Class: GraphQL::Schema

Inherits:
Object
  • Object
show all
Extended by:
Forwardable, FindInheritedValue, LazyHandlingMethods, Member::AcceptsDefinition, Member::HasAstNode
Includes:
Define::InstanceDefinable, LazyHandlingMethods
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/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/traversal.rb,
lib/graphql/schema/enum_value.rb,
lib/graphql/schema/validation.rb,
lib/graphql/schema/input_object.rb,
lib/graphql/schema/subscription.rb,
lib/graphql/schema/member/scoped.rb,
lib/graphql/schema/built_in_types.rb,
lib/graphql/schema/directive/skip.rb,
lib/graphql/schema/possible_types.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/middleware_chain.rb,
lib/graphql/schema/directive/feature.rb,
lib/graphql/schema/directive/include.rb,
lib/graphql/schema/member/build_type.rb,
lib/graphql/schema/member/has_fields.rb,
lib/graphql/schema/rescue_middleware.rb,
lib/graphql/schema/default_type_error.rb,
lib/graphql/schema/invalid_type_error.rb,
lib/graphql/schema/timeout_middleware.rb,
lib/graphql/schema/unique_within_type.rb,
lib/graphql/schema/catchall_middleware.rb,
lib/graphql/schema/default_parse_error.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/build_from_definition.rb,
lib/graphql/schema/field/scope_extension.rb,
lib/graphql/schema/member/instrumentation.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/member/accepts_definition.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/member/cached_graphql_definition.rb,
lib/graphql/schema/member/has_unresolved_type_error.rb,
lib/graphql/schema/build_from_definition/resolve_map.rb,
lib/graphql/schema/build_from_definition/resolve_map/default_resolve.rb

Overview

Extend this class to define GraphQL enums in your schema.

By default, GraphQL enum values are translated into Ruby strings. You can provide a custom value with the value: keyword.

Examples:

# equivalent to
# enum PizzaTopping {
#   MUSHROOMS
#   ONIONS
#   PEPPERS
# }
class PizzaTopping < GraphQL::Enum
  value :MUSHROOMS
  value :ONIONS
  value :PEPPERS
end

Defined Under Namespace

Modules: Base64Encoder, BuildFromDefinition, CatchallMiddleware, DefaultParseError, DefaultTypeError, FindInheritedValue, Interface, LazyHandlingMethods, Loader, NullMask, ResolveTypeWithType, TypeExpression, UniqueWithinType Classes: Argument, CyclicalDefinitionError, Directive, DuplicateTypeNamesError, Enum, EnumValue, Field, FieldExtension, Finder, InputObject, IntrospectionSystem, InvalidDocumentError, InvalidTypeError, LateBoundType, List, Member, MiddlewareChain, Mutation, NonNull, Object, PossibleTypes, Printer, RelayClassicMutation, RescueMiddleware, Resolver, Scalar, Subscription, Timeout, TimeoutMiddleware, Traversal, TypeMembership, Union, UnresolvedLateBoundTypeError, Validation, Warden, Wrapper

Constant Summary collapse

DYNAMIC_FIELDS =
["__type", "__typename", "__schema"].freeze
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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from LazyHandlingMethods

after_any_lazies, after_lazy, lazy?, lazy_method_name, sync_lazy

Methods included from Define::InstanceDefinable

#metadata, #redefine

Constructor Details

#initializeSchema

Returns a new instance of Schema.


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# File 'lib/graphql/schema.rb', line 263

def initialize
  @tracers = []
  @definition_error = nil
  @orphan_types = []
  @directives = {}
  self.class.default_directives.each do |name, dir|
    @directives[name] = dir.graphql_definition
  end
  @static_validator = GraphQL::StaticValidation::Validator.new(schema: self)
  @middleware = MiddlewareChain.new(final_step: GraphQL::Execution::Execute::FieldResolveStep)
  @query_analyzers = []
  @multiplex_analyzers = []
  @resolve_type_proc = nil
  @object_from_id_proc = nil
  @id_from_object_proc = nil
  @type_error_proc = DefaultTypeError
  @parse_error_proc = DefaultParseError
  @instrumenters = Hash.new { |h, k| h[k] = [] }
  @lazy_methods = GraphQL::Execution::Lazy::LazyMethodMap.new
  @lazy_methods.set(GraphQL::Execution::Lazy, :value)
  @cursor_encoder = Base64Encoder
  # Default to the built-in execution strategy:
  @analysis_engine = GraphQL::Analysis
  @query_execution_strategy = self.class.default_execution_strategy
  @mutation_execution_strategy = self.class.default_execution_strategy
  @subscription_execution_strategy = self.class.default_execution_strategy
  @default_mask = GraphQL::Schema::NullMask
  @rebuilding_artifacts = false
  @context_class = GraphQL::Query::Context
  @introspection_namespace = nil
  @introspection_system = nil
  @interpreter = false
  @error_bubbling = false
  @disable_introspection_entry_points = false
  @disable_schema_introspection_entry_point = false
  @disable_type_introspection_entry_point = false
end

Class Attribute Details

.analysis_engineObject


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# File 'lib/graphql/schema.rb', line 1284

def analysis_engine
  @analysis_engine || find_inherited_value(:analysis_engine, GraphQL::Analysis)
end

.connectionsGraphQL::Pagination::Connections

Returns if installed.

Returns:


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# File 'lib/graphql/schema.rb', line 1025

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

.default_execution_strategyObject


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# File 'lib/graphql/schema.rb', line 1377

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

.error_bubbling(new_error_bubbling = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1302

def error_bubbling(new_error_bubbling = nil)
  if !new_error_bubbling.nil?
    @error_bubbling = new_error_bubbling
  else
    @error_bubbling.nil? ? find_inherited_value(:error_bubbling) : @error_bubbling
  end
end

.error_handlerGraphQL::Execution::Errors, Class<GraphQL::Execution::Errors::NullErrorHandler>


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# File 'lib/graphql/schema.rb', line 1522

def error_handler
  if defined?(@error_handler)
    @error_handler
  else
    find_inherited_value(:error_handler, GraphQL::Execution::Errors::NullErrorHandler)
  end
end

.interpreter=(value) ⇒ Object (writeonly)

Sets the attribute interpreter

Parameters:

  • value

    the value to set the attribute interpreter to.


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

def interpreter=(value)
  @interpreter = value
end

.max_complexity(max_complexity = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1272

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

.max_depth(new_max_depth = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1314

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

.subscriptionsGraphQL::Subscriptions


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# File 'lib/graphql/schema.rb', line 868

def subscriptions
  @subscriptions
end

Instance Attribute Details

#analysis_engineObject

Returns the value of attribute analysis_engine


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# File 'lib/graphql/schema.rb', line 196

def analysis_engine
  @analysis_engine
end

#ast_nodeObject

Returns the value of attribute ast_node


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# File 'lib/graphql/schema.rb', line 196

def ast_node
  @ast_node
end

#connectionsObject

Returns the value of attribute connections


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# File 'lib/graphql/schema.rb', line 849

def connections
  @connections
end

#context_classClass

Returns Instantiated for each query.

Returns:

  • (Class)

    Instantiated for each query

See Also:

  • The parent class of these classes

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# File 'lib/graphql/schema.rb', line 224

def context_class
  @context_class
end

#cursor_encoderObject

Returns the value of attribute cursor_encoder


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# File 'lib/graphql/schema.rb', line 196

def cursor_encoder
  @cursor_encoder
end

#default_mask<#call(member, ctx)>

Returns A callable for filtering members of the schema.

Returns:

  • (<#call(member, ctx)>)

    A callable for filtering members of the schema

See Also:

  • for query-specific filters with `except:`

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# File 'lib/graphql/schema.rb', line 220

def default_mask
  @default_mask
end

#default_max_page_sizeObject

Returns the value of attribute default_max_page_size


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# File 'lib/graphql/schema.rb', line 196

def default_max_page_size
  @default_max_page_size
end

#directivesObject

Returns the value of attribute directives


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# File 'lib/graphql/schema.rb', line 196

def directives
  @directives
end

#disable_introspection_entry_pointsObject

[Boolean] True if this object disables the introspection entry point fields


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# File 'lib/graphql/schema.rb', line 227

def disable_introspection_entry_points
  @disable_introspection_entry_points
end

#disable_schema_introspection_entry_pointObject

[Boolean] True if this object disables the __schema introspection entry point field


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# File 'lib/graphql/schema.rb', line 234

def disable_schema_introspection_entry_point
  @disable_schema_introspection_entry_point
end

#disable_type_introspection_entry_pointObject

[Boolean] True if this object disables the __type introspection entry point field


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# File 'lib/graphql/schema.rb', line 241

def disable_type_introspection_entry_point
  @disable_type_introspection_entry_point
end

#error_bubblingObject

[Boolean] True if this object bubbles validation errors up from a field into its parent InputObject, if there is one.


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# File 'lib/graphql/schema.rb', line 209

def error_bubbling
  @error_bubbling
end

#id_from_object_procObject (readonly)

Returns the value of attribute id_from_object_proc


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

def id_from_object_proc
  @id_from_object_proc
end

#instrumentersObject

Returns the value of attribute instrumenters


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# File 'lib/graphql/schema.rb', line 196

def instrumenters
  @instrumenters
end

#interpreter=(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 307

def interpreter=(value)
  @interpreter = value
end

#introspection_namespaceObject

Returns the value of attribute introspection_namespace


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# File 'lib/graphql/schema.rb', line 196

def introspection_namespace
  @introspection_namespace
end

#lazy_methodsObject

Returns the value of attribute lazy_methods


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# File 'lib/graphql/schema.rb', line 196

def lazy_methods
  @lazy_methods
end

#max_complexityObject

Returns the value of attribute max_complexity


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# File 'lib/graphql/schema.rb', line 196

def max_complexity
  @max_complexity
end

#max_depthObject

Returns the value of attribute max_depth


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# File 'lib/graphql/schema.rb', line 196

def max_depth
  @max_depth
end

#middlewareMiddlewareChain

Returns MiddlewareChain which is applied to fields during execution.

Returns:

  • (MiddlewareChain)

    MiddlewareChain which is applied to fields during execution


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# File 'lib/graphql/schema.rb', line 216

def middleware
  @middleware
end

#multiplex_analyzersObject

Returns the value of attribute multiplex_analyzers


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# File 'lib/graphql/schema.rb', line 196

def multiplex_analyzers
  @multiplex_analyzers
end

#mutationObject

Returns the value of attribute mutation


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# File 'lib/graphql/schema.rb', line 196

def mutation
  @mutation
end

#mutation_execution_strategyObject

Returns the value of attribute mutation_execution_strategy


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# File 'lib/graphql/schema.rb', line 196

def mutation_execution_strategy
  @mutation_execution_strategy
end

#object_from_id_procObject (readonly)

Returns the value of attribute object_from_id_proc


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

def object_from_id_proc
  @object_from_id_proc
end

#orphan_typesObject

Returns the value of attribute orphan_types


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# File 'lib/graphql/schema.rb', line 196

def orphan_types
  @orphan_types
end

#queryObject

Returns the value of attribute query


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# File 'lib/graphql/schema.rb', line 196

def query
  @query
end

#query_analyzersObject

Returns the value of attribute query_analyzers


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# File 'lib/graphql/schema.rb', line 196

def query_analyzers
  @query_analyzers
end

#query_execution_strategyObject

Returns the value of attribute query_execution_strategy


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# File 'lib/graphql/schema.rb', line 196

def query_execution_strategy
  @query_execution_strategy
end

#raise_definition_errorObject

Returns the value of attribute raise_definition_error


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# File 'lib/graphql/schema.rb', line 196

def raise_definition_error
  @raise_definition_error
end

#resolve_type_procObject (readonly)

Returns the value of attribute resolve_type_proc


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

def resolve_type_proc
  @resolve_type_proc
end

#static_validatorObject (readonly)

Returns the value of attribute static_validator


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

def static_validator
  @static_validator
end

#subscriptionObject

Returns the value of attribute subscription


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# File 'lib/graphql/schema.rb', line 196

def subscription
  @subscription
end

#subscription_execution_strategyObject

Returns the value of attribute subscription_execution_strategy


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# File 'lib/graphql/schema.rb', line 196

def subscription_execution_strategy
  @subscription_execution_strategy
end

#subscriptionsGraphQL::Subscriptions

Single, long-lived instance of the provided subscriptions class, if there is one.


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# File 'lib/graphql/schema.rb', line 213

def subscriptions
  @subscriptions
end

#tracersArray<#trace(key, data)> (readonly)

Returns Tracers applied to every query.

Returns:

  • (Array<#trace(key, data)>)

    Tracers applied to every query

See Also:

  • for query-specific tracers

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# File 'lib/graphql/schema.rb', line 257

def tracers
  @tracers
end

Class Method Details

.accessible?(member, ctx) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 1455

def accessible?(member, ctx)
  member.type_class.accessible?(ctx)
end

.add_subscription_extension_if_necessaryObject

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 1662

def add_subscription_extension_if_necessary
  if interpreter? && !defined?(@subscription_extension_added) && subscription && self.subscriptions
    @subscription_extension_added = true
    if subscription.singleton_class.ancestors.include?(Subscriptions::SubscriptionRoot)
      warn("`extend Subscriptions::SubscriptionRoot` is no longer required; you may remove it from #{self}'s `subscription` root type (#{subscription}).")
    else
      subscription.fields.each do |name, field|
        field.extension(Subscriptions::DefaultSubscriptionResolveExtension)
      end
    end
  end
end

.as_json(only: nil, except: nil, context: {}) ⇒ Hash

Return the Hash response of Introspection::INTROSPECTION_QUERY.

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>) (defaults to: nil)
  • except (<#call(member, ctx)>) (defaults to: nil)

Returns:

  • (Hash)

    GraphQL result


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# File 'lib/graphql/schema.rb', line 882

def as_json(only: nil, except: nil, context: {})
  execute(Introspection.query(include_deprecated_args: true), only: only, except: except, context: context).to_h
end

.context_class(new_context_class = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1385

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

.cursor_encoder(new_encoder = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1231

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

.default_directivesObject


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# File 'lib/graphql/schema.rb', line 1561

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

.default_filterObject


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# File 'lib/graphql/schema.rb', line 913

def default_filter
  GraphQL::Filter.new(except: default_mask)
end

.default_mask(new_mask = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 917

def default_mask(new_mask = nil)
  if new_mask
    @own_default_mask = new_mask
  else
    @own_default_mask || find_inherited_value(:default_mask, Schema::NullMask)
  end
end

.default_max_page_size(new_default_max_page_size = nil) ⇒ Object


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

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

.directive(new_directive) ⇒ Object

Attach a single directive to this schema

Parameters:

  • new_directive (Class)

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

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

.directives(*new_directives) ⇒ Object

Add several directives at once

Parameters:

  • new_directives (Class)

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# File 'lib/graphql/schema.rb', line 1546

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

  find_inherited_value(:directives, default_directives).merge(own_directives)
end

.disable_introspection_entry_pointsObject


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# File 'lib/graphql/schema.rb', line 1324

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 1342

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_pointObject


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# File 'lib/graphql/schema.rb', line 1330

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 1350

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_pointObject


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# File 'lib/graphql/schema.rb', line 1336

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 1358

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

.execute(query_str = nil, **kwargs) ⇒ Hash

Execute a query on itself.

Returns:

  • (Hash)

    query result, ready to be serialized as JSON

See Also:

  • for arguments.

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

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],
    }
  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

.find(path) ⇒ Object


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# File 'lib/graphql/schema.rb', line 901

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, interpreter: true, parser: BuildFromDefinition::DefaultParser, 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: BuildFromDefinition::DefaultParser)

    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)

  • interpreter (Boolean) (defaults to: true)

    If false, the legacy Execution::Execute runtime will be used

Returns:

  • (Class)

    the schema described by document


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# File 'lib/graphql/schema.rb', line 792

def self.from_definition(definition_or_path, default_resolve: nil, interpreter: true, parser: BuildFromDefinition::DefaultParser, using: {})
  # If the file ends in `.graphql`, treat it like a filepath
  definition = if definition_or_path.end_with?(".graphql")
    File.read(definition_or_path)
  else
    definition_or_path
  end
  GraphQL::Schema::BuildFromDefinition.from_definition(
    definition,
    default_resolve: default_resolve,
    parser: parser,
    using: using,
    interpreter: interpreter,
  )
end

.from_introspection(introspection_result) ⇒ GraphQL::Schema

Create schema with the result of an introspection query.

Parameters:

Returns:


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# File 'lib/graphql/schema.rb', line 781

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

.get_field(type_or_name, field_name) ⇒ Object


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

def get_field(type_or_name, field_name)
  parent_type = case type_or_name
  when LateBoundType
    get_type(type_or_name.name)
  when String
    get_type(type_or_name)
  when Module
    type_or_name
  else
    raise ArgumentError, "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))
    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) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1209

def get_fields(type)
  type.fields
end

.get_type(type_name) ⇒ Module?

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

Parameters:

  • type_name (String)

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 1015

def get_type(type_name)
  own_types[type_name] ||
    introspection_system.types[type_name] ||
    find_inherited_value(:types, EMPTY_HASH)[type_name]
end

.graphql_definitionObject


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# File 'lib/graphql/schema.rb', line 909

def graphql_definition
  @graphql_definition ||= to_graphql
end

.id_from_object(object, type, ctx) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1447

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

.inaccessible_fields(error) ⇒ AnalysisError?

This hook is called when a client tries to access one or more fields that fail the accessible? check.

By default, an error is added to the response. Override this hook to track metrics or return a different error to the client.

Parameters:

  • error (InaccessibleFieldsError)

    The analysis error for this check

Returns:


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# File 'lib/graphql/schema.rb', line 1467

def inaccessible_fields(error)
  error
end

.inherited(child_class) ⇒ Object

rubocop:enable Lint/DuplicateMethods


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# File 'lib/graphql/schema.rb', line 1431

def inherited(child_class)
  if self == GraphQL::Schema
    child_class.directives(default_directives.values)
  end
  child_class.singleton_class.prepend(ResolveTypeWithType)
  super
end

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


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# File 'lib/graphql/schema.rb', line 1534

def instrument(instrument_step, instrumenter, options = {})
  step = if instrument_step == :field && options[:after_built_ins]
    :field_after_built_ins
  else
    instrument_step
  end

  own_instrumenters[step] << instrumenter
end

.instrumentersObject


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# File 'lib/graphql/schema.rb', line 1654

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

.interpreter?Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 1292

def interpreter?
  if defined?(@interpreter)
    @interpreter
  else
    find_inherited_value(:interpreter?, false)
  end
end

.introspection(new_introspection_namespace = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1213

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

.introspection_systemObject


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# File 'lib/graphql/schema.rb', line 1223

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

.lazy_resolve(lazy_class, value_method) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1530

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

.middleware(new_middleware = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1588

def middleware(new_middleware = nil)
  if new_middleware
    own_middleware << new_middleware
  else
    # TODO make sure this is cached when running a query
    MiddlewareChain.new(steps: all_middleware, final_step: GraphQL::Execution::Execute::FieldResolveStep)
  end
end

.multiplex(queries, **kwargs) ⇒ Array<Hash>

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:

  • (Array<Hash>)

    One result for each query in the input

See Also:

  • for query keyword arguments
  • for multiplex keyword arguments

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# File 'lib/graphql/schema.rb', line 1645

def multiplex(queries, **kwargs)
  schema = if interpreter?
    self
  else
    graphql_definition
  end
  GraphQL::Execution::Multiplex.run_all(schema, queries, **kwargs)
end

.multiplex_analyzer(new_analyzer) ⇒ Object


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

def multiplex_analyzer(new_analyzer)
  own_multiplex_analyzers << new_analyzer
end

.multiplex_analyzersObject


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# File 'lib/graphql/schema.rb', line 1601

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

.mutation(new_mutation_object = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1058

def mutation(new_mutation_object = nil)
  if new_mutation_object
    if @mutation_object
      raise GraphQL::Error, "Second definition of `mutation(...)` (#{new_mutation_object.inspect}) is invalid, already configured with #{@mutation_object.inspect}"
    else
      @mutation_object = new_mutation_object
      add_type_and_traverse(new_mutation_object, root: true)
      nil
    end
  else
    @mutation_object || find_inherited_value(:mutation)
  end
end

.mutation_execution_strategy(new_mutation_execution_strategy = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1254

def mutation_execution_strategy(new_mutation_execution_strategy = nil)
  if new_mutation_execution_strategy
    @mutation_execution_strategy = new_mutation_execution_strategy
  else
    @mutation_execution_strategy || find_inherited_value(:mutation_execution_strategy, self.default_execution_strategy)
  end
end

.new_connections?Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 1040

def new_connections?
  !!connections
end

.object_from_id(node_id, ctx) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1443

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

.orphan_types(*new_orphan_types) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1366

def orphan_types(*new_orphan_types)
  if new_orphan_types.any?
    new_orphan_types = new_orphan_types.flatten
    add_type_and_traverse(new_orphan_types, root: false)
    @orphan_types = new_orphan_types
    own_orphan_types.concat(new_orphan_types.flatten)
  end

  find_inherited_value(:orphan_types, EMPTY_ARRAY) + own_orphan_types
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 1516

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

.pluginsObject


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

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

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

Parameters:

  • type (Module) (defaults to: nil)

    The type definition whose possible types you want to see

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 1109

def possible_types(type = nil, context = GraphQL::Query::NullContext)
  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.graphql_name]
      visible_possible_types = stored_possible_types.select do |possible_type|
        next true unless type.kind.interface?
        next true unless possible_type.kind.object?

        # Use `.graphql_name` comparison to match legacy vs class-based types.
        # When we don't need to support legacy `.define` types, use `.include?(type)` instead.
        possible_type.interfaces(context).any? { |interface| interface.graphql_name == type.graphql_name }
      end if stored_possible_types
      visible_possible_types ||
        introspection_system.possible_types[type.graphql_name] ||
        (
          superclass.respond_to?(:possible_types) ?
            superclass.possible_types(type, context) :
            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) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1044

def query(new_query_object = nil)
  if new_query_object
    if @query_object
      raise GraphQL::Error, "Second definition of `query(...)` (#{new_query_object.inspect}) is invalid, already configured with #{@query_object.inspect}"
    else
      @query_object = new_query_object
      add_type_and_traverse(new_query_object, root: true)
      nil
    end
  else
    @query_object || find_inherited_value(:query)
  end
end

.query_analyzer(new_analyzer) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1577

def query_analyzer(new_analyzer)
  if new_analyzer == GraphQL::Authorization::Analyzer
    warn("The Authorization query analyzer is deprecated. Authorizing at query runtime is generally a better idea.")
  end
  own_query_analyzers << new_analyzer
end

.query_analyzersObject


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# File 'lib/graphql/schema.rb', line 1584

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

.query_execution_strategy(new_query_execution_strategy = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1246

def query_execution_strategy(new_query_execution_strategy = nil)
  if new_query_execution_strategy
    @query_execution_strategy = new_query_execution_strategy
  else
    @query_execution_strategy || find_inherited_value(:query_execution_strategy, self.default_execution_strategy)
  end
end

.query_stack_error(query, err) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1675

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 1154

def references_to(to_type = nil, from: nil)
  @own_references_to ||= Hash.new { |h, k| h[k] = [] }
  if to_type
    if !to_type.is_a?(String)
      to_type = to_type.graphql_name
    end

    if from
      @own_references_to[to_type] << from
    else
      own_refs = @own_references_to[to_type]
      inherited_refs = find_inherited_value(:references_to, EMPTY_HASH)[to_type] || EMPTY_ARRAY
      own_refs + inherited_refs
    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.any?
      inherited_value.merge(@own_references_to)
    else
      @own_references_to
    end
  end
end

.rescue_from(*err_classes, &handler_block) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1393

def rescue_from(*err_classes, &handler_block)
  err_classes.each do |err_class|
    own_rescues[err_class] = handler_block
  end
end

.rescuesObject


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# File 'lib/graphql/schema.rb', line 1439

def rescues
  find_inherited_value(:rescues, EMPTY_HASH).merge(own_rescues)
end

.resolve_type(type, obj, ctx) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1422

def resolve_type(type, obj, ctx)
  if type.kind.object?
    type
  else
    raise GraphQL::RequiredImplementationMissingError, "#{self.name}.resolve_type(type, obj, ctx) must be implemented to use Union types or Interface types (tried to resolve: #{type.name})"
  end
end

.root_type_for_operation(operation) ⇒ GraphQL::ObjectType?

Returns:

See Also:

  • Resticted access to root types

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# File 'lib/graphql/schema.rb', line 1089

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_typesObject


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# File 'lib/graphql/schema.rb', line 1102

def root_types
  @root_types
end

.static_validatorObject


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# File 'lib/graphql/schema.rb', line 925

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

.subscription(new_subscription_object = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1072

def subscription(new_subscription_object = nil)
  if new_subscription_object
    if @subscription_object
      raise GraphQL::Error, "Second definition of `subscription(...)` (#{new_subscription_object.inspect}) is invalid, already configured with #{@subscription_object.inspect}"
    else
      @subscription_object = new_subscription_object
      add_subscription_extension_if_necessary
      add_type_and_traverse(new_subscription_object, root: true)
      nil
    end
  else
    @subscription_object || find_inherited_value(:subscription)
  end
end

.subscription_execution_strategy(new_subscription_execution_strategy = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1262

def subscription_execution_strategy(new_subscription_execution_strategy = nil)
  if new_subscription_execution_strategy
    @subscription_execution_strategy = new_subscription_execution_strategy
  else
    @subscription_execution_strategy || find_inherited_value(:subscription_execution_strategy, self.default_execution_strategy)
  end
end

.to_definition(only: nil, except: nil, context: {}) ⇒ String

Return the GraphQL IDL for the schema

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>) (defaults to: nil)
  • except (<#call(member, ctx)>) (defaults to: nil)

Returns:

  • (String)

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# File 'lib/graphql/schema.rb', line 891

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

.to_documentGraphQL::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 897

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

.to_graphqlObject


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# File 'lib/graphql/schema.rb', line 942

def to_graphql
  schema_defn = self.new
  schema_defn.raise_definition_error = true
  schema_defn.query = query && query.graphql_definition
  schema_defn.mutation = mutation && mutation.graphql_definition
  schema_defn.subscription = subscription && subscription.graphql_definition
  schema_defn.max_complexity = max_complexity
  schema_defn.error_bubbling = error_bubbling
  schema_defn.max_depth = max_depth
  schema_defn.default_max_page_size = default_max_page_size
  schema_defn.orphan_types = orphan_types.map(&:graphql_definition)
  schema_defn.disable_introspection_entry_points = disable_introspection_entry_points?
  schema_defn.disable_schema_introspection_entry_point = disable_schema_introspection_entry_point?
  schema_defn.disable_type_introspection_entry_point = disable_type_introspection_entry_point?

  prepped_dirs = {}
  directives.each { |k, v| prepped_dirs[k] = v.graphql_definition}
  schema_defn.directives = prepped_dirs
  schema_defn.introspection_namespace = introspection
  schema_defn.resolve_type = method(:resolve_type)
  schema_defn.object_from_id = method(:object_from_id)
  schema_defn.id_from_object = method(:id_from_object)
  schema_defn.type_error = method(:type_error)
  schema_defn.context_class = context_class
  schema_defn.cursor_encoder = cursor_encoder
  schema_defn.tracers.concat(tracers)
  schema_defn.query_analyzers.concat(query_analyzers)
  schema_defn.analysis_engine = analysis_engine

  schema_defn.middleware.concat(all_middleware)
  schema_defn.multiplex_analyzers.concat(multiplex_analyzers)
  schema_defn.query_execution_strategy = query_execution_strategy
  schema_defn.mutation_execution_strategy = mutation_execution_strategy
  schema_defn.subscription_execution_strategy = subscription_execution_strategy
  schema_defn.default_mask = default_mask
  instrumenters.each do |step, insts|
    insts.each do |inst|
      schema_defn.instrumenters[step] << inst
    end
  end

  lazy_methods.each do |lazy_class, value_method|
    schema_defn.lazy_methods.set(lazy_class, value_method)
  end

  rescues.each do |err_class, handler|
    schema_defn.rescue_from(err_class, &handler)
  end

  schema_defn.subscriptions ||= self.subscriptions

  if !schema_defn.interpreter?
    schema_defn.instrumenters[:query] << GraphQL::Schema::Member::Instrumentation
  end

  if new_connections?
    schema_defn.connections = self.connections
  end

  schema_defn.send(:rebuild_artifacts)

  schema_defn
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 873

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

.tracer(new_tracer) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1569

def tracer(new_tracer)
  own_tracers << new_tracer
end

.tracersObject


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

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

.type_error(type_err, ctx) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1506

def type_error(type_err, ctx)
  DefaultTypeError.call(type_err, ctx)
end

.type_from_ast(ast_node, context: nil) ⇒ Object


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

def type_from_ast(ast_node, context: nil)
  type_owner = context ? context.warden : self
  GraphQL::Schema::TypeExpression.build_type(type_owner, ast_node)
end

.typesHash<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 1009

def types
  non_introspection_types.merge(introspection_system.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 1502

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 1486

def unauthorized_object(unauthorized_error)
  nil
end

.union_memberships(type = nil) ⇒ Object


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# File 'lib/graphql/schema.rb', line 1139

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


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# File 'lib/graphql/schema.rb', line 929

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

.using_ast_analysis?Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 1288

def using_ast_analysis?
  analysis_engine == GraphQL::Analysis::AST
end

.visible?(member, ctx) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 1451

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

Instance Method Details

#accessible?(member, context) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 741

def accessible?(member, context)
  call_on_type_class(member, :accessible?, context, default: true)
end

#as_json(only: nil, except: nil, context: {}) ⇒ Hash

Return the Hash response of Introspection::INTROSPECTION_QUERY.

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>) (defaults to: nil)
  • except (<#call(member, ctx)>) (defaults to: nil)

Returns:

  • (Hash)

    GraphQL result


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# File 'lib/graphql/schema.rb', line 834

def as_json(only: nil, except: nil, context: {})
  execute(Introspection.query(include_deprecated_args: true), only: only, except: except, context: context).to_h
end

#call_on_type_class(member, method_name, context, default:) ⇒ Object

Given this schema member, find the class-based definition object whose method_name should be treated as an application hook

See Also:

  • GraphQL::Schema.{{.visible?}
  • GraphQL::Schema.{{.accessible?}

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# File 'lib/graphql/schema.rb', line 719

def call_on_type_class(member, method_name, context, default:)
  member = if member.respond_to?(:type_class)
    member.type_class
  else
    member
  end

  if member.respond_to?(:relay_node_type) && (t = member.relay_node_type)
    member = t
  end

  if member.respond_to?(method_name)
    member.public_send(method_name, context)
  else
    default
  end
end

#check_resolved_type(type, object, ctx = :__undefined__) ⇒ 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.

This is a compatibility hack so that instance-level and class-level methods can get correctness checks without calling one another


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# File 'lib/graphql/schema.rb', line 616

def check_resolved_type(type, object, ctx = :__undefined__)
  if ctx == :__undefined__
    # Old method signature
    ctx = object
    object = type
    type = nil
  end

  if object.is_a?(GraphQL::Schema::Object)
    object = object.object
  end

  if type.respond_to?(:graphql_definition)
    type = type.graphql_definition
  end

  # Prefer a type-local function; fall back to the schema-level function
  type_proc = type && type.resolve_type_proc
  type_result = if type_proc
    type_proc.call(object, ctx)
  else
    yield(type, object, ctx)
  end

  if type_result.nil?
    nil
  else
    after_lazy(type_result) do |resolved_type_result|
      if resolved_type_result.respond_to?(:graphql_definition)
        resolved_type_result = resolved_type_result.graphql_definition
      end
      if !resolved_type_result.is_a?(GraphQL::BaseType)
        type_str = "#{resolved_type_result} (#{resolved_type_result.class.name})"
        raise "resolve_type(#{object}) returned #{type_str}, but it should return a GraphQL type"
      else
        resolved_type_result
      end
    end
  end
end

#default_filterObject


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# File 'lib/graphql/schema.rb', line 251

def default_filter
  GraphQL::Filter.new(except: default_mask)
end

#define(**kwargs, &block) ⇒ Object


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# File 'lib/graphql/schema.rb', line 373

def define(**kwargs, &block)
  super
  ensure_defined
  # Assert that all necessary configs are present:
  validation_error = Validation.validate(self)
  validation_error && raise(GraphQL::RequiredImplementationMissingError, validation_error)
  rebuild_artifacts

  @definition_error = nil
  nil
rescue StandardError => err
  if @raise_definition_error || err.is_a?(CyclicalDefinitionError) || err.is_a?(GraphQL::RequiredImplementationMissingError)
    raise
  else
    # Raise this error _later_ to avoid messing with Rails constant loading
    @definition_error = err
  end
  nil
end

#disable_introspection_entry_points?Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 229

def disable_introspection_entry_points?
  !!@disable_introspection_entry_points
end

#disable_schema_introspection_entry_point?Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 236

def disable_schema_introspection_entry_point?
  !!@disable_schema_introspection_entry_point
end

#disable_type_introspection_entry_point?Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 243

def disable_type_introspection_entry_point?
  !!@disable_type_introspection_entry_point
end

#execute(query_str = nil, **kwargs) ⇒ Hash

Execute a query on itself. Raises an error if the schema definition is invalid.

Returns:

  • (Hash)

    query result, ready to be serialized as JSON

See Also:

  • for arguments.

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# File 'lib/graphql/schema.rb', line 456

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],
    }
  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

#execution_strategy_for_operation(operation) ⇒ Object


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# File 'lib/graphql/schema.rb', line 584

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

#find(path) ⇒ GraphQL::BaseType, ...

Search for a schema member using a string path Schema.find("Ensemble.musicians")

Examples:

Finding a Field

Parameters:

  • path (String)

    A dot-separated path to the member

Returns:

Raises:

See Also:

  • for more examples

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# File 'lib/graphql/schema.rb', line 506

def find(path)
  rebuild_artifacts unless defined?(@finder)
  @find_cache[path] ||= @finder.find(path)
end

#get_field(parent_type, field_name) ⇒ GraphQL::Field?

Resolve field named field_name for type parent_type. Handles dynamic fields __typename, __type and __schema, too

Parameters:

Returns:

See Also:

  • Restricted access to members of a schema

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# File 'lib/graphql/schema.rb', line 517

def get_field(parent_type, field_name)
  with_definition_error_check do
    parent_type_name = case parent_type
    when GraphQL::BaseType, Class, Module
      parent_type.graphql_name
    when String
      parent_type
    else
      raise "Unexpected parent_type: #{parent_type}"
    end

    defined_field = @instrumented_field_map[parent_type_name][field_name]
    if defined_field
      defined_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
end

#get_fields(type) ⇒ Hash<String, GraphQL::Field>

Fields for this type, after instrumentation is applied

Returns:


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# File 'lib/graphql/schema.rb', line 543

def get_fields(type)
  @instrumented_field_map[type.graphql_name]
end

#get_type(type_name) ⇒ Object


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# File 'lib/graphql/schema.rb', line 421

def get_type(type_name)
  @types[type_name]
end

#id_from_object(object, type, ctx) ⇒ String

Get a unique identifier from this object

Parameters:

Returns:

  • (String)

    a unique identifier for object which clients can use to refetch it


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# File 'lib/graphql/schema.rb', line 765

def id_from_object(object, type, ctx)
  if @id_from_object_proc.nil?
    raise(GraphQL::RequiredImplementationMissingError, "Can't generate an ID for #{object.inspect} of type #{type}, schema's `id_from_object` must be defined")
  else
    @id_from_object_proc.call(object, type, ctx)
  end
end

#id_from_object=(new_proc) ⇒ Object

Parameters:

  • new_proc (#call)

    A new callable for generating unique IDs


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# File 'lib/graphql/schema.rb', line 774

def id_from_object=(new_proc)
  @id_from_object_proc = new_proc
end

#initialize_copy(other) ⇒ Object


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# File 'lib/graphql/schema.rb', line 313

def initialize_copy(other)
  super
  @orphan_types = other.orphan_types.dup
  @directives = other.directives.dup
  @static_validator = GraphQL::StaticValidation::Validator.new(schema: self)
  @middleware = other.middleware.dup
  @query_analyzers = other.query_analyzers.dup
  @multiplex_analyzers = other.multiplex_analyzers.dup
  @tracers = other.tracers.dup
  @possible_types = GraphQL::Schema::PossibleTypes.new(self)

  @lazy_methods = other.lazy_methods.dup

  @instrumenters = Hash.new { |h, k| h[k] = [] }
  other.instrumenters.each do |key, insts|
    @instrumenters[key].concat(insts)
  end

  if other.rescues?
    @rescue_middleware = other.rescue_middleware
  end

  # This will be rebuilt when it's requested
  # or during a later `define` call
  @types = nil
  @introspection_system = nil
end

#inspectObject


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# File 'lib/graphql/schema.rb', line 309

def inspect
  "#<#{self.class.name} ...>"
end

#instrument(instrumentation_type, instrumenter) ⇒ void

This method returns an undefined value.

Attach instrumenter to this schema for instrumenting events of instrumentation_type.

Parameters:

  • instrumentation_type (Symbol)
  • instrumenter

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# File 'lib/graphql/schema.rb', line 397

def instrument(instrumentation_type, instrumenter)
  @instrumenters[instrumentation_type] << instrumenter
  if instrumentation_type == :field
    rebuild_artifacts
  end
end

#interpreter?Boolean

Returns True if using the new Execution::Interpreter.

Returns:


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# File 'lib/graphql/schema.rb', line 302

def interpreter?
  @interpreter
end

#introspection_systemObject

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 426

def introspection_system
  @introspection_system ||= begin
    rebuild_artifacts
    @introspection_system
  end
end

#multiplex(queries, **kwargs) ⇒ Array<Hash>

Execute several queries on itself. Raises an error if the schema definition is invalid.

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:

  • (Array<Hash>)

    One result for each query in the input

See Also:

  • for query keyword arguments
  • for multiplex keyword arguments

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# File 'lib/graphql/schema.rb', line 492

def multiplex(queries, **kwargs)
  with_definition_error_check {
    GraphQL::Execution::Multiplex.run_all(self, queries, **kwargs)
  }
end

#new_connections?Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 845

def new_connections?
  !!connections
end

#object_from_id(id, ctx) ⇒ Any

Fetch an application object by its unique id

Parameters:

  • id (String)

    A unique identifier, provided previously by this GraphQL schema

  • ctx (GraphQL::Query::Context)

    The context for the current query

Returns:

  • (Any)

    The application object identified by id


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# File 'lib/graphql/schema.rb', line 666

def object_from_id(id, ctx)
  if @object_from_id_proc.nil?
    raise(GraphQL::RequiredImplementationMissingError, "Can't fetch an object for id \"#{id}\" because the schema's `object_from_id (id, ctx) -> { ... }` function is not defined")
  else
    @object_from_id_proc.call(id, ctx)
  end
end

#object_from_id=(new_proc) ⇒ Object

Parameters:

  • new_proc (#call)

    A new callable for fetching objects by ID


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# File 'lib/graphql/schema.rb', line 675

def object_from_id=(new_proc)
  @object_from_id_proc = new_proc
end

#parse_error(err, ctx) ⇒ Object

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

Parameters:

Returns:

  • void

See Also:

  • is the default behavior.

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# File 'lib/graphql/schema.rb', line 751

def parse_error(err, ctx)
  @parse_error_proc.call(err, ctx)
end

#parse_error=(new_proc) ⇒ Object

Parameters:

  • new_proc (#call)

    A new callable for handling parse errors during execution


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# File 'lib/graphql/schema.rb', line 756

def parse_error=(new_proc)
  @parse_error_proc = new_proc
end

#possible_types(type_defn, context = GraphQL::Query::NullContext) ⇒ Array<GraphQL::ObjectType>

Returns types which belong to type_defn in this schema.

Parameters:

Returns:

See Also:

  • Restricted access to members of a schema

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# File 'lib/graphql/schema.rb', line 555

def possible_types(type_defn, context = GraphQL::Query::NullContext)
  if context == GraphQL::Query::NullContext
    @possible_types ||= GraphQL::Schema::PossibleTypes.new(self)
    @possible_types.possible_types(type_defn, context)
  else
    # Use the incoming context to cache this instance --
    # if it were cached on the schema, we'd have a memory leak
    # https://github.com/rmosolgo/graphql-ruby/issues/2878
    ns = context.namespace(:possible_types)
    per_query_possible_types = ns[:possible_types] ||= GraphQL::Schema::PossibleTypes.new(self)
    per_query_possible_types.possible_types(type_defn, context)
  end
end

#references_to(type_name = nil) ⇒ Hash

Returns a list of Arguments and Fields referencing a certain type

Parameters:

  • type_name (String) (defaults to: nil)

Returns:

  • (Hash)

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# File 'lib/graphql/schema.rb', line 436

def references_to(type_name = nil)
  rebuild_artifacts unless defined?(@type_reference_map)
  if type_name
    @type_reference_map.fetch(type_name, [])
  else
    @type_reference_map
  end
end

#remove_handler(*args, &block) ⇒ Object


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# File 'lib/graphql/schema.rb', line 345

def remove_handler(*args, &block)
  rescue_middleware.remove_handler(*args, &block)
end

#rescue_from(*args, &block) ⇒ Object


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# File 'lib/graphql/schema.rb', line 341

def rescue_from(*args, &block)
  rescue_middleware.rescue_from(*args, &block)
end

#resolve_type(type, object, ctx = :__undefined__) ⇒ GraphQL::ObjectType

Determine the GraphQL type for a given object. This is required for unions and interfaces (including Relay's Node interface)

Parameters:

  • type (GraphQL::UnionType, GraphQL:InterfaceType)

    the abstract type which is being resolved

  • object (Any)

    An application object which GraphQL is currently resolving on

  • ctx (GraphQL::Query::Context) (defaults to: :__undefined__)

    The context for the current query

Returns:

See Also:

  • Restricted access to members of a schema

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# File 'lib/graphql/schema.rb', line 604

def resolve_type(type, object, ctx = :__undefined__)
  check_resolved_type(type, object, ctx) do |ok_type, ok_object, ok_ctx|
    if @resolve_type_proc.nil?
      raise(GraphQL::RequiredImplementationMissingError, "Can't determine GraphQL type for: #{ok_object.inspect}, define `resolve_type (type, obj, ctx) -> { ... }` inside `Schema.define`.")
    end
    @resolve_type_proc.call(ok_type, ok_object, ok_ctx)
  end
end

#resolve_type=(new_resolve_type_proc) ⇒ Object


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# File 'lib/graphql/schema.rb', line 657

def resolve_type=(new_resolve_type_proc)
  callable = GraphQL::BackwardsCompatibility.wrap_arity(new_resolve_type_proc, from: 2, to: 3, last: true, name: "Schema#resolve_type(type, obj, ctx)")
  @resolve_type_proc = callable
end

#root_type_for_operation(operation) ⇒ GraphQL::ObjectType?

Returns:

See Also:

  • Resticted access to root types

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# File 'lib/graphql/schema.rb', line 571

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_typesArray<GraphQL::BaseType>

Returns The root types of this schema.

Returns:


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# File 'lib/graphql/schema.rb', line 405

def root_types
  @root_types ||= begin
    rebuild_artifacts
    @root_types
  end
end

#to_definition(only: nil, except: nil, context: {}) ⇒ String

Return the GraphQL IDL for the schema

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>) (defaults to: nil)
  • except (<#call(member, ctx)>) (defaults to: nil)

Returns:

  • (String)

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# File 'lib/graphql/schema.rb', line 816

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

#to_document(only: nil, except: nil, context: {}) ⇒ GraphQL::Language::Document

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

Parameters:

  • context (Hash) (defaults to: {})
  • only (<#call(member, ctx)>) (defaults to: nil)
  • except (<#call(member, ctx)>) (defaults to: nil)

Returns:

  • (GraphQL::Language::Document)

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# File 'lib/graphql/schema.rb', line 825

def to_document(only: nil, except: nil, context: {})
  GraphQL::Language::DocumentFromSchemaDefinition.new(self, only: only, except: except, context: context).document
end

#to_json(*args) ⇒ String

Returns the JSON response of Introspection::INTROSPECTION_QUERY.

Returns:

  • (String)

See Also:

  • GraphQL::Schema.{{#as_json}

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# File 'lib/graphql/schema.rb', line 841

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

#type_error(err, ctx) ⇒ Object

When we encounter a type error during query execution, we call this hook.

You can use this hook to write a log entry, add a ExecutionError to the response (with ctx.add_error) or raise an exception and halt query execution.

Examples:

A nil is encountered by a non-null field

type_error ->(err, query_ctx) {
  err.is_a?(GraphQL::InvalidNullError) # => true
}

An object doesn't resolve to one of a UnionType's members

type_error ->(err, query_ctx) {
  err.is_a?(GraphQL::UnresolvedTypeError) # => true
}

Parameters:

  • err (GraphQL::TypeError)

    The error encountered during execution

  • ctx (GraphQL::Query::Context)

    The context for the field where the error occurred

Returns:

  • void

See Also:

  • is the default behavior.

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# File 'lib/graphql/schema.rb', line 699

def type_error(err, ctx)
  @type_error_proc.call(err, ctx)
end

#type_error=(new_proc) ⇒ Object

Parameters:

  • new_proc (#call)

    A new callable for handling type errors during execution


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# File 'lib/graphql/schema.rb', line 704

def type_error=(new_proc)
  @type_error_proc = new_proc
end

#type_from_ast(ast_node, context:) ⇒ Object


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# File 'lib/graphql/schema.rb', line 547

def type_from_ast(ast_node, context:)
  GraphQL::Schema::TypeExpression.build_type(self, ast_node)
end

#typesGraphQL::Schema::TypeMap

Returns { name => type } pairs of types in this schema.

Returns:

  • (GraphQL::Schema::TypeMap)

    { name => type } pairs of types in this schema

See Also:

  • Restricted access to members of a schema

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

def types
  @types ||= begin
    rebuild_artifacts
    @types
  end
end

#union_memberships(type) ⇒ Array<GraphQL::UnionType>

Returns a list of Union types in which a type is a member

Parameters:

Returns:


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# File 'lib/graphql/schema.rb', line 448

def union_memberships(type)
  rebuild_artifacts unless defined?(@union_memberships)
  @union_memberships.fetch(type.name, [])
end

#using_ast_analysis?Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 349

def using_ast_analysis?
  @analysis_engine == GraphQL::Analysis::AST
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 359

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 = GraphQL::Query.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)
  res[:errors]
end

#visible?(member, context) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/graphql/schema.rb', line 737

def visible?(member, context)
  call_on_type_class(member, :visible?, context, default: true)
end