Validation

GraphQL Validation

The graphql.validation package fulfills the Validation phase of fulfilling a GraphQL result.

graphql.validation.validate(schema: GraphQLSchema, document_ast: DocumentNode, rules: Collection[type[ASTValidationRule]] | None = None, max_errors: int | None = None, type_info: TypeInfo | None = None) → list[GraphQLError]

Implements the “Validation” section of the spec.

Validation runs synchronously, returning a list of encountered errors, or an empty list if no errors were encountered and the document is valid.

A list of specific validation rules may be provided. If not provided, the default list of rules defined by the GraphQL specification will be used.

Each validation rule is a ValidationRule object which is a visitor object that holds a ValidationContext (see the language/visitor API). Visitor methods are expected to return GraphQLErrors, or lists of GraphQLErrors when invalid.

Validate will stop validation after a max_errors limit has been reached. Attackers can send pathologically invalid queries to induce a DoS attack, so by default max_errors set to 100 errors.

Providing a custom TypeInfo instance is deprecated and will be removed in v3.3.

class graphql.validation.ASTValidationContext(ast: DocumentNode, on_error: Callable[[GraphQLError], None])

Bases: object

Utility class providing a context for validation of an AST.

An instance of this class is passed as the context attribute to all Validators, allowing access to commonly useful contextual information from within a validation rule.

__init__(ast: DocumentNode, on_error: Callable[[GraphQLError], None]) → None

document: DocumentNode

get_fragment(name: str) → graphql.language.ast.FragmentDefinitionNode | None

get_fragment_spreads(node: SelectionSetNode) → list[graphql.language.ast.FragmentSpreadNode]

get_recursively_referenced_fragments(operation: OperationDefinitionNode) → list[graphql.language.ast.FragmentDefinitionNode]

on_error(error: GraphQLError) → None

report_error(error: GraphQLError) → None

class graphql.validation.ASTValidationRule(context: ASTValidationContext)

Bases: Visitor

Visitor for validation of an AST.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ASTValidationContext) → None

context: ASTValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

class graphql.validation.SDLValidationContext(ast: DocumentNode, schema: GraphQLSchema | None, on_error: Callable[[GraphQLError], None])

Bases: ASTValidationContext

Utility class providing a context for validation of an SDL AST.

An instance of this class is passed as the context attribute to all Validators, allowing access to commonly useful contextual information from within a validation rule.

__init__(ast: DocumentNode, schema: GraphQLSchema | None, on_error: Callable[[GraphQLError], None]) → None

document: DocumentNode

get_fragment(name: str) → graphql.language.ast.FragmentDefinitionNode | None

get_fragment_spreads(node: SelectionSetNode) → list[graphql.language.ast.FragmentSpreadNode]

get_recursively_referenced_fragments(operation: OperationDefinitionNode) → list[graphql.language.ast.FragmentDefinitionNode]

on_error(error: GraphQLError) → None

report_error(error: GraphQLError) → None

schema: GraphQLSchema | None

class graphql.validation.SDLValidationRule(context: SDLValidationContext)

Bases: ASTValidationRule

Visitor for validation of an SDL AST.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: SDLValidationContext) → None

context: SDLValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

class graphql.validation.ValidationContext(schema: GraphQLSchema, ast: DocumentNode, type_info: TypeInfo, on_error: Callable[[GraphQLError], None])

Bases: ASTValidationContext

Utility class providing a context for validation using a GraphQL schema.

An instance of this class is passed as the context attribute to all Validators, allowing access to commonly useful contextual information from within a validation rule.

__init__(schema: GraphQLSchema, ast: DocumentNode, type_info: TypeInfo, on_error: Callable[[GraphQLError], None]) → None

document: DocumentNode

get_argument() → GraphQLArgument | None

get_directive() → GraphQLDirective | None

get_enum_value() → GraphQLEnumValue | None

get_field_def() → GraphQLField | None

get_fragment(name: str) → graphql.language.ast.FragmentDefinitionNode | None

get_fragment_spreads(node: SelectionSetNode) → list[graphql.language.ast.FragmentSpreadNode]

get_input_type() → GraphQLInputType | None

get_parent_input_type() → GraphQLInputType | None

get_parent_type() → GraphQLCompositeType | None

get_recursive_variable_usages(operation: OperationDefinitionNode) → list[graphql.validation.validation_context.VariableUsage]

get_recursively_referenced_fragments(operation: OperationDefinitionNode) → list[graphql.language.ast.FragmentDefinitionNode]

get_type() → GraphQLOutputType | None

get_variable_usages(node: Union[OperationDefinitionNode, FragmentDefinitionNode]) → list[graphql.validation.validation_context.VariableUsage]

on_error(error: GraphQLError) → None

report_error(error: GraphQLError) → None

schema: GraphQLSchema

class graphql.validation.ValidationRule(context: ValidationContext)

Bases: ASTValidationRule

Visitor for validation using a GraphQL schema.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Rules

graphql.validation.specified_rules: A tuple with all validation rules defined by the GraphQL specification

Spec Section: “Executable Definitions”

class graphql.validation.ExecutableDefinitionsRule(context: ASTValidationContext)

Bases: ASTValidationRule

Executable definitions

A GraphQL document is only valid for execution if all definitions are either operation or fragment definitions.

See https://spec.graphql.org/draft/#sec-Executable-Definitions

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ASTValidationContext) → None

context: ASTValidationContext

enter_document(node: DocumentNode, *_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Field Selections on Objects, Interfaces, and Unions Types”

class graphql.validation.FieldsOnCorrectTypeRule(context: ValidationContext)

Bases: ValidationRule

Fields on correct type

A GraphQL document is only valid if all fields selected are defined by the parent type, or are an allowed meta field such as __typename.

See https://spec.graphql.org/draft/#sec-Field-Selections

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_field(node: FieldNode, *_args: Any) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Fragments on Composite Types”

class graphql.validation.FragmentsOnCompositeTypesRule(context: ValidationContext)

Bases: ValidationRule

Fragments on composite type

Fragments use a type condition to determine if they apply, since fragments can only be spread into a composite type (object, interface, or union), the type condition must also be a composite type.

See https://spec.graphql.org/draft/#sec-Fragments-On-Composite-Types

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_fragment_definition(node: FragmentDefinitionNode, *_args: Any) → None

enter_inline_fragment(node: InlineFragmentNode, *_args: Any) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Argument Names”

class graphql.validation.KnownArgumentNamesRule(context: ValidationContext)

Bases: KnownArgumentNamesOnDirectivesRule

Known argument names

A GraphQL field is only valid if all supplied arguments are defined by that field.

See https://spec.graphql.org/draft/#sec-Argument-Names See https://spec.graphql.org/draft/#sec-Directives-Are-In-Valid-Locations

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_argument(arg_node: ArgumentNode, *args: Any) → None

enter_directive(directive_node: DirectiveNode, *_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Directives Are Defined”

class graphql.validation.KnownDirectivesRule(context: graphql.validation.validation_context.ValidationContext | graphql.validation.validation_context.SDLValidationContext)

Bases: ASTValidationRule

Known directives

A GraphQL document is only valid if all @directives are known by the schema and legally positioned.

See https://spec.graphql.org/draft/#sec-Directives-Are-Defined

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: graphql.validation.validation_context.ValidationContext | graphql.validation.validation_context.SDLValidationContext) → None

context: ValidationContext | SDLValidationContext

enter_directive(node: DirectiveNode, _key: Any, _parent: Any, _path: Any, ancestors: list[graphql.language.ast.Node]) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Fragment spread target defined”

class graphql.validation.KnownFragmentNamesRule(context: ValidationContext)

Bases: ValidationRule

Known fragment names

A GraphQL document is only valid if all ...Fragment fragment spreads refer to fragments defined in the same document.

See https://spec.graphql.org/draft/#sec-Fragment-spread-target-defined

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_fragment_spread(node: FragmentSpreadNode, *_args: Any) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Fragment Spread Type Existence”

class graphql.validation.KnownTypeNamesRule(context: graphql.validation.validation_context.ValidationContext | graphql.validation.validation_context.SDLValidationContext)

Bases: ASTValidationRule

Known type names

A GraphQL document is only valid if referenced types (specifically variable definitions and fragment conditions) are defined by the type schema.

See https://spec.graphql.org/draft/#sec-Fragment-Spread-Type-Existence

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: graphql.validation.validation_context.ValidationContext | graphql.validation.validation_context.SDLValidationContext) → None

context: ASTValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_named_type(node: NamedTypeNode, _key: Any, parent: Node, _path: Any, ancestors: list[graphql.language.ast.Node]) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Lone Anonymous Operation”

class graphql.validation.LoneAnonymousOperationRule(context: ASTValidationContext)

Bases: ASTValidationRule

Lone anonymous operation

A GraphQL document is only valid if when it contains an anonymous operation (the query short-hand) that it contains only that one operation definition.

See https://spec.graphql.org/draft/#sec-Lone-Anonymous-Operation

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ASTValidationContext) → None

context: ASTValidationContext

enter_document(node: DocumentNode, *_args: Any) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_operation_definition(node: OperationDefinitionNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Fragments must not form cycles”

class graphql.validation.NoFragmentCyclesRule(context: ASTValidationContext)

Bases: ASTValidationRule

No fragment cycles

The graph of fragment spreads must not form any cycles including spreading itself. Otherwise an operation could infinitely spread or infinitely execute on cycles in the underlying data.

See https://spec.graphql.org/draft/#sec-Fragment-spreads-must-not-form-cycles

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ASTValidationContext) → None

context: ASTValidationContext

detect_cycle_recursive(fragment: FragmentDefinitionNode) → None

enter_fragment_definition(node: FragmentDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

static enter_operation_definition(*_args: Any) → Optional[VisitorActionEnum]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “All Variable Used Defined”

class graphql.validation.NoUndefinedVariablesRule(context: ValidationContext)

Bases: ValidationRule

No undefined variables

A GraphQL operation is only valid if all variables encountered, both directly and via fragment spreads, are defined by that operation.

See https://spec.graphql.org/draft/#sec-All-Variable-Uses-Defined

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_operation_definition(*_args: Any) → None

enter_variable_definition(node: VariableDefinitionNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

leave_operation_definition(operation: OperationDefinitionNode, *_args: Any) → None

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Fragments must be used”

class graphql.validation.NoUnusedFragmentsRule(context: ASTValidationContext)

Bases: ASTValidationRule

No unused fragments

A GraphQL document is only valid if all fragment definitions are spread within operations, or spread within other fragments spread within operations.

See https://spec.graphql.org/draft/#sec-Fragments-Must-Be-Used

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ASTValidationContext) → None

context: ASTValidationContext

enter_fragment_definition(node: FragmentDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_operation_definition(node: OperationDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

leave_document(*_args: Any) → None

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “All Variables Used”

class graphql.validation.NoUnusedVariablesRule(context: ValidationContext)

Bases: ValidationRule

No unused variables

A GraphQL operation is only valid if all variables defined by an operation are used, either directly or within a spread fragment.

See https://spec.graphql.org/draft/#sec-All-Variables-Used

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_operation_definition(*_args: Any) → None

enter_variable_definition(definition: VariableDefinitionNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

leave_operation_definition(operation: OperationDefinitionNode, *_args: Any) → None

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Field Selection Merging”

class graphql.validation.OverlappingFieldsCanBeMergedRule(context: ValidationContext)

Bases: ValidationRule

Overlapping fields can be merged

A selection set is only valid if all fields (including spreading any fragments) either correspond to distinct response names or can be merged without ambiguity.

See https://spec.graphql.org/draft/#sec-Field-Selection-Merging

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_selection_set(selection_set: SelectionSetNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Fragment spread is possible”

class graphql.validation.PossibleFragmentSpreadsRule(context: ValidationContext)

Bases: ValidationRule

Possible fragment spread

A fragment spread is only valid if the type condition could ever possibly be true: if there is a non-empty intersection of the possible parent types, and possible types which pass the type condition.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_fragment_spread(node: FragmentSpreadNode, *_args: Any) → None

enter_inline_fragment(node: InlineFragmentNode, *_args: Any) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

get_fragment_type(name: str) → Optional[Union[GraphQLObjectType, GraphQLInterfaceType, GraphQLUnionType]]

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Argument Optionality”

class graphql.validation.ProvidedRequiredArgumentsRule(context: ValidationContext)

Bases: ProvidedRequiredArgumentsOnDirectivesRule

Provided required arguments

A field or directive is only valid if all required (non-null without a default value) field arguments have been provided.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

leave_directive(directive_node: DirectiveNode, *_args: Any) → None

leave_field(field_node: FieldNode, *_args: Any) → Optional[VisitorActionEnum]

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Leaf Field Selections”

class graphql.validation.ScalarLeafsRule(context: ValidationContext)

Bases: ValidationRule

Scalar leafs

A GraphQL document is valid only if all leaf fields (fields without sub selections) are of scalar or enum types.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_field(node: FieldNode, *_args: Any) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Subscriptions with Single Root Field”

class graphql.validation.SingleFieldSubscriptionsRule(context: ValidationContext)

Bases: ValidationRule

Subscriptions must only include a single non-introspection field.

A GraphQL subscription is valid only if it contains a single root field and that root field is not an introspection field.

See https://spec.graphql.org/draft/#sec-Single-root-field

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_operation_definition(node: OperationDefinitionNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Argument Uniqueness”

class graphql.validation.UniqueArgumentNamesRule(context: ASTValidationContext)

Bases: ASTValidationRule

Unique argument names

A GraphQL field or directive is only valid if all supplied arguments are uniquely named.

See https://spec.graphql.org/draft/#sec-Argument-Names

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ASTValidationContext) → None

check_arg_uniqueness(argument_nodes: Collection[ArgumentNode]) → None

context: ASTValidationContext

enter_directive(node: DirectiveNode, *_args: Any) → None

enter_field(node: FieldNode, *_args: Any) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Directives Are Unique Per Location”

class graphql.validation.UniqueDirectivesPerLocationRule(context: graphql.validation.validation_context.ValidationContext | graphql.validation.validation_context.SDLValidationContext)

Bases: ASTValidationRule

Unique directive names per location

A GraphQL document is only valid if all non-repeatable directives at a given location are uniquely named.

See https://spec.graphql.org/draft/#sec-Directives-Are-Unique-Per-Location

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: graphql.validation.validation_context.ValidationContext | graphql.validation.validation_context.SDLValidationContext) → None

context: ValidationContext | SDLValidationContext

enter(node: Node, *_args: Any) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Fragment Name Uniqueness”

class graphql.validation.UniqueFragmentNamesRule(context: ASTValidationContext)

Bases: ASTValidationRule

Unique fragment names

A GraphQL document is only valid if all defined fragments have unique names.

See https://spec.graphql.org/draft/#sec-Fragment-Name-Uniqueness

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ASTValidationContext) → None

context: ASTValidationContext

enter_fragment_definition(node: FragmentDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

static enter_operation_definition(*_args: Any) → Optional[VisitorActionEnum]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Input Object Field Uniqueness”

class graphql.validation.UniqueInputFieldNamesRule(context: ASTValidationContext)

Bases: ASTValidationRule

Unique input field names

A GraphQL input object value is only valid if all supplied fields are uniquely named.

See https://spec.graphql.org/draft/#sec-Input-Object-Field-Uniqueness

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ASTValidationContext) → None

context: ASTValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_object_field(node: ObjectFieldNode, *_args: Any) → None

enter_object_value(*_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

leave_object_value(*_args: Any) → None

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Operation Name Uniqueness”

class graphql.validation.UniqueOperationNamesRule(context: ASTValidationContext)

Bases: ASTValidationRule

Unique operation names

A GraphQL document is only valid if all defined operations have unique names.

See https://spec.graphql.org/draft/#sec-Operation-Name-Uniqueness

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ASTValidationContext) → None

context: ASTValidationContext

static enter_fragment_definition(*_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_operation_definition(node: OperationDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Variable Uniqueness”

class graphql.validation.UniqueVariableNamesRule(context: ASTValidationContext)

Bases: ASTValidationRule

Unique variable names

A GraphQL operation is only valid if all its variables are uniquely named.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ASTValidationContext) → None

context: ASTValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_operation_definition(node: OperationDefinitionNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Value Type Correctness”

class graphql.validation.ValuesOfCorrectTypeRule(context: ValidationContext)

Bases: ValidationRule

Value literals of correct type

A GraphQL document is only valid if all value literals are of the type expected at their position.

See https://spec.graphql.org/draft/#sec-Values-of-Correct-Type

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_boolean_value(node: BooleanValueNode, *_args: Any) → None

enter_enum_value(node: EnumValueNode, *_args: Any) → None

enter_float_value(node: FloatValueNode, *_args: Any) → None

enter_int_value(node: IntValueNode, *_args: Any) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_list_value(node: ListValueNode, *_args: Any) → Optional[VisitorActionEnum]

enter_null_value(node: NullValueNode, *_args: Any) → None

enter_object_field(node: ObjectFieldNode, *_args: Any) → None

enter_object_value(node: ObjectValueNode, *_args: Any) → Optional[VisitorActionEnum]

enter_string_value(node: StringValueNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

is_valid_value_node(node: ValueNode) → None

Check whether this is a valid value node.

Any value literal may be a valid representation of a Scalar, depending on that scalar type.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “Variables are Input Types”

class graphql.validation.VariablesAreInputTypesRule(context: ValidationContext)

Bases: ValidationRule

Variables are input types

A GraphQL operation is only valid if all the variables it defines are of input types (scalar, enum, or input object).

See https://spec.graphql.org/draft/#sec-Variables-Are-Input-Types

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_variable_definition(node: VariableDefinitionNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

Spec Section: “All Variable Usages Are Allowed”

class graphql.validation.VariablesInAllowedPositionRule(context: ValidationContext)

Bases: ValidationRule

Variables in allowed position

Variable usages must be compatible with the arguments they are passed to.

See https://spec.graphql.org/draft/#sec-All-Variable-Usages-are-Allowed

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: ValidationContext) → None

context: ValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_operation_definition(*_args: Any) → None

enter_variable_definition(node: VariableDefinitionNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

leave_operation_definition(operation: OperationDefinitionNode, *_args: Any) → None

report_error(error: GraphQLError) → None: Report a GraphQL error.

SDL-specific validation rules

class graphql.validation.LoneSchemaDefinitionRule(context: SDLValidationContext)

Bases: SDLValidationRule

Lone Schema definition

A GraphQL document is only valid if it contains only one schema definition.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: SDLValidationContext) → None

context: SDLValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_schema_definition(node: SchemaDefinitionNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

class graphql.validation.UniqueOperationTypesRule(context: SDLValidationContext)

Bases: SDLValidationRule

Unique operation types

A GraphQL document is only valid if it has only one type per operation.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: SDLValidationContext) → None

check_operation_types(node: graphql.language.ast.SchemaDefinitionNode | graphql.language.ast.SchemaExtensionNode, *_args: Any) → Optional[VisitorActionEnum]

context: SDLValidationContext

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_schema_definition(node: graphql.language.ast.SchemaDefinitionNode | graphql.language.ast.SchemaExtensionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_schema_extension(node: graphql.language.ast.SchemaDefinitionNode | graphql.language.ast.SchemaExtensionNode, *_args: Any) → Optional[VisitorActionEnum]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

class graphql.validation.UniqueTypeNamesRule(context: SDLValidationContext)

Bases: SDLValidationRule

Unique type names

A GraphQL document is only valid if all defined types have unique names.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: SDLValidationContext) → None

check_type_name(node: TypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

context: SDLValidationContext

enter_enum_type_definition(node: TypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_input_object_type_definition(node: TypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_interface_type_definition(node: TypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_object_type_definition(node: TypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_scalar_type_definition(node: TypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_union_type_definition(node: TypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

class graphql.validation.UniqueEnumValueNamesRule(context: SDLValidationContext)

Bases: SDLValidationRule

Unique enum value names

A GraphQL enum type is only valid if all its values are uniquely named.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: SDLValidationContext) → None

check_value_uniqueness(node: EnumTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

context: SDLValidationContext

enter_enum_type_definition(node: EnumTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_enum_type_extension(node: EnumTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

class graphql.validation.UniqueFieldDefinitionNamesRule(context: SDLValidationContext)

Bases: SDLValidationRule

Unique field definition names

A GraphQL complex type is only valid if all its fields are uniquely named.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: SDLValidationContext) → None

check_field_uniqueness(node: ObjectTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

context: SDLValidationContext

enter_input_object_type_definition(node: ObjectTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_input_object_type_extension(node: ObjectTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_interface_type_definition(node: ObjectTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_interface_type_extension(node: ObjectTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_object_type_definition(node: ObjectTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_object_type_extension(node: ObjectTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

class graphql.validation.UniqueArgumentDefinitionNamesRule(context: SDLValidationContext)

Bases: SDLValidationRule

Unique argument definition names

A GraphQL Object or Interface type is only valid if all its fields have uniquely named arguments. A GraphQL Directive is only valid if all its arguments are uniquely named.

See https://spec.graphql.org/draft/#sec-Argument-Uniqueness

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: SDLValidationContext) → None

check_arg_uniqueness(parent_name: str, argument_nodes: Collection[InputValueDefinitionNode]) → Optional[VisitorActionEnum]

check_arg_uniqueness_per_field(name: NameNode, fields: Collection[FieldDefinitionNode]) → Optional[VisitorActionEnum]

context: SDLValidationContext

enter_directive_definition(node: DirectiveDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_interface_type_definition(node: InterfaceTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_interface_type_extension(node: InterfaceTypeExtensionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_object_type_definition(node: ObjectTypeDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_object_type_extension(node: ObjectTypeExtensionNode, *_args: Any) → Optional[VisitorActionEnum]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

class graphql.validation.UniqueDirectiveNamesRule(context: SDLValidationContext)

Bases: SDLValidationRule

Unique directive names

A GraphQL document is only valid if all defined directives have unique names.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: SDLValidationContext) → None

context: SDLValidationContext

enter_directive_definition(node: DirectiveDefinitionNode, *_args: Any) → Optional[VisitorActionEnum]

enter_leave_map: dict[str, EnterLeaveVisitor]

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.

class graphql.validation.PossibleTypeExtensionsRule(context: SDLValidationContext)

Bases: SDLValidationRule

Possible type extension

A type extension is only valid if the type is defined and has the same kind.

BREAK = True

IDLE = None

REMOVE = Ellipsis

SKIP = False

__init__(context: SDLValidationContext) → None

check_extension(node: TypeExtensionNode, *_args: Any) → None

context: SDLValidationContext

enter_enum_type_extension(node: TypeExtensionNode, *_args: Any) → None

enter_input_object_type_extension(node: TypeExtensionNode, *_args: Any) → None

enter_interface_type_extension(node: TypeExtensionNode, *_args: Any) → None

enter_leave_map: dict[str, EnterLeaveVisitor]

enter_object_type_extension(node: TypeExtensionNode, *_args: Any) → None

enter_scalar_type_extension(node: TypeExtensionNode, *_args: Any) → None

enter_union_type_extension(node: TypeExtensionNode, *_args: Any) → None

get_enter_leave_for_kind(kind: str) → EnterLeaveVisitor: Given a node kind, return the EnterLeaveVisitor for that kind.

report_error(error: GraphQLError) → None: Report a GraphQL error.