Class: GraphQL::Schema

Inherits:
Object
  • Object
show all
Extended by:
Forwardable, Member::AcceptsDefinition
Includes:
Define::InstanceDefinable
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/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/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/member/scoped.rb,
lib/graphql/schema/built_in_types.rb,
lib/graphql/schema/possible_types.rb,
lib/graphql/schema/base_64_encoder.rb,
lib/graphql/schema/late_bound_type.rb,
lib/graphql/schema/member/has_path.rb,
lib/graphql/schema/type_expression.rb,
lib/graphql/schema/middleware_chain.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/introspection_system.rb,
lib/graphql/schema/member/has_arguments.rb,
lib/graphql/schema/build_from_definition.rb,
lib/graphql/schema/member/instrumentation.rb,
lib/graphql/schema/member/relay_shortcuts.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/member/type_system_helpers.rb,
lib/graphql/schema/member/cached_graphql_definition.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, Interface, Loader, MethodWrappers, NullMask, TypeExpression, UniqueWithinType Classes: Argument, CyclicalDefinitionError, Enum, EnumValue, Field, Finder, InputObject, IntrospectionSystem, InvalidDocumentError, InvalidTypeError, LateBoundType, List, Member, MiddlewareChain, Mutation, NonNull, Object, PossibleTypes, Printer, RelayClassicMutation, RescueMiddleware, Resolver, Scalar, TimeoutMiddleware, Traversal, Union, Validation, Warden, Wrapper

Constant Summary collapse

DIRECTIVES = 
[GraphQL::Directive::IncludeDirective, GraphQL::Directive::SkipDirective, GraphQL::Directive::DeprecatedDirective]
DYNAMIC_FIELDS = 
["__type", "__typename", "__schema"]
Context = 
GraphQL::Query::Context
BUILT_IN_TYPES = 
{
  "Int" => INT_TYPE,
  "String" => STRING_TYPE,
  "Float" => FLOAT_TYPE,
  "Boolean" => BOOLEAN_TYPE,
  "ID" => ID_TYPE,
}

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Define::InstanceDefinable

#metadata, #redefine

Constructor Details

#initialize ⇒ Schema

Returns a new instance of Schema.



144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
 
# File 'lib/graphql/schema.rb', line 144

def initialize
  @tracers = []
  @definition_error = nil
  @orphan_types = []
  @directives = DIRECTIVES.reduce({}) { |m, d| m[d.name] = d; m }
  @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:
  @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
end

Class Attribute Details

.default_execution_strategy ⇒ Object 



816
817
818
819
820
821
822
 
# File 'lib/graphql/schema.rb', line 816

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

Instance Attribute Details

#ast_node ⇒ Object

Returns the value of attribute ast_node.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def ast_node
  @ast_node
end

#context_class ⇒ Class

Returns Instantiated for each query.

Returns:

  • (Class) —

    Instantiated for each query

See Also:

  • The parent class of these classes


123
124
125
 
# File 'lib/graphql/schema.rb', line 123

def context_class
  @context_class
end

#cursor_encoder ⇒ Object

Returns the value of attribute cursor_encoder.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

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:`


119
120
121
 
# File 'lib/graphql/schema.rb', line 119

def default_mask
  @default_mask
end

#default_max_page_size ⇒ Object

Returns the value of attribute default_max_page_size.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def default_max_page_size
  @default_max_page_size
end

#directives ⇒ Object

Returns the value of attribute directives.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def directives
  @directives
end

#id_from_object_proc ⇒ Object (readonly)

Returns the value of attribute id_from_object_proc.



142
143
144
 
# File 'lib/graphql/schema.rb', line 142

def id_from_object_proc
  @id_from_object_proc
end

#instrumenters ⇒ Object

Returns the value of attribute instrumenters.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def instrumenters
  @instrumenters
end

#introspection_namespace ⇒ Object

Returns the value of attribute introspection_namespace.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def introspection_namespace
  @introspection_namespace
end

#lazy_methods ⇒ Object

Returns the value of attribute lazy_methods.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def lazy_methods
  @lazy_methods
end

#max_complexity ⇒ Object

Returns the value of attribute max_complexity.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def max_complexity
  @max_complexity
end

#max_depth ⇒ Object

Returns the value of attribute max_depth.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def max_depth
  @max_depth
end

#middleware ⇒ MiddlewareChain

Returns MiddlewareChain which is applied to fields during execution.

Returns:

  • (MiddlewareChain) —

    MiddlewareChain which is applied to fields during execution



115
116
117
 
# File 'lib/graphql/schema.rb', line 115

def middleware
  @middleware
end

#multiplex_analyzers ⇒ Object

Returns the value of attribute multiplex_analyzers.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def multiplex_analyzers
  @multiplex_analyzers
end

#mutation ⇒ Object

Returns the value of attribute mutation.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def mutation
  @mutation
end

#mutation_execution_strategy ⇒ Object

Returns the value of attribute mutation_execution_strategy.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def mutation_execution_strategy
  @mutation_execution_strategy
end

#object_from_id_proc ⇒ Object (readonly)

Returns the value of attribute object_from_id_proc.



142
143
144
 
# File 'lib/graphql/schema.rb', line 142

def object_from_id_proc
  @object_from_id_proc
end

#orphan_types ⇒ Object

Returns the value of attribute orphan_types.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def orphan_types
  @orphan_types
end

#query ⇒ Object

Returns the value of attribute query.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def query
  @query
end

#query_analyzers ⇒ Object

Returns the value of attribute query_analyzers.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def query_analyzers
  @query_analyzers
end

#query_execution_strategy ⇒ Object

Returns the value of attribute query_execution_strategy.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def query_execution_strategy
  @query_execution_strategy
end

#raise_definition_error ⇒ Object

Returns the value of attribute raise_definition_error.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def raise_definition_error
  @raise_definition_error
end

#resolve_type_proc ⇒ Object (readonly)

Returns the value of attribute resolve_type_proc.



142
143
144
 
# File 'lib/graphql/schema.rb', line 142

def resolve_type_proc
  @resolve_type_proc
end

#static_validator ⇒ Object (readonly)

Returns the value of attribute static_validator.



142
143
144
 
# File 'lib/graphql/schema.rb', line 142

def static_validator
  @static_validator
end

#subscription ⇒ Object

Returns the value of attribute subscription.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def subscription
  @subscription
end

#subscription_execution_strategy ⇒ Object

Returns the value of attribute subscription_execution_strategy.



99
100
101
 
# File 'lib/graphql/schema.rb', line 99

def subscription_execution_strategy
  @subscription_execution_strategy
end

#subscriptions ⇒ GraphQL::Subscriptions

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

Returns:



112
113
114
 
# File 'lib/graphql/schema.rb', line 112

def subscriptions
  @subscriptions
end

#tracers ⇒ Array<#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


135
136
137
 
# File 'lib/graphql/schema.rb', line 135

def tracers
  @tracers
end

Class Method Details

.accessible?(member, context) ⇒ Boolean

Returns:

  • (Boolean) 


853
854
855
 
# File 'lib/graphql/schema.rb', line 853

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

.context_class(new_context_class = nil) ⇒ Object 



824
825
826
827
828
829
830
 
# File 'lib/graphql/schema.rb', line 824

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

.cursor_encoder(new_encoder = nil) ⇒ Object 



777
778
779
780
781
782
 
# File 'lib/graphql/schema.rb', line 777

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

.default_max_page_size(new_default_max_page_size = nil) ⇒ Object 



784
785
786
787
788
789
790
 
# File 'lib/graphql/schema.rb', line 784

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
  end
end

.directives(new_directives = nil) ⇒ Object 



905
906
907
908
909
910
911
 
# File 'lib/graphql/schema.rb', line 905

def directives(new_directives = nil)
  if new_directives
    @directives = new_directives.reduce({}) { |m, d| m[d.name] = d; m }
  end

  @directives ||= directives(DIRECTIVES)
end

.from_definition(definition_or_path, default_resolve: BuildFromDefinition::DefaultResolve, parser: BuildFromDefinition::DefaultParser) ⇒ GraphQL::Schema

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: BuildFromDefinition::DefaultResolve) —

    A callable for handling field resolution

  • parser (Object) (defaults to: BuildFromDefinition::DefaultParser) —

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

Returns:



592
593
594
595
596
597
598
599
600
 
# File 'lib/graphql/schema.rb', line 592

def self.from_definition(definition_or_path, default_resolve: BuildFromDefinition::DefaultResolve, parser: BuildFromDefinition::DefaultParser)
  # 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)
end

.from_introspection(introspection_result) ⇒ GraphQL::Schema

Create schema with the result of an introspection query.

Parameters:

Returns:



583
584
585
 
# File 'lib/graphql/schema.rb', line 583

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

.graphql_definition ⇒ Object 



677
678
679
 
# File 'lib/graphql/schema.rb', line 677

def graphql_definition
  @graphql_definition ||= to_graphql
end

.id_from_object(object, type, ctx) ⇒ Object

Raises:

  • (NotImplementedError) 


845
846
847
 
# File 'lib/graphql/schema.rb', line 845

def id_from_object(object, type, ctx)
  raise NotImplementedError, "#{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:



865
866
867
 
# File 'lib/graphql/schema.rb', line 865

def inaccessible_fields(error)
  error
end

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



896
897
898
899
900
901
902
903
 
# File 'lib/graphql/schema.rb', line 896

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

.introspection(new_introspection_namespace = nil) ⇒ Object 



769
770
771
772
773
774
775
 
# File 'lib/graphql/schema.rb', line 769

def introspection(new_introspection_namespace = nil)
  if new_introspection_namespace
    @introspection = new_introspection_namespace
  else
    @introspection
  end
end

.lazy_resolve(lazy_class, value_method) ⇒ Object 



892
893
894
 
# File 'lib/graphql/schema.rb', line 892

def lazy_resolve(lazy_class, value_method)
  lazy_classes[lazy_class] = value_method
end

.max_complexity(max_complexity = nil) ⇒ Object 



792
793
794
795
796
797
798
 
# File 'lib/graphql/schema.rb', line 792

def max_complexity(max_complexity = nil)
  if max_complexity
    @max_complexity = max_complexity
  else
    @max_complexity
  end
end

.max_depth(new_max_depth = nil) ⇒ Object 



800
801
802
803
804
805
806
 
# File 'lib/graphql/schema.rb', line 800

def max_depth(new_max_depth = nil)
  if new_max_depth
    @max_depth = new_max_depth
  else
    @max_depth
  end
end

.middleware(new_middleware = nil) ⇒ Object 



921
922
923
924
925
926
927
 
# File 'lib/graphql/schema.rb', line 921

def middleware(new_middleware = nil)
  if new_middleware
    defined_middleware << new_middleware
  else
    graphql_definition.middleware
  end
end

.multiplex_analyzer(new_analyzer) ⇒ Object 



929
930
931
 
# File 'lib/graphql/schema.rb', line 929

def multiplex_analyzer(new_analyzer)
  defined_multiplex_analyzers << new_analyzer
end

.mutation(new_mutation_object = nil) ⇒ Object 



753
754
755
756
757
758
759
 
# File 'lib/graphql/schema.rb', line 753

def mutation(new_mutation_object = nil)
  if new_mutation_object
    @mutation_object = new_mutation_object
  else
    @mutation_object.respond_to?(:graphql_definition) ? @mutation_object.graphql_definition : @mutation_object
  end
end

.object_from_id(node_id, ctx) ⇒ Object

Raises:

  • (NotImplementedError) 


841
842
843
 
# File 'lib/graphql/schema.rb', line 841

def object_from_id(node_id, ctx)
  raise NotImplementedError, "#{self.name}.object_from_id(node_id, ctx) must be implemented to use the `node` field (tried to load from id `#{node_id}`)"
end

.orphan_types(*new_orphan_types) ⇒ Object 



808
809
810
811
812
813
814
 
# File 'lib/graphql/schema.rb', line 808

def orphan_types(*new_orphan_types)
  if new_orphan_types.any?
    @orphan_types = new_orphan_types.flatten
  else
    @orphan_types || []
  end
end

.plugins ⇒ Object 



685
686
687
 
# File 'lib/graphql/schema.rb', line 685

def plugins
  @plugins ||= []
end

.query(new_query_object = nil) ⇒ Object 



745
746
747
748
749
750
751
 
# File 'lib/graphql/schema.rb', line 745

def query(new_query_object = nil)
  if new_query_object
    @query_object = new_query_object
  else
    @query_object.respond_to?(:graphql_definition) ? @query_object.graphql_definition : @query_object
  end
end

.query_analyzer(new_analyzer) ⇒ Object 



917
918
919
 
# File 'lib/graphql/schema.rb', line 917

def query_analyzer(new_analyzer)
  defined_query_analyzers << new_analyzer
end

.rescue_from(err_class, &handler_block) ⇒ Object 



832
833
834
835
 
# File 'lib/graphql/schema.rb', line 832

def rescue_from(err_class, &handler_block)
  @rescues ||= {}
  @rescues[err_class] = handler_block
end

.resolve_type(type, obj, ctx) ⇒ Object

Raises:

  • (NotImplementedError) 


837
838
839
 
# File 'lib/graphql/schema.rb', line 837

def resolve_type(type, obj, ctx)
  raise NotImplementedError, "#{self.name}.resolve_type(type, obj, ctx) must be implemented to use Union types or Interface types (tried to resolve: #{type.name})"
end

.subscription(new_subscription_object = nil) ⇒ Object 



761
762
763
764
765
766
767
 
# File 'lib/graphql/schema.rb', line 761

def subscription(new_subscription_object = nil)
  if new_subscription_object
    @subscription_object = new_subscription_object
  else
    @subscription_object.respond_to?(:graphql_definition) ? @subscription_object.graphql_definition : @subscription_object
  end
end

.sync_lazy(value) {|value| ... } ⇒ Object

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

Parameters:

Yields:

  • (value)

Returns:

  • (Object) —

    A GraphQL-ready (non-lazy) object



1021
1022
1023
 
# File 'lib/graphql/schema.rb', line 1021

def self.sync_lazy(value)
  yield(value)
end

.to_graphql ⇒ Object 



689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
 
# File 'lib/graphql/schema.rb', line 689

def to_graphql
  schema_defn = self.new
  schema_defn.raise_definition_error = true
  schema_defn.query = query
  schema_defn.mutation = mutation
  schema_defn.subscription = subscription
  schema_defn.max_complexity = max_complexity
  schema_defn.max_depth = max_depth
  schema_defn.default_max_page_size = default_max_page_size
  schema_defn.orphan_types = orphan_types
  schema_defn.directives = directives
  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(defined_tracers)
  schema_defn.query_analyzers.concat(defined_query_analyzers)
  schema_defn.query_analyzers << GraphQL::Authorization::Analyzer
  schema_defn.middleware.concat(defined_middleware)
  schema_defn.multiplex_analyzers.concat(defined_multiplex_analyzers)
  defined_instrumenters.each do |step, insts|
    insts.each do |inst|
      schema_defn.instrumenters[step] << inst
    end
  end
  schema_defn.instrumenters[:query] << GraphQL::Schema::Member::Instrumentation
  lazy_classes.each do |lazy_class, value_method|
    schema_defn.lazy_methods.set(lazy_class, value_method)
  end
  if @rescues
    @rescues.each do |err_class, handler|
      schema_defn.rescue_from(err_class, &handler)
    end
  end

  if plugins.any?
    schema_plugins = plugins
    # TODO don't depend on .define
    schema_defn = schema_defn.redefine do
      schema_plugins.each do |plugin, options|
        if options.any?
          use(plugin, **options)
        else
          use(plugin)
        end
      end
    end
  end
  schema_defn.send(:rebuild_artifacts)

  schema_defn
end

.tracer(new_tracer) ⇒ Object 



913
914
915
 
# File 'lib/graphql/schema.rb', line 913

def tracer(new_tracer)
  defined_tracers << new_tracer
end

.type_error(type_err, ctx) ⇒ Object 



888
889
890
 
# File 'lib/graphql/schema.rb', line 888

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



884
885
886
 
# File 'lib/graphql/schema.rb', line 884

def unauthorized_object(unauthorized_error)
  nil
end

.use(plugin, options = {}) ⇒ Object 



681
682
683
 
# File 'lib/graphql/schema.rb', line 681

def use(plugin, options = {})
  plugins << [plugin, options]
end

.visible?(member, context) ⇒ Boolean

Returns:

  • (Boolean) 


849
850
851
 
# File 'lib/graphql/schema.rb', line 849

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

Instance Method Details

#after_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.

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)


1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
 
# File 'lib/graphql/schema.rb', line 1003

def after_lazy(value)
  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) do |final_result|
        yield(final_result) if block_given?
      end
    end
  else
    yield(value) if block_given?
  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



635
636
637
 
# File 'lib/graphql/schema.rb', line 635

def as_json(only: nil, except: nil, context: {})
  execute(Introspection::INTROSPECTION_QUERY, only: only, except: except, context: context).to_h
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



454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
 
# File 'lib/graphql/schema.rb', line 454

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.respond_to?(:graphql_definition)
    type_result = type_result.graphql_definition
  end

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

#default_filter ⇒ Object 



129
130
131
 
# File 'lib/graphql/schema.rb', line 129

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

#define(**kwargs, &block) ⇒ Object 



229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
 
# File 'lib/graphql/schema.rb', line 229

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

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


304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
 
# File 'lib/graphql/schema.rb', line 304

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 



422
423
424
425
426
427
428
429
430
431
432
433
 
# File 'lib/graphql/schema.rb', line 422

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


354
355
356
357
 
# File 'lib/graphql/schema.rb', line 354

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


365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
 
# File 'lib/graphql/schema.rb', line 365

def get_field(parent_type, field_name)
  with_definition_error_check do
    parent_type_name = case parent_type
    when GraphQL::BaseType
      parent_type.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:



391
392
393
 
# File 'lib/graphql/schema.rb', line 391

def get_fields(type)
  @instrumented_field_map[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



567
568
569
570
571
572
573
 
# File 'lib/graphql/schema.rb', line 567

def id_from_object(object, type, ctx)
  if @id_from_object_proc.nil?
    raise(NotImplementedError, "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



576
577
578
 
# File 'lib/graphql/schema.rb', line 576

def id_from_object=(new_proc)
  @id_from_object_proc = new_proc
end

#initialize_copy(other) ⇒ Object 



173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
 
# File 'lib/graphql/schema.rb', line 173

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

#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 


253
254
255
256
257
258
 
# File 'lib/graphql/schema.rb', line 253

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

#introspection_system ⇒ 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. 



278
279
280
281
282
283
 
# File 'lib/graphql/schema.rb', line 278

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

#lazy?(obj) ⇒ Boolean

Returns True if this object should be lazily resolved.

Returns:

  • (Boolean) —

    True if this object should be lazily resolved



611
612
613
 
# File 'lib/graphql/schema.rb', line 611

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 wtih #lazy_resolve.

Returns:

  • (Symbol, nil) —

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



606
607
608
 
# File 'lib/graphql/schema.rb', line 606

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


340
341
342
343
344
 
# File 'lib/graphql/schema.rb', line 340

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



501
502
503
504
505
506
507
 
# File 'lib/graphql/schema.rb', line 501

def object_from_id(id, ctx)
  if @object_from_id_proc.nil?
    raise(NotImplementedError, "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



510
511
512
 
# File 'lib/graphql/schema.rb', line 510

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.


553
554
555
 
# File 'lib/graphql/schema.rb', line 553

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



558
559
560
 
# File 'lib/graphql/schema.rb', line 558

def parse_error=(new_proc)
  @parse_error_proc = new_proc
end

#possible_types(type_defn) ⇒ Array<GraphQL::ObjectType>

Returns types which belong to type_defn in this schema.

Parameters:

Returns:

See Also:

  • Restricted access to members of a schema


402
403
404
405
 
# File 'lib/graphql/schema.rb', line 402

def possible_types(type_defn)
  @possible_types ||= GraphQL::Schema::PossibleTypes.new(self)
  @possible_types.possible_types(type_defn)
end

#references_to(type_name) ⇒ Hash

Returns a list of Arguments and Fields referencing a certain type

Parameters:

  • type_name (String)

Returns:

  • (Hash) 


288
289
290
291
 
# File 'lib/graphql/schema.rb', line 288

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

#remove_handler(*args, &block) ⇒ Object 



205
206
207
 
# File 'lib/graphql/schema.rb', line 205

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

#rescue_from(*args, &block) ⇒ Object 



201
202
203
 
# File 'lib/graphql/schema.rb', line 201

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


442
443
444
445
446
447
448
449
 
# File 'lib/graphql/schema.rb', line 442

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(NotImplementedError, "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 



492
493
494
495
 
# File 'lib/graphql/schema.rb', line 492

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


409
410
411
412
413
414
415
416
417
418
419
420
 
# File 'lib/graphql/schema.rb', line 409

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<GraphQL::BaseType>

Returns The root types of this schema.

Returns:



261
262
263
264
265
266
 
# File 'lib/graphql/schema.rb', line 261

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

See Also:



1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
 
# File 'lib/graphql/schema.rb', line 1027

def sync_lazy(value)
  self.class.sync_lazy(value) { |v|
    lazy_method = lazy_method_name(v)
    if lazy_method
      synced_value = value.public_send(lazy_method)
      sync_lazy(synced_value)
    else
      v
    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) 


620
621
622
 
# File 'lib/graphql/schema.rb', line 620

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

#to_document ⇒ GraphQL::Language::Document

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

Returns:

  • (GraphQL::Language::Document) 


626
627
628
 
# File 'lib/graphql/schema.rb', line 626

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:

  • GraphQL::Schema.{{#as_json}


642
643
644
 
# File 'lib/graphql/schema.rb', line 642

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.


534
535
536
 
# File 'lib/graphql/schema.rb', line 534

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



539
540
541
 
# File 'lib/graphql/schema.rb', line 539

def type_error=(new_proc)
  @type_error_proc = new_proc
end

#type_from_ast(ast_node) ⇒ Object 



395
396
397
 
# File 'lib/graphql/schema.rb', line 395

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

#types ⇒ GraphQL::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


270
271
272
273
274
275
 
# File 'lib/graphql/schema.rb', line 270

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:



296
297
298
299
 
# File 'lib/graphql/schema.rb', line 296

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

#validate(string_or_document, rules: nil) ⇒ Array<GraphQL::StaticValidation::Message>

Validate a query string according to this schema.

Parameters:

Returns:



215
216
217
218
219
220
221
222
223
224
225
226
227
 
# File 'lib/graphql/schema.rb', line 215

def validate(string_or_document, rules: 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)
  validator_opts = { schema: self }
  rules && (validator_opts[:rules] = rules)
  validator = GraphQL::StaticValidation::Validator.new(validator_opts)
  res = validator.validate(query)
  res[:errors]
end