Class: GraphQL::Schema

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

Overview

A GraphQL schema which may be queried with Query.

The Schema contains:

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

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

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

Schemas can specify how queries should be executed against them. query_execution_strategy, mutation_execution_strategy and subscription_execution_strategy each apply to corresponding root types.

Examples:

defining a schema

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

Direct Known Subclasses

Query::NullContext::NullSchema

Defined Under Namespace

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

Constant Summary collapse

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

Class Attribute Summary collapse

Attributes included from Member::HasAstNode

#ast_node

Class Method Summary collapse

Methods included from Member::HasAstNode

inherited

Class Attribute Details

.analysis_engine ⇒ Object 



717
718
719
 
# File 'lib/graphql/schema.rb', line 717

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

.connections ⇒ GraphQL::Pagination::Connections

Returns if installed.

Returns:



391
392
393
394
395
396
397
398
399
400
401
402
403
404
 
# File 'lib/graphql/schema.rb', line 391

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

.dataloader_class ⇒ Object

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

See Also:



533
534
535
 
# File 'lib/graphql/schema.rb', line 533

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

.error_bubbling(new_error_bubbling = nil) ⇒ Object 



731
732
733
734
735
736
737
 
# File 'lib/graphql/schema.rb', line 731

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

.interpreter=(value) ⇒ Object (writeonly)

Sets the attribute interpreter

Parameters:

  • value —

    the value to set the attribute interpreter to.



729
730
731
 
# File 'lib/graphql/schema.rb', line 729

def interpreter=(value)
  @interpreter = value
end

.max_complexity(max_complexity = nil) ⇒ Object 



705
706
707
708
709
710
711
712
713
 
# File 'lib/graphql/schema.rb', line 705

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, count_introspection_fields: true) ⇒ Object 



743
744
745
746
747
748
749
750
751
752
 
# File 'lib/graphql/schema.rb', line 743

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

.validate_max_errors(new_validate_max_errors = nil) ⇒ Object 



693
694
695
696
697
698
699
700
701
 
# File 'lib/graphql/schema.rb', line 693

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

.validate_timeout(new_validate_timeout = nil) ⇒ Object 



664
665
666
667
668
669
670
671
672
 
# File 'lib/graphql/schema.rb', line 664

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

.warden_class ⇒ Object 



472
473
474
475
476
477
478
479
480
 
# File 'lib/graphql/schema.rb', line 472

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

Class Method Details

.add_subscription_extension_if_necessary ⇒ Object

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



1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
 
# File 'lib/graphql/schema.rb', line 1240

def add_subscription_extension_if_necessary
  if !defined?(@subscription_extension_added) && subscription && self.subscriptions
    @subscription_extension_added = true
    subscription.all_field_definitions.each do |field|
      if !field.extensions.any? { |ext| ext.is_a?(Subscriptions::DefaultSubscriptionResolveExtension) }
        field.extension(Subscriptions::DefaultSubscriptionResolveExtension)
      end
    end
  end
end

.after_any_lazies(maybe_lazies) ⇒ Object

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

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

Parameters:

  • maybe_lazies (Array) 


1299
1300
1301
1302
1303
1304
1305
1306
1307
 
# File 'lib/graphql/schema.rb', line 1299

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

.after_lazy(value, &block) ⇒ Object

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

Call the given block at the right time, either: - Right away, if value is not registered with lazy_resolve - After resolving value, if it’s registered with lazy_resolve (eg, Promise)



1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
 
# File 'lib/graphql/schema.rb', line 1259

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

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

Return the Hash response of Introspection::INTROSPECTION_QUERY.

Parameters:

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

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

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

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

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

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

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

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

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

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

Returns:

  • (Hash) —

    GraphQL result



265
266
267
268
269
270
271
272
273
274
275
 
# File 'lib/graphql/schema.rb', line 265

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

  execute(introspection_query, context: context).to_h
end

.build_trace_mode(mode) ⇒ Object 



205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
 
# File 'lib/graphql/schema.rb', line 205

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

.context_class(new_context_class = nil) ⇒ Object 



859
860
861
862
863
864
865
 
# File 'lib/graphql/schema.rb', line 859

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

.count_introspection_fields ⇒ Object 



754
755
756
757
758
759
760
 
# File 'lib/graphql/schema.rb', line 754

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

.cursor_encoder(new_encoder = nil) ⇒ Object 



615
616
617
618
619
620
 
# File 'lib/graphql/schema.rb', line 615

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

.default_analysis_engine ⇒ Object 



831
832
833
834
835
836
837
 
# File 'lib/graphql/schema.rb', line 831

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

.default_directives ⇒ Object 



1063
1064
1065
1066
1067
1068
1069
1070
1071
 
# File 'lib/graphql/schema.rb', line 1063

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

.default_execution_strategy ⇒ Object 



823
824
825
826
827
828
829
 
# File 'lib/graphql/schema.rb', line 823

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

.default_logger(new_default_logger = NOT_CONFIGURED) ⇒ Object 



839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
 
# File 'lib/graphql/schema.rb', line 839

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

.default_max_page_size(new_default_max_page_size = nil) ⇒ Object 



622
623
624
625
626
627
628
 
# File 'lib/graphql/schema.rb', line 622

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

.default_page_size(new_default_page_size = nil) ⇒ Object 



630
631
632
633
634
635
636
 
# File 'lib/graphql/schema.rb', line 630

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

.default_trace_mode(new_mode = nil) ⇒ Object

Parameters:

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

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



151
152
153
154
155
156
157
158
159
160
161
 
# File 'lib/graphql/schema.rb', line 151

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

.deprecated_graphql_definition ⇒ Object 



137
138
139
 
# File 'lib/graphql/schema.rb', line 137

def deprecated_graphql_definition
  graphql_definition(silence_deprecation_warning: true)
end

.description(new_description = nil) ⇒ String?

Returns:

  • (String, nil) 


291
292
293
294
295
296
297
298
299
 
# File 'lib/graphql/schema.rb', line 291

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

.directive(new_directive) ⇒ Object

Attach a single directive to this schema

Parameters:

  • new_directive (Class)

Returns:

  • void



1059
1060
1061
 
# File 'lib/graphql/schema.rb', line 1059

def directive(new_directive)
  add_type_and_traverse(new_directive, root: false)
end

.directives(*new_directives) ⇒ Object

Add several directives at once

Parameters:

  • new_directives (Class) 


1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
 
# File 'lib/graphql/schema.rb', line 1043

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

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

.disable_introspection_entry_points ⇒ Object 



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

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) 


780
781
782
783
784
785
786
 
# File 'lib/graphql/schema.rb', line 780

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

.disable_schema_introspection_entry_point ⇒ Object 



768
769
770
771
772
 
# File 'lib/graphql/schema.rb', line 768

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) 


788
789
790
791
792
793
794
 
# File 'lib/graphql/schema.rb', line 788

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

.disable_type_introspection_entry_point ⇒ Object 



774
775
776
777
778
 
# File 'lib/graphql/schema.rb', line 774

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) 


796
797
798
799
800
801
802
 
# File 'lib/graphql/schema.rb', line 796

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

.error_handlers ⇒ Object 



881
882
883
884
885
886
887
 
# File 'lib/graphql/schema.rb', line 881

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


1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
 
# File 'lib/graphql/schema.rb', line 1188

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

.find(path) ⇒ Object 



301
302
303
304
305
306
307
 
# File 'lib/graphql/schema.rb', line 301

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

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

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

Parameters:

  • definition_or_path (String) —

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

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

    A callable for handling field resolution

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

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

  • using (Hash) (defaults to: {}) —

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

Returns:

  • (Class) —

    the schema described by document



116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
 
# File 'lib/graphql/schema.rb', line 116

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

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

Create schema with the result of an introspection query.

Parameters:

Returns:



106
107
108
 
# File 'lib/graphql/schema.rb', line 106

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

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



570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
 
# File 'lib/graphql/schema.rb', line 570

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

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

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



593
594
595
 
# File 'lib/graphql/schema.rb', line 593

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

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



356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
 
# File 'lib/graphql/schema.rb', line 356

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

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

.handle_or_reraise(context, err) ⇒ Object

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



890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
 
# File 'lib/graphql/schema.rb', line 890

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

.id_from_object(object, type, ctx) ⇒ Object

Raises:



960
961
962
 
# File 'lib/graphql/schema.rb', line 960

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

.inherited(child_class) ⇒ Object

rubocop:enable Lint/DuplicateMethods



942
943
944
945
946
947
948
949
950
951
952
953
954
 
# File 'lib/graphql/schema.rb', line 942

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

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



1037
1038
1039
 
# File 'lib/graphql/schema.rb', line 1037

def instrument(instrument_step, instrumenter, options = {})
  own_instrumenters[instrument_step] << instrumenter
end

.instrumenters ⇒ Object 



1232
1233
1234
1235
1236
1237
 
# File 'lib/graphql/schema.rb', line 1232

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) 


725
726
727
 
# File 'lib/graphql/schema.rb', line 725

def interpreter?
  true
end

.introspection(new_introspection_namespace = nil) ⇒ Object 



597
598
599
600
601
602
603
604
605
 
# File 'lib/graphql/schema.rb', line 597

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_system ⇒ Object 



607
608
609
610
611
612
613
 
# File 'lib/graphql/schema.rb', line 607

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

.lazy?(obj) ⇒ Boolean

Returns True if this object should be lazily resolved.

Returns:

  • (Boolean) —

    True if this object should be lazily resolved



1291
1292
1293
 
# File 'lib/graphql/schema.rb', line 1291

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

.lazy_method_name(obj) ⇒ Symbol?

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

Returns:

  • (Symbol, nil) —

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



1286
1287
1288
 
# File 'lib/graphql/schema.rb', line 1286

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

.lazy_resolve(lazy_class, value_method) ⇒ Object 



1033
1034
1035
 
# File 'lib/graphql/schema.rb', line 1033

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


1228
1229
1230
 
# File 'lib/graphql/schema.rb', line 1228

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

.multiplex_analyzer(new_analyzer) ⇒ Object 



1169
1170
1171
 
# File 'lib/graphql/schema.rb', line 1169

def multiplex_analyzer(new_analyzer)
  own_multiplex_analyzers << new_analyzer
end

.multiplex_analyzers ⇒ Object 



1173
1174
1175
 
# File 'lib/graphql/schema.rb', line 1173

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

.mutation(new_mutation_object = nil) ⇒ Object 



424
425
426
427
428
429
430
431
432
433
434
435
436
 
# File 'lib/graphql/schema.rb', line 424

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 



646
647
648
649
650
651
652
 
# File 'lib/graphql/schema.rb', line 646

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) 


406
407
408
 
# File 'lib/graphql/schema.rb', line 406

def new_connections?
  !!connections
end

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

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

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

Parameters:

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

    Trace modules for this trade mode will be included

  • options (Hash) —

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

Returns:



1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
 
# File 'lib/graphql/schema.rb', line 1138

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

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

  base_trace_options = trace_options_for(trace_mode)
  trace_options = base_trace_options.merge(options)
  trace_class_for_mode = trace_class_for(trace_mode) || raise(ArgumentError, "#{self} has no trace class for mode: #{trace_mode.inspect}")
  trace_class_for_mode.new(**trace_options)
end

.object_from_id(node_id, ctx) ⇒ Object

Raises:



956
957
958
 
# File 'lib/graphql/schema.rb', line 956

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 



804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
 
# File 'lib/graphql/schema.rb', line 804

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)
    own_orphan_types.concat(new_orphan_types.flatten)
  end

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

.own_trace_modes ⇒ Object 



196
197
198
 
# File 'lib/graphql/schema.rb', line 196

def own_trace_modes
  @own_trace_modes ||= {}
end

.own_trace_modules ⇒ Object 



234
235
236
 
# File 'lib/graphql/schema.rb', line 234

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

.parse_error(parse_err, ctx) ⇒ Object

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

The default is to add the error to context.errors

Parameters:

Returns:

  • void



1029
1030
1031
 
# File 'lib/graphql/schema.rb', line 1029

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

.plugins ⇒ Object 



322
323
324
 
# File 'lib/graphql/schema.rb', line 322

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

.possible_types(type = nil, context = GraphQL::Query::NullContext.instance) ⇒ 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.



487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
 
# File 'lib/graphql/schema.rb', line 487

def possible_types(type = nil, context = GraphQL::Query::NullContext.instance)
  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 = if stored_possible_types && type.kind.interface?
        stored_possible_types.select do |possible_type|
          possible_type.interfaces(context).include?(type)
        end
      else
        stored_possible_types
      end
      visible_possible_types ||
        introspection_system.possible_types[type.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 



410
411
412
413
414
415
416
417
418
419
420
421
422
 
# File 'lib/graphql/schema.rb', line 410

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 



1161
1162
1163
 
# File 'lib/graphql/schema.rb', line 1161

def query_analyzer(new_analyzer)
  own_query_analyzers << new_analyzer
end

.query_analyzers ⇒ Object 



1165
1166
1167
 
# File 'lib/graphql/schema.rb', line 1165

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

.query_execution_strategy(new_query_execution_strategy = nil) ⇒ Object 



638
639
640
641
642
643
644
 
# File 'lib/graphql/schema.rb', line 638

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 



1251
1252
1253
 
# File 'lib/graphql/schema.rb', line 1251

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 



539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
 
# File 'lib/graphql/schema.rb', line 539

def references_to(to_type = nil, from: nil)
  @own_references_to ||= {}
  if to_type
    if !to_type.is_a?(String)
      to_type = to_type.graphql_name
    end

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

.rescue_from(*err_classes, &handler_block) ⇒ Object 



867
868
869
870
871
 
# File 'lib/graphql/schema.rb', line 867

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

.resolve_type(type, obj, ctx) ⇒ Object 



933
934
935
936
937
938
939
 
# File 'lib/graphql/schema.rb', line 933

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:

  • (GraphQL::ObjectType, nil)

See Also:

  • Restricted access to root types


455
456
457
458
459
460
461
462
463
464
465
466
 
# File 'lib/graphql/schema.rb', line 455

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 ⇒ Object 



468
469
470
 
# File 'lib/graphql/schema.rb', line 468

def root_types
  @root_types
end

.sanitized_printer(new_sanitized_printer = nil) ⇒ Object 



1177
1178
1179
1180
1181
1182
1183
 
# File 'lib/graphql/schema.rb', line 1177

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

.schema_directive(dir_class, **options) ⇒ Object 



968
969
970
971
 
# File 'lib/graphql/schema.rb', line 968

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

.schema_directives ⇒ Object 



973
974
975
 
# File 'lib/graphql/schema.rb', line 973

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

.static_validator ⇒ Object 



309
310
311
 
# File 'lib/graphql/schema.rb', line 309

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

.subscription(new_subscription_object = nil) ⇒ Object 



438
439
440
441
442
443
444
445
446
447
448
449
450
451
 
# File 'lib/graphql/schema.rb', line 438

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 



654
655
656
657
658
659
660
 
# File 'lib/graphql/schema.rb', line 654

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

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

Returns:



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

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

.subscriptions=(new_implementation) ⇒ Object 



146
147
148
 
# File 'lib/graphql/schema.rb', line 146

def subscriptions=(new_implementation)
  @subscriptions = new_implementation
end

.sync_lazy(value) ⇒ Object

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

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

Parameters:

Returns:

  • (Object) —

    A GraphQL-ready (non-lazy) object



1275
1276
1277
1278
1279
1280
1281
1282
1283
 
# File 'lib/graphql/schema.rb', line 1275

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

.to_definition(context: {}) ⇒ String

Return the GraphQL IDL for the schema

Parameters:

  • context (Hash) (defaults to: {})

Returns:

  • (String) 


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

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

.to_document ⇒ GraphQL::Language::Document

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

Returns:

  • (GraphQL::Language::Document) 


286
287
288
 
# File 'lib/graphql/schema.rb', line 286

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

.to_json(**args) ⇒ String

Returns the JSON response of Introspection::INTROSPECTION_QUERY.

Returns:

  • (String)

See Also:

  • {{#as_json}


251
252
253
 
# File 'lib/graphql/schema.rb', line 251

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

.trace_class(new_class = nil) ⇒ Object 



163
164
165
166
167
168
169
170
171
 
# File 'lib/graphql/schema.rb', line 163

def trace_class(new_class = nil)
  if new_class
    trace_mode(:default, new_class)
    backtrace_class = Class.new(new_class)
    backtrace_class.include(GraphQL::Backtrace::Trace)
    trace_mode(:default_backtrace, backtrace_class)
  end
  trace_class_for(:default)
end

.trace_class_for(mode, build: true) ⇒ Class

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

Returns:

  • (Class) —

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



174
175
176
177
 
# File 'lib/graphql/schema.rb', line 174

def trace_class_for(mode, build: true)
  own_trace_modes[mode] ||
    (superclass.respond_to?(:trace_class_for) ? superclass.trace_class_for(mode, build: build) : (build ? (own_trace_modes[mode] = build_trace_mode(mode)) : nil))
end

.trace_mode(mode_name, trace_class) ⇒ Object

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

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

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

Parameters:

  • mode_name (Symbol)
  • trace_class (Class) —

    subclass of GraphQL::Tracing::Trace

Returns:

  • void



191
192
193
194
 
# File 'lib/graphql/schema.rb', line 191

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

.trace_modules_for(trace_mode) ⇒ Array<Module>

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

Returns:

  • (Array<Module>) —

    Modules added for tracing in trace_mode, including inherited ones



239
240
241
242
243
244
245
 
# File 'lib/graphql/schema.rb', line 239

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

.trace_options_for(mode) ⇒ Hash

The options hash for this trace mode

Returns:

  • (Hash) 


1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
 
# File 'lib/graphql/schema.rb', line 1120

def trace_options_for(mode)
  @trace_options_for_mode ||= {}
  @trace_options_for_mode[mode] ||= begin
    if superclass.respond_to?(:trace_options_for)
      superclass.trace_options_for(mode).dup
    else
      {}
    end
  end
end

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

This method returns an undefined value.

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

Parameters:

  • trace_mod (Module) —

    A module that implements tracing methods

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

    Trace module will only be used for this trade mode

  • options (Hash) —

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



1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
 
# File 'lib/graphql/schema.rb', line 1093

def trace_with(trace_mod, mode: :default, **options)
  if mode.is_a?(Array)
    mode.each { |m| trace_with(trace_mod, mode: m, **options) }
  else
    tc = own_trace_modes[mode] ||= build_trace_mode(mode)
    tc.include(trace_mod)
    own_trace_modules[mode] << trace_mod

    if mode == :default
      # This module is being added as a default tracer. If any other mode classes
      # have already been created, but get their default behavior from a superclass,
      # Then mix this into this schema's subclass.
      # (But don't mix it into mode classes that aren't default-based.)
      own_trace_modes.each do |other_mode_name, other_mode_class|
        if other_mode_class < DefaultTraceClass && !(other_mode_class < trace_mod)
          other_mode_class.include(trace_mod)
        end
      end
    end
    t_opts = trace_options_for(mode)
    t_opts.merge!(options)
  end
  nil
end

.tracer(new_tracer) ⇒ Object 



1073
1074
1075
1076
1077
1078
1079
1080
 
# File 'lib/graphql/schema.rb', line 1073

def tracer(new_tracer)
  default_trace = trace_class_for(:default)
  if default_trace.nil? || !(default_trace < GraphQL::Tracing::CallLegacyTracers)
    trace_with(GraphQL::Tracing::CallLegacyTracers)
  end

  own_tracers << new_tracer
end

.tracers ⇒ Object 



1082
1083
1084
 
# File 'lib/graphql/schema.rb', line 1082

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

.type_error(type_error, ctx) ⇒ Object 



1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
 
# File 'lib/graphql/schema.rb', line 1012

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

.type_from_ast(ast_node, context: nil) ⇒ Object 



565
566
567
568
 
# File 'lib/graphql/schema.rb', line 565

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

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

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

Returns:

  • (Hash<String => Class>) —

    A dictionary of type classes by their GraphQL name

See Also:



329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
 
# File 'lib/graphql/schema.rb', line 329

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

.unauthorized_field(unauthorized_error) ⇒ Field

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

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

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

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

Parameters:

Returns:

  • (Field) —

    The returned field will be put in the GraphQL response



1008
1009
1010
 
# File 'lib/graphql/schema.rb', line 1008

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



992
993
994
 
# File 'lib/graphql/schema.rb', line 992

def unauthorized_object(unauthorized_error)
  nil
end

.union_memberships(type = nil) ⇒ Object 



516
517
518
519
520
521
522
523
524
525
526
527
528
529
 
# File 'lib/graphql/schema.rb', line 516

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 



313
314
315
316
317
318
319
320
 
# File 'lib/graphql/schema.rb', line 313

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) 


721
722
723
 
# File 'lib/graphql/schema.rb', line 721

def using_ast_analysis?
  true
end

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

Validate a query string according to this schema.

Parameters:

Returns:



677
678
679
680
681
682
683
684
685
686
687
688
689
 
# File 'lib/graphql/schema.rb', line 677

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, timeout: validate_timeout, max_errors: validate_max_errors)
  res[:errors]
end

.visible?(member, ctx) ⇒ Boolean

Returns:

  • (Boolean) 


964
965
966
 
# File 'lib/graphql/schema.rb', line 964

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