.cursor_encoder(new_encoder = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 761

def cursor_encoder(new_encoder = nil)
  if new_encoder
    @cursor_encoder = new_encoder
  end
  @cursor_encoder || find_inherited_value(:cursor_encoder, Base64Encoder)
end

.default_analysis_engine ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1046

def default_analysis_engine
  if superclass <= GraphQL::Schema
    superclass.default_analysis_engine
  else
    @default_analysis_engine ||= GraphQL::Analysis::AST
  end
end

.default_directives ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1361

def default_directives
  @default_directives ||= {
    "include" => GraphQL::Schema::Directive::Include,
    "skip" => GraphQL::Schema::Directive::Skip,
    "deprecated" => GraphQL::Schema::Directive::Deprecated,
    "oneOf" => GraphQL::Schema::Directive::OneOf,
    "specifiedBy" => GraphQL::Schema::Directive::SpecifiedBy,
  }.freeze
end

.default_execution_strategy ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1038

def default_execution_strategy
  if superclass <= GraphQL::Schema
    superclass.default_execution_strategy
  else
    @default_execution_strategy ||= GraphQL::Execution::Interpreter
  end
end

.default_logger(new_default_logger = NOT_CONFIGURED) ⇒ Object

Parameters:

  • new_default_logger (#log) (defaults to: NOT_CONFIGURED) —

    Something to use for logging messages



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# File 'lib/graphql/schema.rb', line 1056

def default_logger(new_default_logger = NOT_CONFIGURED)
  if NOT_CONFIGURED.equal?(new_default_logger)
    if defined?(@default_logger)
      @default_logger
    elsif superclass.respond_to?(:default_logger)
      superclass.default_logger
    elsif defined?(Rails) && Rails.respond_to?(:logger) && (rails_logger = Rails.logger)
      rails_logger
    else
      def_logger = Logger.new($stdout)
      def_logger.info! # It doesn't output debug info by default
      def_logger
    end
  elsif new_default_logger == nil
    @default_logger = Logger.new(IO::NULL)
  else
    @default_logger = new_default_logger
  end
end

.default_max_page_size(new_default_max_page_size = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 768

def default_max_page_size(new_default_max_page_size = nil)
  if new_default_max_page_size
    @default_max_page_size = new_default_max_page_size
  else
    @default_max_page_size || find_inherited_value(:default_max_page_size)
  end
end

.default_page_size(new_default_page_size = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 787

def default_page_size(new_default_page_size = nil)
  if new_default_page_size
    @default_page_size = new_default_page_size
  else
    @default_page_size || find_inherited_value(:default_page_size)
  end
end

.default_trace_mode(new_mode = nil) ⇒ Object

Parameters:

  • new_mode (Symbol) (defaults to: nil) —

    If configured, this will be used when context: { trace_mode: ... } isn't set.



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# File 'lib/graphql/schema.rb', line 150

def default_trace_mode(new_mode = nil)
  if new_mode
    @default_trace_mode = new_mode
  elsif defined?(@default_trace_mode)
    @default_trace_mode
  elsif superclass.respond_to?(:default_trace_mode)
    superclass.default_trace_mode
  else
    :default
  end
end

.deprecated_graphql_definition ⇒ Object 



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# File 'lib/graphql/schema.rb', line 136

def deprecated_graphql_definition
  graphql_definition(silence_deprecation_warning: true)
end

.description(new_description = nil) ⇒ String?

Returns:

  • (String, nil) 


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# File 'lib/graphql/schema.rb', line 301

def description(new_description = nil)
  if new_description
    @description = new_description
  elsif defined?(@description)
    @description
  else
    find_inherited_value(:description, nil)
  end
end

.did_you_mean(new_dym = NOT_CONFIGURED) ⇒ Object

Returns DidYouMean if it's defined. Override this to return nil if you don't want to use DidYouMean



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# File 'lib/graphql/schema.rb', line 1633

def did_you_mean(new_dym = NOT_CONFIGURED)
  if NOT_CONFIGURED.equal?(new_dym)
    if defined?(@did_you_mean)
      @did_you_mean
    else
      find_inherited_value(:did_you_mean, defined?(DidYouMean) ? DidYouMean : nil)
    end
  else
    @did_you_mean = new_dym
  end
end

.directive(new_directive) ⇒ Object

Attach a single directive to this schema

Parameters:

  • new_directive (Class)

Returns:

  • void



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# File 'lib/graphql/schema.rb', line 1353

def directive(new_directive)
  if use_visibility_profile?
    own_directives[new_directive.graphql_name] = new_directive
  else
    add_type_and_traverse(new_directive, root: false)
  end
end

.directives(*new_directives) ⇒ Object

Add several directives at once

Parameters:

  • new_directives (Class) 


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# File 'lib/graphql/schema.rb', line 1337

def directives(*new_directives)
  if !new_directives.empty?
    new_directives.flatten.each { |d| directive(d) }
  end

  inherited_dirs = find_inherited_value(:directives, default_directives)
  if !own_directives.empty?
    inherited_dirs.merge(own_directives)
  else
    inherited_dirs
  end
end

.disable_introspection_entry_points ⇒ Object 



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# File 'lib/graphql/schema.rb', line 938

def disable_introspection_entry_points
  @disable_introspection_entry_points = true
  # TODO: this clears the cache made in `def types`. But this is not a great solution.
  @introspection_system = nil
end

.disable_introspection_entry_points? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 956

def disable_introspection_entry_points?
  if instance_variable_defined?(:@disable_introspection_entry_points)
    @disable_introspection_entry_points
  else
    find_inherited_value(:disable_introspection_entry_points?, false)
  end
end

.disable_schema_introspection_entry_point ⇒ Object 



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# File 'lib/graphql/schema.rb', line 944

def disable_schema_introspection_entry_point
  @disable_schema_introspection_entry_point = true
  # TODO: this clears the cache made in `def types`. But this is not a great solution.
  @introspection_system = nil
end

.disable_schema_introspection_entry_point? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 964

def disable_schema_introspection_entry_point?
  if instance_variable_defined?(:@disable_schema_introspection_entry_point)
    @disable_schema_introspection_entry_point
  else
    find_inherited_value(:disable_schema_introspection_entry_point?, false)
  end
end

.disable_type_introspection_entry_point ⇒ Object 



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# File 'lib/graphql/schema.rb', line 950

def disable_type_introspection_entry_point
  @disable_type_introspection_entry_point = true
  # TODO: this clears the cache made in `def types`. But this is not a great solution.
  @introspection_system = nil
end

.disable_type_introspection_entry_point? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 972

def disable_type_introspection_entry_point?
  if instance_variable_defined?(:@disable_type_introspection_entry_point)
    @disable_type_introspection_entry_point
  else
    find_inherited_value(:disable_type_introspection_entry_point?, false)
  end
end

.error_handlers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1113

def error_handlers
  @error_handlers ||= {
    class: nil,
    handler: nil,
    subclass_handlers: Hash.new(&NEW_HANDLER_HASH),
  }
end

.execute(query_str = nil, **kwargs) ⇒ GraphQL::Query::Result

Execute a query on itself.

Returns:

See Also:

  • for arguments.


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# File 'lib/graphql/schema.rb', line 1504

def execute(query_str = nil, **kwargs)
  if query_str
    kwargs[:query] = query_str
  end
  # Some of the query context _should_ be passed to the multiplex, too
  multiplex_context = if (ctx = kwargs[:context])
    {
      backtrace: ctx[:backtrace],
      tracers: ctx[:tracers],
      trace: ctx[:trace],
      dataloader: ctx[:dataloader],
      trace_mode: ctx[:trace_mode],
    }
  else
    {}
  end
  # Since we're running one query, don't run a multiplex-level complexity analyzer
  all_results = multiplex([kwargs], max_complexity: nil, context: multiplex_context)
  all_results[0]
end

.extra_types(*new_extra_types) ⇒ Array<Module>

Returns Type definitions added to this schema.

Parameters:

  • new_extra_types (Module) —

    Type definitions to include in printing and introspection, even though they aren't referenced in the schema

Returns:

  • (Array<Module>) —

    Type definitions added to this schema



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# File 'lib/graphql/schema.rb', line 982

def extra_types(*new_extra_types)
  if !new_extra_types.empty?
    new_extra_types = new_extra_types.flatten
    @own_extra_types ||= []
    @own_extra_types.concat(new_extra_types)
  end
  inherited_et = find_inherited_value(:extra_types, nil)
  if inherited_et
    if @own_extra_types
      inherited_et + @own_extra_types
    else
      inherited_et
    end
  else
    @own_extra_types || EMPTY_ARRAY
  end
end

.find(path) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 311

def find(path)
  if !@finder
    @find_cache = {}
    @finder ||= GraphQL::Schema::Finder.new(self)
  end
  @find_cache[path] ||= @finder.find(path)
end

.from_definition(definition_or_path, default_resolve: nil, parser: GraphQL.default_parser, using: {}) ⇒ Class

Create schema from an IDL schema or file containing an IDL definition.

Parameters:

  • definition_or_path (String) —

    A schema definition string, or a path to a file containing the definition

  • default_resolve (<#call(type, field, obj, args, ctx)>) (defaults to: nil) —

    A callable for handling field resolution

  • parser (Object) (defaults to: GraphQL.default_parser) —

    An object for handling definition string parsing (must respond to parse)

  • using (Hash) (defaults to: {}) —

    Plugins to attach to the created schema with use(key, value)

Returns:

  • (Class) —

    the schema described by document



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# File 'lib/graphql/schema.rb', line 115

def from_definition(definition_or_path, default_resolve: nil, parser: GraphQL.default_parser, using: {})
  # If the file ends in `.graphql` or `.graphqls`, treat it like a filepath
  if definition_or_path.end_with?(".graphql") || definition_or_path.end_with?(".graphqls")
    GraphQL::Schema::BuildFromDefinition.from_definition_path(
      self,
      definition_or_path,
      default_resolve: default_resolve,
      parser: parser,
      using: using,
    )
  else
    GraphQL::Schema::BuildFromDefinition.from_definition(
      self,
      definition_or_path,
      default_resolve: default_resolve,
      parser: parser,
      using: using,
    )
  end
end

.from_introspection(introspection_result) ⇒ Class<GraphQL::Schema>

Create schema with the result of an introspection query.

Parameters:

Returns:



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# File 'lib/graphql/schema.rb', line 105

def from_introspection(introspection_result)
  GraphQL::Schema::Loader.load(introspection_result)
end

.get_field(type_or_name, field_name, context = GraphQL::Query::NullContext.instance) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 709

def get_field(type_or_name, field_name, context = GraphQL::Query::NullContext.instance)
  parent_type = case type_or_name
  when LateBoundType
    get_type(type_or_name.name, context)
  when String
    get_type(type_or_name, context)
  when Module
    type_or_name
  else
    raise GraphQL::InvariantError, "Unexpected field owner for #{field_name.inspect}: #{type_or_name.inspect} (#{type_or_name.class})"
  end

  if parent_type.kind.fields? && (field = parent_type.get_field(field_name, context))
    field
  elsif parent_type == query && (entry_point_field = introspection_system.entry_point(name: field_name))
    entry_point_field
  elsif (dynamic_field = introspection_system.dynamic_field(name: field_name))
    dynamic_field
  else
    nil
  end
end

.get_fields(type, context = GraphQL::Query::NullContext.instance) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 732

def get_fields(type, context = GraphQL::Query::NullContext.instance)
  type.fields(context)
end

.get_type(type_name, context = GraphQL::Query::NullContext.instance, use_visibility_profile = use_visibility_profile?) ) ⇒ Module?

Returns A type, or nil if there's no type called type_name.

Parameters:

  • type_name (String)
  • context (GraphQL::Query::Context) (defaults to: GraphQL::Query::NullContext.instance) —

    Used for filtering definitions at query-time

  • use_visibility_profile (defaults to: use_visibility_profile?) ) —

    Private, for migration to Visibility

Returns:

  • (Module, nil) —

    A type, or nil if there's no type called type_name



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# File 'lib/graphql/schema.rb', line 375

def get_type(type_name, context = GraphQL::Query::NullContext.instance, use_visibility_profile = use_visibility_profile?)
  if use_visibility_profile
    return Visibility::Profile.from_context(context, self).type(type_name)
  end
  local_entry = own_types[type_name]
  type_defn = case local_entry
  when nil
    nil
  when Array
    if context.respond_to?(:types) && context.types.is_a?(GraphQL::Schema::Visibility::Profile)
      local_entry
    else
      visible_t = nil
      warden = Warden.from_context(context)
      local_entry.each do |t|
        if warden.visible_type?(t, context)
          if visible_t.nil?
            visible_t = t
          else
            raise DuplicateNamesError.new(
              duplicated_name: type_name, duplicated_definition_1: visible_t.inspect, duplicated_definition_2: t.inspect
            )
          end
        end
      end
      visible_t
    end
  when Module
    local_entry
  else
    raise "Invariant: unexpected own_types[#{type_name.inspect}]: #{local_entry.inspect}"
  end

  type_defn ||
    introspection_system.types[type_name] || # todo context-specific introspection?
    (superclass.respond_to?(:get_type) ? superclass.get_type(type_name, context, use_visibility_profile) : nil)
end

.handle_or_reraise(context, err) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema.rb', line 1122

def handle_or_reraise(context, err)
  handler = Execution::Errors.find_handler_for(self, err.class)
  if handler
    obj = context[:current_object]
    args = context[:current_arguments]
    args = args && args.respond_to?(:keyword_arguments) ? args.keyword_arguments : nil
    field = context[:current_field]
    if obj.is_a?(GraphQL::Schema::Object)
      obj = obj.object
    end
    handler[:handler].call(err, obj, args, context, field)
  else
    raise err
  end
end

.has_defined_type?(type_name) ⇒ Boolean

Returns Does this schema have any definition for a type named type_name, regardless of visibility?.

Returns:

  • (Boolean) —

    Does this schema have any definition for a type named type_name, regardless of visibility?



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# File 'lib/graphql/schema.rb', line 414

def has_defined_type?(type_name)
  own_types.key?(type_name) || introspection_system.types.key?(type_name) || (superclass.respond_to?(:has_defined_type?) ? superclass.has_defined_type?(type_name) : false)
end

.id_from_object(application_object, graphql_type, context) ⇒ String

Return a stable ID string for object so that it can be refetched later, using object_from_id.

GlobalID(https://github.com/rails/globalid) and SQIDs(https://sqids.org/ruby) can both be used to create IDs.

Examples:

Using Rails's GlobalID to generate IDs

def self.id_from_object(application_object, graphql_type, context)
  application_object.to_gid_param
end

Parameters:

  • application_object (Object) —

    Some object encountered by GraphQL-Ruby while running a query

  • graphql_type (Class, Module) —

    The type that GraphQL-Ruby is using for application_object during this query

  • context (GraphQL::Query::Context) —

    The context for the operation that is currently running

Returns:

  • (String) —

    A stable identifier which can be passed to object_from_id later to re-fetch application_object

Raises:



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# File 'lib/graphql/schema.rb', line 1234

def id_from_object(application_object, graphql_type, context)
  raise GraphQL::RequiredImplementationMissingError, "#{self.name}.id_from_object(application_object, graphql_type, context) must be implemented to create global ids (tried to create an id for `#{application_object.inspect}`)"
end

.inherited(child_class) ⇒ Object

rubocop:enable Lint/DuplicateMethods



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# File 'lib/graphql/schema.rb', line 1186

def inherited(child_class)
  if self == GraphQL::Schema
    child_class.directives(default_directives.values)
    child_class.extend(SubclassGetReferencesTo)
  end
  # Make sure the child class has these built out, so that
  # subclasses can be modified by later calls to `trace_with`
  own_trace_modes.each do |name, _class|
    child_class.own_trace_modes[name] = child_class.build_trace_mode(name)
  end
  child_class.singleton_class.prepend(ResolveTypeWithType)

  if use_visibility_profile?
    vis = self.visibility
    child_class.visibility = vis.dup_for(child_class)
  end
  super
end

.instrument(instrument_step, instrumenter, options = {}) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1325

def instrument(instrument_step, instrumenter, options = {})
  warn <<~WARN
  Schema.instrument is deprecated, use `trace_with` instead: https://graphql-ruby.org/queries/tracing.html"
    (From `#{self}.instrument(#{instrument_step}, #{instrumenter})` at #{caller(1, 1).first})

  WARN
  trace_with(Tracing::LegacyHooksTrace)
  own_instrumenters[instrument_step] << instrumenter
end

.instrumenters ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1548

def instrumenters
  inherited_instrumenters = find_inherited_value(:instrumenters) || Hash.new { |h,k| h[k] = [] }
  inherited_instrumenters.merge(own_instrumenters) do |_step, inherited, own|
    inherited + own
  end
end

.introspection(new_introspection_namespace = nil) ⇒ Module?

Pass a custom introspection module here to use it for this schema.

Parameters:

  • new_introspection_namespace (Module) (defaults to: nil) —

    If given, use this module for custom introspection on the schema

Returns:

  • (Module, nil) —

    The configured namespace, if there is one



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# File 'lib/graphql/schema.rb', line 739

def introspection(new_introspection_namespace = nil)
  if new_introspection_namespace
    @introspection = new_introspection_namespace
    # reset this cached value:
    @introspection_system = nil
    introspection_system
    @introspection
  else
    @introspection || find_inherited_value(:introspection)
  end
end

.introspection_system ⇒ Schema::IntrospectionSystem

Returns Based on introspection.

Returns:



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# File 'lib/graphql/schema.rb', line 752

def introspection_system
  if !@introspection_system
    @introspection_system = Schema::IntrospectionSystem.new(self)
    @introspection_system.resolve_late_bindings
    self.visibility&.introspection_system_configured(@introspection_system)
  end
  @introspection_system
end

.lazy?(obj) ⇒ Boolean

Returns True if this object should be lazily resolved.

Returns:

  • (Boolean) —

    True if this object should be lazily resolved



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# File 'lib/graphql/schema.rb', line 1613

def lazy?(obj)
  !!lazy_method_name(obj)
end

.lazy_method_name(obj) ⇒ Symbol?

Returns The method name to lazily resolve obj, or nil if obj's class wasn't registered with #lazy_resolve.

Returns:

  • (Symbol, nil) —

    The method name to lazily resolve obj, or nil if obj's class wasn't registered with #lazy_resolve.



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# File 'lib/graphql/schema.rb', line 1608

def lazy_method_name(obj)
  lazy_methods.get(obj)
end

.lazy_resolve(lazy_class, value_method) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1321

def lazy_resolve(lazy_class, value_method)
  lazy_methods.set(lazy_class, value_method)
end

.load_type(type_name, ctx) ⇒ Object

Called when a type is needed by name at runtime



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# File 'lib/graphql/schema.rb', line 1252

def load_type(type_name, ctx)
  get_type(type_name, ctx)
end

.max_complexity_count_introspection_fields ⇒ Object 



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# File 'lib/graphql/schema.rb', line 892

def max_complexity_count_introspection_fields
  if defined?(@max_complexity_count_introspection_fields)
    @max_complexity_count_introspection_fields
  else
    find_inherited_value(:max_complexity_count_introspection_fields, true)
  end
end

.max_query_string_tokens(new_max_tokens = NOT_CONFIGURED) ⇒ nil, Integer

A limit on the number of tokens to accept on incoming query strings. Use this to prevent parsing maliciously-large query strings.

Returns:

  • (nil, Integer) 


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# File 'lib/graphql/schema.rb', line 779

def max_query_string_tokens(new_max_tokens = NOT_CONFIGURED)
  if NOT_CONFIGURED.equal?(new_max_tokens)
    defined?(@max_query_string_tokens) ? @max_query_string_tokens : find_inherited_value(:max_query_string_tokens)
  else
    @max_query_string_tokens = new_max_tokens
  end
end

.multiplex(queries, **kwargs) ⇒ Array<GraphQL::Query::Result>

Execute several queries on itself, concurrently.

Examples:

Run several queries at once

context = { ... }
queries = [
  { query: params[:query_1], variables: params[:variables_1], context: context },
  { query: params[:query_2], variables: params[:variables_2], context: context },
]
results = MySchema.multiplex(queries)
render json: {
  result_1: results[0],
  result_2: results[1],
}

Parameters:

  • queries (Array<Hash>) —

    Keyword arguments for each query

  • context (Hash) —

    Multiplex-level context

Returns:

See Also:

  • for query keyword arguments
  • for multiplex keyword arguments


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# File 'lib/graphql/schema.rb', line 1544

def multiplex(queries, **kwargs)
  GraphQL::Execution::Interpreter.run_all(self, queries, **kwargs)
end

.multiplex_analyzer(new_analyzer) ⇒ Object

Parameters:

See Also:



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# File 'lib/graphql/schema.rb', line 1485

def multiplex_analyzer(new_analyzer)
  own_multiplex_analyzers << new_analyzer
end

.multiplex_analyzers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1489

def multiplex_analyzers
  find_inherited_value(:multiplex_analyzers, EMPTY_ARRAY) + own_multiplex_analyzers
end

.mutation(new_mutation_object = nil, &lazy_load_block) ⇒ Class<GraphQL::Schema::Object>?

Get or set the root mutation { ... } object for this schema.

Examples:

Using Types::Mutation as the entry-point

mutation { Types::Mutation }

Parameters:

  • new_mutation_object (Class<GraphQL::Schema::Object>) (defaults to: nil) —

    The root type to use for mutations

  • lazy_load_block —

    If a block is given, then it will be called when GraphQL-Ruby needs the root mutation type.

Returns:



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# File 'lib/graphql/schema.rb', line 484

def mutation(new_mutation_object = nil, &lazy_load_block)
  if new_mutation_object || block_given?
    if @mutation_object
      dup_defn = new_mutation_object || yield
      raise GraphQL::Error, "Second definition of `mutation(...)` (#{dup_defn.inspect}) is invalid, already configured with #{@mutation_object.inspect}"
    elsif use_visibility_profile?
      if block_given?
        if visibility.preload?
          @mutation_object = lazy_load_block.call
          self.visibility.mutation_configured(@mutation_object)
        else
          @mutation_object = lazy_load_block
        end
      else
        @mutation_object = new_mutation_object
        self.visibility.mutation_configured(@mutation_object)
      end
    else
      @mutation_object = new_mutation_object || lazy_load_block.call
      add_type_and_traverse(@mutation_object, root: true)
    end
    nil
  elsif @mutation_object.is_a?(Proc)
    @mutation_object = @mutation_object.call
    self.visibility&.mutation_configured(@mutation_object)
    @mutation_object
  else
    @mutation_object || find_inherited_value(:mutation)
  end
end

.mutation_execution_strategy(new_mutation_execution_strategy = nil, deprecation_warning: true) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 807

def mutation_execution_strategy(new_mutation_execution_strategy = nil, deprecation_warning: true)
  if deprecation_warning
    warn "GraphQL::Schema.mutation_execution_strategy is deprecated without replacement. Use `GraphQL::Query.new` directly to create and execute a custom query instead."
      warn "  #{caller(1, 1).first}"
  end
  if new_mutation_execution_strategy
    @mutation_execution_strategy = new_mutation_execution_strategy
  else
    @mutation_execution_strategy || (superclass.respond_to?(:mutation_execution_strategy) ? superclass.mutation_execution_strategy(deprecation_warning: false) : self.default_execution_strategy)
  end
end

.new_trace(mode: nil, **options) ⇒ Tracing::Trace

Create a trace instance which will include the trace modules specified for the optional mode.

If no mode: is given, then default_trace_mode will be used.

Parameters:

  • mode (Symbol) (defaults to: nil) —

    Trace modules for this trade mode will be included

  • options (Hash) —

    Keywords that will be passed to the tracing class during #initialize

Returns:



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# File 'lib/graphql/schema.rb', line 1448

def new_trace(mode: nil, **options)
  target = options[:query] || options[:multiplex]
  mode ||= target && target.context[:trace_mode]

  trace_mode = if mode
    mode
  elsif target && target.context[:backtrace]
    if default_trace_mode != :default
      raise ArgumentError, "Can't use `context[:backtrace]` with a custom default trace mode (`#{dm.inspect}`)"
    else
      own_trace_modes[:default_backtrace] ||= build_trace_mode(:default_backtrace)
      options_trace_mode = :default
      :default_backtrace
    end
  else
    default_trace_mode
  end

  options_trace_mode ||= trace_mode
  base_trace_options = trace_options_for(options_trace_mode)
  trace_options = base_trace_options.merge(options)
  trace_class_for_mode = trace_class_for(trace_mode, build: true)
  trace_class_for_mode.new(**trace_options)
end

.object_from_id(object_id, context) ⇒ Object?

Fetch an object based on an incoming ID and the current context. This method should return an object from your application, or return nil if there is no object or the object shouldn't be available to this operation.

Examples:

Fetching an object with Rails's GlobalID

def self.object_from_id(object_id, _context)
  GlobalID.find(global_id)
  # TODO: use `context[:current_user]` to determine if this object is authorized.
end

Parameters:

  • object_id (String) —

    The ID to fetch an object for. This may be client-provided (as in node(id: ...) or loads:) or previously stored by the schema (eg, by the ObjectCache)

  • context (GraphQL::Query::Context) —

    The context for the currently-executing operation

Returns:

  • (Object, nil) —

    The application which object_id references, or nil if there is no object or the current operation shouldn't have access to the object

Raises:

See Also:



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# File 'lib/graphql/schema.rb', line 1217

def object_from_id(object_id, context)
  raise GraphQL::RequiredImplementationMissingError, "#{self.name}.object_from_id(object_id, context) must be implemented to load by ID (tried to load from id `#{object_id}`)"
end

.orphan_types(*new_orphan_types) ⇒ Array<Class<GraphQL::Schema::Object>>

Tell the schema about these types so that they can be registered as implementations of interfaces in the schema.

This method must be used when an object type is connected to the schema as an interface implementor but not as a return type of a field. In that case, if the object type isn't registered here, GraphQL-Ruby won't be able to find it.

Parameters:

  • new_orphan_types (Array<Class<GraphQL::Schema::Object>>) —

    Object types to register as implementations of interfaces in the schema.

Returns:



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# File 'lib/graphql/schema.rb', line 1007

def orphan_types(*new_orphan_types)
  if !new_orphan_types.empty?
    new_orphan_types = new_orphan_types.flatten
    non_object_types = new_orphan_types.reject { |ot| ot.is_a?(Class) && ot < GraphQL::Schema::Object }
    if !non_object_types.empty?
      raise ArgumentError, <<~ERR
        Only object type classes should be added as `orphan_types(...)`.

        - Remove these no-op types from `orphan_types`: #{non_object_types.map { |t| "#{t.inspect} (#{t.kind.name})"}.join(", ")}
        - See https://graphql-ruby.org/type_definitions/interfaces.html#orphan-types

        To add other types to your schema, you might want `extra_types`: https://graphql-ruby.org/schema/definition.html#extra-types
      ERR
    end
    add_type_and_traverse(new_orphan_types, root: false) unless use_visibility_profile?
    own_orphan_types.concat(new_orphan_types.flatten)
    self.visibility&.orphan_types_configured(new_orphan_types)
  end

  inherited_ot = find_inherited_value(:orphan_types, nil)
  if inherited_ot
    if !own_orphan_types.empty?
      inherited_ot + own_orphan_types
    else
      inherited_ot
    end
  else
    own_orphan_types
  end
end

.own_trace_modes ⇒ Object 



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# File 'lib/graphql/schema.rb', line 207

def own_trace_modes
  @own_trace_modes ||= {}
end

.own_trace_modules ⇒ Object 



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# File 'lib/graphql/schema.rb', line 244

def own_trace_modules
  @own_trace_modules ||= Hash.new { |h, k| h[k] = [] }
end

.parse_error(parse_err, ctx) ⇒ Object

A function to call when #execute receives an invalid query string

The default is to add the error to context.errors

Parameters:

Returns:

  • void



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# File 'lib/graphql/schema.rb', line 1317

def parse_error(parse_err, ctx)
  ctx.errors.push(parse_err)
end

.plugins ⇒ Object 



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# File 'lib/graphql/schema.rb', line 335

def plugins
  find_inherited_value(:plugins, EMPTY_ARRAY) + own_plugins
end

.possible_types(type = nil, context = GraphQL::Query::NullContext.instance, use_visibility_profile = use_visibility_profile?) ) ⇒ Hash<String, Module>, Array<Module>

Parameters:

  • type (Module) (defaults to: nil) —

    The type definition whose possible types you want to see

  • context (GraphQL::Query::Context) (defaults to: GraphQL::Query::NullContext.instance) —

    used for filtering visible possible types at runtime

  • use_visibility_profile (defaults to: use_visibility_profile?) ) —

    Private, for migration to Visibility

Returns:

  • (Hash<String, Module>) —

    All possible types, if no type is given.

  • (Array<Module>) —

    Possible types for type, if it's given.



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# File 'lib/graphql/schema.rb', line 625

def possible_types(type = nil, context = GraphQL::Query::NullContext.instance, use_visibility_profile = use_visibility_profile?)
  if use_visibility_profile
    if type
      return Visibility::Profile.from_context(context, self).possible_types(type)
    else
      raise "Schema.possible_types is not implemented for `use_visibility_profile?`"
    end
  end
  if type
    # TODO duck-typing `.possible_types` would probably be nicer here
    if type.kind.union?
      type.possible_types(context: context)
    else
      stored_possible_types = own_possible_types[type]
      visible_possible_types = if stored_possible_types && type.kind.interface?
        stored_possible_types.select do |possible_type|
          possible_type.interfaces(context).include?(type)
        end
      else
        stored_possible_types
      end
      visible_possible_types ||
        introspection_system.possible_types[type] ||
        (
          superclass.respond_to?(:possible_types) ?
            superclass.possible_types(type, context, use_visibility_profile) :
            EMPTY_ARRAY
        )
    end
  else
    find_inherited_value(:possible_types, EMPTY_HASH)
      .merge(own_possible_types)
      .merge(introspection_system.possible_types)
  end
end

.query(new_query_object = nil, &lazy_load_block) ⇒ Class<GraphQL::Schema::Object>?

Get or set the root query { ... } object for this schema.

Examples:

Using Types::Query as the entry-point

query { Types::Query }

Parameters:

  • new_query_object (Class<GraphQL::Schema::Object>) (defaults to: nil) —

    The root type to use for queries

  • lazy_load_block —

    If a block is given, then it will be called when GraphQL-Ruby needs the root query type.

Returns:



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# File 'lib/graphql/schema.rb', line 445

def query(new_query_object = nil, &lazy_load_block)
  if new_query_object || block_given?
    if @query_object
      dup_defn = new_query_object || yield
      raise GraphQL::Error, "Second definition of `query(...)` (#{dup_defn.inspect}) is invalid, already configured with #{@query_object.inspect}"
    elsif use_visibility_profile?
      if block_given?
        if visibility.preload?
          @query_object = lazy_load_block.call
          self.visibility.query_configured(@query_object)
        else
          @query_object = lazy_load_block
        end
      else
        @query_object = new_query_object
        self.visibility.query_configured(@query_object)
      end
    else
      @query_object = new_query_object || lazy_load_block.call
      add_type_and_traverse(@query_object, root: true)
    end
    nil
  elsif @query_object.is_a?(Proc)
    @query_object = @query_object.call
    self.visibility&.query_configured(@query_object)
    @query_object
  else
    @query_object || find_inherited_value(:query)
  end
end

.query_analyzer(new_analyzer) ⇒ Object

Parameters:

See Also:



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# File 'lib/graphql/schema.rb', line 1475

def query_analyzer(new_analyzer)
  own_query_analyzers << new_analyzer
end

.query_analyzers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1479

def query_analyzers
  find_inherited_value(:query_analyzers, EMPTY_ARRAY) + own_query_analyzers
end

.query_class(new_query_class = NOT_CONFIGURED) ⇒ Object

Parameters:

  • new_query_class (Class<GraphQL::Query>) (defaults to: NOT_CONFIGURED) —

    A subclass to use when executing queries



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# File 'lib/graphql/schema.rb', line 861

def query_class(new_query_class = NOT_CONFIGURED)
  if NOT_CONFIGURED.equal?(new_query_class)
    @query_class || (superclass.respond_to?(:query_class) ? superclass.query_class : GraphQL::Query)
  else
    @query_class = new_query_class
  end
end

.query_execution_strategy(new_query_execution_strategy = nil, deprecation_warning: true) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 795

def query_execution_strategy(new_query_execution_strategy = nil, deprecation_warning: true)
  if deprecation_warning
    warn "GraphQL::Schema.query_execution_strategy is deprecated without replacement. Use `GraphQL::Query.new` directly to create and execute a custom query instead."
    warn "  #{caller(1, 1).first}"
  end
  if new_query_execution_strategy
    @query_execution_strategy = new_query_execution_strategy
  else
    @query_execution_strategy || (superclass.respond_to?(:query_execution_strategy) ? superclass.query_execution_strategy(deprecation_warning: false) : self.default_execution_strategy)
  end
end

.query_stack_error(query, err) ⇒ void

This method returns an undefined value.

Called when execution encounters a SystemStackError. By default, it adds a client-facing error to the response. You could modify this method to report this error to your bug tracker.

Parameters:



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# File 'lib/graphql/schema.rb', line 1573

def query_stack_error(query, err)
  query.context.errors.push(GraphQL::ExecutionError.new("This query is too large to execute."))
end

.references_to(to_type = nil, from: nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 684

def references_to(to_type = nil, from: nil)
  if to_type
    if from
      refs = own_references_to[to_type] ||= []
      refs << from
    else
      get_references_to(to_type) || EMPTY_ARRAY
    end
  else
    # `@own_references_to` can be quite large for big schemas,
    # and generally speaking, we won't inherit any values.
    # So optimize the most common case -- don't create a duplicate Hash.
    inherited_value = find_inherited_value(:references_to, EMPTY_HASH)
    if !inherited_value.empty?
      inherited_value.merge(own_references_to)
    else
      own_references_to
    end
  end
end

.rescue_from(*err_classes, &handler_block) {|error, object, arguments, context| ... } ⇒ Object

Register a handler for errors raised during execution. The handlers can return a new value or raise a new error.

Examples:

Handling "not found" with a client-facing error

rescue_from(ActiveRecord::NotFound) { raise GraphQL::ExecutionError, "An object could not be found" }

Parameters:

  • err_classes (Array<StandardError>) —

    Classes which should be rescued by handler_block

  • handler_block —

    The code to run when one of those errors is raised during execution

Yield Parameters:

  • error (StandardError) —

    An instance of one of the configured err_classes

  • object (Object) —

    The current application object in the query when the error was raised

  • arguments (GraphQL::Query::Arguments) —

    The current field arguments when the error was raised

  • context (GraphQL::Query::Context) —

    The context for the currently-running operation

Yield Returns:

  • (Object) —

    Some object to use in the place where this error was raised

Raises:

  • (GraphQL::ExecutionError) —

    In the handler, raise to add a client-facing error to the response

  • (StandardError) —

    In the handler, raise to crash the query with a developer-facing error



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# File 'lib/graphql/schema.rb', line 1099

def rescue_from(*err_classes, &handler_block)
  err_classes.each do |err_class|
    Execution::Errors.register_rescue_from(err_class, error_handlers[:subclass_handlers], handler_block)
  end
end

.resolve_type(abstract_type, application_object, context) ⇒ Class<GraphQL::Schema::Object] The Object type definition to use for `obj`

GraphQL-Ruby calls this method during execution when it needs the application to determine the type to use for an object.

Usually, this object was returned from a field whose return type is an Interface or a Union. But this method is called in other cases, too -- for example, when GraphQL::Schema::Argument.loads cases an object to be directly loaded from the database.

Examples:

Returning a GraphQL type based on the object's class name

class MySchema < GraphQL::Schema
  def resolve_type(_abs_type, object, _context)
    graphql_type_name = "Types::#{object.class.name}Type"
    graphql_type_name.constantize # If this raises a NameError, then come implement special cases in this method
  end
end

Parameters:

  • abstract_type (Class, Module, nil) —

    The Interface or Union type which is being resolved, if there is one

  • application_object (Object) —

    The object returned from a field whose type must be determined

  • context (GraphQL::Query::Context) —

    The query context for the currently-executing query

Returns:

Raises:



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# File 'lib/graphql/schema.rb', line 1181

def resolve_type(abstract_type, application_object, context)
  raise GraphQL::RequiredImplementationMissingError, "#{self.name}.resolve_type(abstract_type, application_object, context) must be implemented to use Union types, Interface types, or `loads:` (tried to resolve: #{abstract_type.name})"
end

.root_type_for_operation(operation) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema.rb', line 558

def root_type_for_operation(operation)
  case operation
  when "query"
    query
  when "mutation"
    mutation
  when "subscription"
    subscription
  else
    raise ArgumentError, "unknown operation type: #{operation}"
  end
end

.root_types ⇒ Array<Class>

Returns The root types (query, mutation, subscription) defined for this schema.

Returns:

  • (Array<Class>) —

    The root types (query, mutation, subscription) defined for this schema



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# File 'lib/graphql/schema.rb', line 572

def root_types
  if use_visibility_profile?
    [query, mutation, subscription].compact
  else
    @root_types
  end
end

.sanitized_printer(new_sanitized_printer = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1493

def sanitized_printer(new_sanitized_printer = nil)
  if new_sanitized_printer
    @own_sanitized_printer = new_sanitized_printer
  else
    @own_sanitized_printer || GraphQL::Language::SanitizedPrinter
  end
end

.schema_directive(dir_class, **options) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1242

def schema_directive(dir_class, **options)
  @own_schema_directives ||= []
  Member::HasDirectives.add_directive(self, @own_schema_directives, dir_class, options)
end

.schema_directives ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1247

def schema_directives
  Member::HasDirectives.get_directives(self, @own_schema_directives, :schema_directives)
end

.static_validator ⇒ Object 



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# File 'lib/graphql/schema.rb', line 319

def static_validator
  GraphQL::StaticValidation::Validator.new(schema: self)
end

.subscription(new_subscription_object = nil, &lazy_load_block) ⇒ Class<GraphQL::Schema::Object>?

Get or set the root subscription { ... } object for this schema.

Examples:

Using Types::Subscription as the entry-point

subscription { Types::Subscription }

Parameters:

  • new_subscription_object (Class<GraphQL::Schema::Object>) (defaults to: nil) —

    The root type to use for subscriptions

  • lazy_load_block —

    If a block is given, then it will be called when GraphQL-Ruby needs the root subscription type.

Returns:



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# File 'lib/graphql/schema.rb', line 523

def subscription(new_subscription_object = nil, &lazy_load_block)
  if new_subscription_object || block_given?
    if @subscription_object
      dup_defn = new_subscription_object || yield
      raise GraphQL::Error, "Second definition of `subscription(...)` (#{dup_defn.inspect}) is invalid, already configured with #{@subscription_object.inspect}"
    elsif use_visibility_profile?
      if block_given?
        if visibility.preload?
          @subscription_object = lazy_load_block.call
          visibility.subscription_configured(@subscription_object)
        else
          @subscription_object = lazy_load_block
        end
      else
        @subscription_object = new_subscription_object
        self.visibility.subscription_configured(@subscription_object)
      end
      add_subscription_extension_if_necessary
    else
      @subscription_object = new_subscription_object || lazy_load_block.call
      add_subscription_extension_if_necessary
      add_type_and_traverse(@subscription_object, root: true)
    end
    nil
  elsif @subscription_object.is_a?(Proc)
    @subscription_object = @subscription_object.call
    add_subscription_extension_if_necessary
    self.visibility.subscription_configured(@subscription_object)
    @subscription_object
  else
    @subscription_object || find_inherited_value(:subscription)
  end
end

.subscription_execution_strategy(new_subscription_execution_strategy = nil, deprecation_warning: true) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 819

def subscription_execution_strategy(new_subscription_execution_strategy = nil, deprecation_warning: true)
  if deprecation_warning
    warn "GraphQL::Schema.subscription_execution_strategy is deprecated without replacement. Use `GraphQL::Query.new` directly to create and execute a custom query instead."
    warn "  #{caller(1, 1).first}"
  end
  if new_subscription_execution_strategy
    @subscription_execution_strategy = new_subscription_execution_strategy
  else
    @subscription_execution_strategy || (superclass.respond_to?(:subscription_execution_strategy) ? superclass.subscription_execution_strategy(deprecation_warning: false) : self.default_execution_strategy)
  end
end

.subscriptions(inherited: true) ⇒ GraphQL::Subscriptions

Returns:



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# File 'lib/graphql/schema.rb', line 141

def subscriptions(inherited: true)
  defined?(@subscriptions) ? @subscriptions : (inherited ? find_inherited_value(:subscriptions, nil) : nil)
end

.subscriptions=(new_implementation) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 145

def subscriptions=(new_implementation)
  @subscriptions = new_implementation
end

.sync_lazy(value) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Override this method to handle lazy objects in a custom way.

Parameters:

Returns:

  • (Object) —

    A GraphQL-ready (non-lazy) object



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# File 'lib/graphql/schema.rb', line 1597

def sync_lazy(value)
  lazy_method = lazy_method_name(value)
  if lazy_method
    synced_value = value.public_send(lazy_method)
    sync_lazy(synced_value)
  else
    value
  end
end

.to_definition(context: {}) ⇒ String

Return the GraphQL IDL for the schema

Parameters:

  • context (Hash) (defaults to: {})

Returns:

  • (String) 


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# File 'lib/graphql/schema.rb', line 290

def to_definition(context: {})
  GraphQL::Schema::Printer.print_schema(self, context: context)
end

.to_document ⇒ GraphQL::Language::Document

Return the GraphQL::Language::Document IDL AST for the schema

Returns:

  • (GraphQL::Language::Document) 


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# File 'lib/graphql/schema.rb', line 296

def to_document
  GraphQL::Language::DocumentFromSchemaDefinition.new(self).document
end

.to_json(**args) ⇒ String

Returns the JSON response of Introspection::INTROSPECTION_QUERY.

Returns:

  • (String)

See Also:

  • {{#as_json}


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# File 'lib/graphql/schema.rb', line 261

def to_json(**args)
  JSON.pretty_generate(as_json(**args))
end

.trace_class(new_class = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 162

def trace_class(new_class = nil)
  if new_class
    # If any modules were already added for `:default`,
    # re-apply them here
    mods = trace_modules_for(:default)
    mods.each { |mod| new_class.include(mod) }
    new_class.include(DefaultTraceClass)
    trace_mode(:default, new_class)
    backtrace_class = Class.new(new_class)
    backtrace_class.include(GraphQL::Backtrace::Trace)
    trace_mode(:default_backtrace, backtrace_class)
  end
  trace_class_for(:default, build: true)
end

.trace_class_for(mode, build: false) ⇒ Class

Return the trace class to use for this mode, looking one up on the superclass if this Schema doesn't have one defined.

Returns:

  • (Class) —

    Return the trace class to use for this mode, looking one up on the superclass if this Schema doesn't have one defined.



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# File 'lib/graphql/schema.rb', line 178

def trace_class_for(mode, build: false)
  if (trace_class = own_trace_modes[mode])
    trace_class
  elsif superclass.respond_to?(:trace_class_for) && (trace_class = superclass.trace_class_for(mode, build: false))
    trace_class
  elsif build
    own_trace_modes[mode] = build_trace_mode(mode)
  else
    nil
  end
end

.trace_mode(mode_name, trace_class) ⇒ Object

Configure trace_class to be used whenever context: { trace_mode: mode_name } is requested. default_trace_mode is used when no trace_mode: ... is requested.

When a trace_class is added this way, it will not receive other modules added with trace_with(...) unless trace_mode is explicitly given. (This class will not receive any default trace modules.)

Subclasses of the schema will use trace_class as a base class for this mode and those subclass also will not receive default tracing modules.

Parameters:

  • mode_name (Symbol)
  • trace_class (Class) —

    subclass of GraphQL::Tracing::Trace

Returns:

  • void



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# File 'lib/graphql/schema.rb', line 202

def trace_mode(mode_name, trace_class)
  own_trace_modes[mode_name] = trace_class
  nil
end

.trace_modules_for(trace_mode) ⇒ Array<Module>

Returns Modules added for tracing in trace_mode, including inherited ones.

Returns:

  • (Array<Module>) —

    Modules added for tracing in trace_mode, including inherited ones



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# File 'lib/graphql/schema.rb', line 249

def trace_modules_for(trace_mode)
  modules = own_trace_modules[trace_mode]
  if superclass.respond_to?(:trace_modules_for)
    modules += superclass.trace_modules_for(trace_mode)
  end
  modules
end

.trace_options_for(mode) ⇒ Hash

The options hash for this trace mode

Returns:

  • (Hash) 


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# File 'lib/graphql/schema.rb', line 1426

def trace_options_for(mode)
  @trace_options_for_mode ||= {}
  @trace_options_for_mode[mode] ||= begin
    # It may be time to create an options hash for a mode that wasn't registered yet.
    # Mix in the default options in that case.
    default_options = mode == :default ? EMPTY_HASH : trace_options_for(:default)
    # Make sure this returns a new object so that other hashes aren't modified later
    if superclass.respond_to?(:trace_options_for)
      superclass.trace_options_for(mode).merge(default_options)
    else
      default_options.dup
    end
  end
end

.trace_with(trace_mod, mode: :default, **options) ⇒ void

This method returns an undefined value.

Mix trace_mod into this schema's Trace class so that its methods will be called at runtime.

Parameters:

  • trace_mod (Module) —

    A module that implements tracing methods

  • mode (Symbol) (defaults to: :default) —

    Trace module will only be used for this trade mode

  • options (Hash) —

    Keywords that will be passed to the tracing class during #initialize

See Also:



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# File 'lib/graphql/schema.rb', line 1396

def trace_with(trace_mod, mode: :default, **options)
  if mode.is_a?(Array)
    mode.each { |m| trace_with(trace_mod, mode: m, **options) }
  else
    tc = own_trace_modes[mode] ||= build_trace_mode(mode)
    tc.include(trace_mod)
    own_trace_modules[mode] << trace_mod
    add_trace_options_for(mode, options)
    if mode == :default
      # This module is being added as a default tracer. If any other mode classes
      # have already been created, but get their default behavior from a superclass,
      # Then mix this into this schema's subclass.
      # (But don't mix it into mode classes that aren't default-based.)
      own_trace_modes.each do |other_mode_name, other_mode_class|
        if other_mode_class < DefaultTraceClass
          # Don't add it back to the inheritance tree if it's already there
          if !(other_mode_class < trace_mod)
            other_mode_class.include(trace_mod)
          end
          # Add any options so they'll be available
          add_trace_options_for(other_mode_name, options)
        end
      end
    end
  end
  nil
end

.tracer(new_tracer, silence_deprecation_warning: false) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1371

def tracer(new_tracer, silence_deprecation_warning: false)
  if !silence_deprecation_warning
    warn("`Schema.tracer(#{new_tracer.inspect})` is deprecated; use module-based `trace_with` instead. See: https://graphql-ruby.org/queries/tracing.html")
    warn "  #{caller(1, 1).first}"
  end
  default_trace = trace_class_for(:default, build: true)
  if default_trace.nil? || !(default_trace < GraphQL::Tracing::CallLegacyTracers)
    trace_with(GraphQL::Tracing::CallLegacyTracers)
  end

  own_tracers << new_tracer
end

.tracers ⇒ Object 



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# File 'lib/graphql/schema.rb', line 1384

def tracers
  find_inherited_value(:tracers, EMPTY_ARRAY) + own_tracers
end

.type_error(type_error, ctx) ⇒ void

This method returns an undefined value.

Called at runtime when GraphQL-Ruby encounters a mismatch between the application behavior and the GraphQL type system.

The default implementation of this method is to follow the GraphQL specification, but you can override this to report errors to your bug tracker or customize error handling.

Parameters:

  • type_error (GraphQL::Error) —

    several specific error classes are passed here, see the default implementation for details

  • context (GraphQL::Query::Context) —

    the context for the currently-running operation

Raises:



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# File 'lib/graphql/schema.rb', line 1300

def type_error(type_error, ctx)
  case type_error
  when GraphQL::InvalidNullError
    ctx.errors << type_error
  when GraphQL::UnresolvedTypeError, GraphQL::StringEncodingError, GraphQL::IntegerEncodingError
    raise type_error
  when GraphQL::IntegerDecodingError
    nil
  end
end

.type_from_ast(ast_node, context: self.query_class.new(self, "{ __typename }").context) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 705

def type_from_ast(ast_node, context: self.query_class.new(self, "{ __typename }").context)
  GraphQL::Schema::TypeExpression.build_type(context.query.types, ast_node)
end

.types(context = GraphQL::Query::NullContext.instance) ⇒ Hash<String => Class>

Build a map of { name => type } and return it

Returns:

  • (Hash<String => Class>) —

    A dictionary of type classes by their GraphQL name

See Also:



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# File 'lib/graphql/schema.rb', line 342

def types(context = GraphQL::Query::NullContext.instance)
  if use_visibility_profile?
    types = Visibility::Profile.from_context(context, self)
    return types.all_types_h
  end
  all_types = non_introspection_types.merge(introspection_system.types)
  visible_types = {}
  all_types.each do |k, v|
    visible_types[k] =if v.is_a?(Array)
      visible_t = nil
      v.each do |t|
        if t.visible?(context)
          if visible_t.nil?
            visible_t = t
          else
            raise DuplicateNamesError.new(
              duplicated_name: k, duplicated_definition_1: visible_t.inspect, duplicated_definition_2: t.inspect
            )
          end
        end
      end
      visible_t
    else
      v
    end
  end
  visible_types
end

.unauthorized_field(unauthorized_error) ⇒ Field

This hook is called when a field fails an authorized? check.

By default, this hook implements the same behavior as unauthorized_object.

Whatever value is returned from this method will be used instead of the unauthorized field . If an error is raised, then nil will be used.

If you want to add an error to the "errors" key, raise a ExecutionError in this hook.

Parameters:

Returns:

  • (Field) —

    The returned field will be put in the GraphQL response



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# File 'lib/graphql/schema.rb', line 1286

def unauthorized_field(unauthorized_error)
  unauthorized_object(unauthorized_error)
end

.unauthorized_object(unauthorized_error) ⇒ Object

This hook is called when an object fails an authorized? check. You might report to your bug tracker here, so you can correct the field resolvers not to return unauthorized objects.

By default, this hook just replaces the unauthorized object with nil.

Whatever value is returned from this method will be used instead of the unauthorized object (accessible as unauthorized_error.object). If an error is raised, then nil will be used.

If you want to add an error to the "errors" key, raise a ExecutionError in this hook.

Parameters:

Returns:

  • (Object) —

    The returned object will be put in the GraphQL response



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# File 'lib/graphql/schema.rb', line 1270

def unauthorized_object(unauthorized_error)
  nil
end

.union_memberships(type = nil) ⇒ Object 



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# File 'lib/graphql/schema.rb', line 661

def union_memberships(type = nil)
  if type
    own_um = own_union_memberships.fetch(type.graphql_name, EMPTY_ARRAY)
    inherited_um = find_inherited_value(:union_memberships, EMPTY_HASH).fetch(type.graphql_name, EMPTY_ARRAY)
    own_um + inherited_um
  else
    joined_um = own_union_memberships.dup
    find_inherited_value(:union_memberhips, EMPTY_HASH).each do |k, v|
      um = joined_um[k] ||= []
      um.concat(v)
    end
    joined_um
  end
end

.use(plugin, **kwargs) ⇒ Object

Add plugin to this schema

Parameters:

  • plugin (#use) —

    A Schema plugin

Returns:

  • void



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# File 'lib/graphql/schema.rb', line 326

def use(plugin, **kwargs)
  if !kwargs.empty?
    plugin.use(self, **kwargs)
  else
    plugin.use(self)
  end
  own_plugins << [plugin, kwargs]
end

.use_visibility_profile? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 610

def use_visibility_profile?
  if defined?(@use_visibility_profile)
    @use_visibility_profile
  elsif superclass.respond_to?(:use_visibility_profile?)
    superclass.use_visibility_profile?
  else
    false
  end
end

.validate(string_or_document, rules: nil, context: nil) ⇒ Array<GraphQL::StaticValidation::Error >

Validate a query string according to this schema.

Parameters:

Returns:



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# File 'lib/graphql/schema.rb', line 846

def validate(string_or_document, rules: nil, context: nil)
  doc = if string_or_document.is_a?(String)
    GraphQL.parse(string_or_document)
  else
    string_or_document
  end
  query = query_class.new(self, document: doc, context: context)
  validator_opts = { schema: self }
  rules && (validator_opts[:rules] = rules)
  validator = GraphQL::StaticValidation::Validator.new(**validator_opts)
  res = validator.validate(query, timeout: validate_timeout, max_errors: validate_max_errors)
  res[:errors]
end

.visible?(member, ctx) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema.rb', line 1238

def visible?(member, ctx)
  member.visible?(ctx)
end