import "github.com/graphql-go/graphql"
definition.go directives.go executor.go extensions.go graphql.go introspection.go located.go rules.go rules_overlapping_fields_can_be_merged.go scalars.go schema.go type_info.go types.go util.go validator.go values.go
const (
// Operations
DirectiveLocationQuery = "QUERY"
DirectiveLocationMutation = "MUTATION"
DirectiveLocationSubscription = "SUBSCRIPTION"
DirectiveLocationField = "FIELD"
DirectiveLocationFragmentDefinition = "FRAGMENT_DEFINITION"
DirectiveLocationFragmentSpread = "FRAGMENT_SPREAD"
DirectiveLocationInlineFragment = "INLINE_FRAGMENT"
// Schema Definitions
DirectiveLocationSchema = "SCHEMA"
DirectiveLocationScalar = "SCALAR"
DirectiveLocationObject = "OBJECT"
DirectiveLocationFieldDefinition = "FIELD_DEFINITION"
DirectiveLocationArgumentDefinition = "ARGUMENT_DEFINITION"
DirectiveLocationInterface = "INTERFACE"
DirectiveLocationUnion = "UNION"
DirectiveLocationEnum = "ENUM"
DirectiveLocationEnumValue = "ENUM_VALUE"
DirectiveLocationInputObject = "INPUT_OBJECT"
DirectiveLocationInputFieldDefinition = "INPUT_FIELD_DEFINITION"
)const (
TypeKindScalar = "SCALAR"
TypeKindObject = "OBJECT"
TypeKindInterface = "INTERFACE"
TypeKindUnion = "UNION"
TypeKindEnum = "ENUM"
TypeKindInputObject = "INPUT_OBJECT"
TypeKindList = "LIST"
TypeKindNonNull = "NON_NULL"
)const DefaultDeprecationReason = "No longer supported"DefaultDeprecationReason Constant string used for default reason for a deprecation.
const TAG = "json"var Boolean = NewScalar(ScalarConfig{ Name: "Boolean", Description: "The `Boolean` scalar type represents `true` or `false`.", Serialize: coerceBool, ParseValue: coerceBool, ParseLiteral: func(valueAST ast.Value) interface{} { switch valueAST := valueAST.(type) { case *ast.BooleanValue: return valueAST.Value } return nil }, })
Boolean is the GraphQL boolean type definition
var DateTime = NewScalar(ScalarConfig{ Name: "DateTime", Description: "The `DateTime` scalar type represents a DateTime." + " The DateTime is serialized as an RFC 3339 quoted string", Serialize: serializeDateTime, ParseValue: unserializeDateTime, ParseLiteral: func(valueAST ast.Value) interface{} { switch valueAST := valueAST.(type) { case *ast.StringValue: return unserializeDateTime(valueAST.Value) } return nil }, })
var DeprecatedDirective = NewDirective(DirectiveConfig{ Name: "deprecated", Description: "Marks an element of a GraphQL schema as no longer supported.", Args: FieldConfigArgument{ "reason": &ArgumentConfig{ Type: String, Description: "Explains why this element was deprecated, usually also including a " + "suggestion for how to access supported similar data. Formatted" + "in [Markdown](https://daringfireball.net/projects/markdown/).", DefaultValue: DefaultDeprecationReason, }, }, Locations: []string{ DirectiveLocationFieldDefinition, DirectiveLocationEnumValue, }, })
DeprecatedDirective Used to declare element of a GraphQL schema as deprecated.
var Float = NewScalar(ScalarConfig{ Name: "Float", Description: "The `Float` scalar type represents signed double-precision fractional " + "values as specified by " + "[IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point). ", Serialize: coerceFloat, ParseValue: coerceFloat, ParseLiteral: func(valueAST ast.Value) interface{} { switch valueAST := valueAST.(type) { case *ast.FloatValue: if floatValue, err := strconv.ParseFloat(valueAST.Value, 64); err == nil { return floatValue } case *ast.IntValue: if floatValue, err := strconv.ParseFloat(valueAST.Value, 32); err == nil { return floatValue } } return nil }, })
Float is the GraphQL float type definition.
var ID = NewScalar(ScalarConfig{ Name: "ID", Description: "The `ID` scalar type represents a unique identifier, often used to " + "refetch an object or as key for a cache. The ID type appears in a JSON " + "response as a String; however, it is not intended to be human-readable. " + "When expected as an input type, any string (such as `\"4\"`) or integer " + "(such as `4`) input value will be accepted as an ID.", Serialize: coerceString, ParseValue: coerceString, ParseLiteral: func(valueAST ast.Value) interface{} { switch valueAST := valueAST.(type) { case *ast.IntValue: return valueAST.Value case *ast.StringValue: return valueAST.Value } return nil }, })
ID is the GraphQL id type definition
var IncludeDirective = NewDirective(DirectiveConfig{ Name: "include", Description: "Directs the executor to include this field or fragment only when " + "the `if` argument is true.", Locations: []string{ DirectiveLocationField, DirectiveLocationFragmentSpread, DirectiveLocationInlineFragment, }, Args: FieldConfigArgument{ "if": &ArgumentConfig{ Type: NewNonNull(Boolean), Description: "Included when true.", }, }, })
IncludeDirective is used to conditionally include fields or fragments.
var Int = NewScalar(ScalarConfig{ Name: "Int", Description: "The `Int` scalar type represents non-fractional signed whole numeric " + "values. Int can represent values between -(2^31) and 2^31 - 1. ", Serialize: coerceInt, ParseValue: coerceInt, ParseLiteral: func(valueAST ast.Value) interface{} { switch valueAST := valueAST.(type) { case *ast.IntValue: if intValue, err := strconv.Atoi(valueAST.Value); err == nil { return intValue } } return nil }, })
Int is the GraphQL Integer type definition.
var NameRegExp = regexp.MustCompile("^[_a-zA-Z][_a-zA-Z0-9]*$")
var SkipDirective = NewDirective(DirectiveConfig{ Name: "skip", Description: "Directs the executor to skip this field or fragment when the `if` " + "argument is true.", Args: FieldConfigArgument{ "if": &ArgumentConfig{ Type: NewNonNull(Boolean), Description: "Skipped when true.", }, }, Locations: []string{ DirectiveLocationField, DirectiveLocationFragmentSpread, DirectiveLocationInlineFragment, }, })
SkipDirective Used to conditionally skip (exclude) fields or fragments.
var SpecifiedDirectives = []*Directive{ IncludeDirective, SkipDirective, DeprecatedDirective, }
SpecifiedRules The full list of specified directives.
var SpecifiedRules = []ValidationRuleFn{ ArgumentsOfCorrectTypeRule, DefaultValuesOfCorrectTypeRule, FieldsOnCorrectTypeRule, FragmentsOnCompositeTypesRule, KnownArgumentNamesRule, KnownDirectivesRule, KnownFragmentNamesRule, KnownTypeNamesRule, LoneAnonymousOperationRule, NoFragmentCyclesRule, NoUndefinedVariablesRule, NoUnusedFragmentsRule, NoUnusedVariablesRule, OverlappingFieldsCanBeMergedRule, PossibleFragmentSpreadsRule, ProvidedNonNullArgumentsRule, ScalarLeafsRule, UniqueArgumentNamesRule, UniqueFragmentNamesRule, UniqueInputFieldNamesRule, UniqueOperationNamesRule, UniqueVariableNamesRule, VariablesAreInputTypesRule, VariablesInAllowedPositionRule, }
SpecifiedRules set includes all validation rules defined by the GraphQL spec.
var String = NewScalar(ScalarConfig{ Name: "String", Description: "The `String` scalar type represents textual data, represented as UTF-8 " + "character sequences. The String type is most often used by GraphQL to " + "represent free-form human-readable text.", Serialize: coerceString, ParseValue: coerceString, ParseLiteral: func(valueAST ast.Value) interface{} { switch valueAST := valueAST.(type) { case *ast.StringValue: return valueAST.Value } return nil }, })
String is the GraphQL string type definition
func DefaultResolveFn(p ResolveParams) (interface{}, error)
DefaultResolveFn If a resolve function is not given, then a default resolve behavior is used which takes the property of the source object of the same name as the field and returns it as the result, or if it's a function, returns the result of calling that function.
IsCompositeType determines if given type is a GraphQLComposite type
IsInputType determines if given type is a GraphQLInputType
IsLeafType determines if given type is a leaf value
IsOutputType determines if given type is a GraphQLOutputType
func NewLocatedErrorWithPath(err interface{}, nodes []ast.Node, path []interface{}) *gqlerrors.Errorfunc UndefinedFieldMessage(fieldName string, ttypeName string, suggestedTypeNames []string, suggestedFieldNames []string) string
func VisitUsingRules(schema *Schema, typeInfo *TypeInfo, astDoc *ast.Document, rules []ValidationRuleFn) []gqlerrors.FormattedError
VisitUsingRules This uses a specialized visitor which runs multiple visitors in parallel, while maintaining the visitor skip and break API.
@internal Had to expose it to unit test experimental customizable validation feature, but not meant for public consumption
Abstract interface for types that may describe the parent context of a selection set.
type Argument struct {
PrivateName string `json:"name"`
Type Input `json:"type"`
DefaultValue interface{} `json:"defaultValue"`
PrivateDescription string `json:"description"`
}type ArgumentConfig struct {
Type Input `json:"type"`
DefaultValue interface{} `json:"defaultValue"`
Description string `json:"description"`
}Composite interface for types that may describe the parent context of a selection set.
type Directive struct {
Name string `json:"name"`
Description string `json:"description"`
Locations []string `json:"locations"`
Args []*Argument `json:"args"`
// contains filtered or unexported fields
}Directive structs are used by the GraphQL runtime as a way of modifying execution behavior. Type system creators will usually not create these directly.
func NewDirective(config DirectiveConfig) *Directive
type DirectiveConfig struct {
Name string `json:"name"`
Description string `json:"description"`
Locations []string `json:"locations"`
Args FieldConfigArgument `json:"args"`
}DirectiveConfig options for creating a new GraphQLDirective
type Enum struct {
PrivateName string `json:"name"`
PrivateDescription string `json:"description"`
// contains filtered or unexported fields
}DirectiveLocationEnumType is type definition for __DirectiveLocation
TypeKindEnumType is type definition for __TypeKind
func NewEnum(config EnumConfig) *Enum
func (gt *Enum) Values() []*EnumValueDefinition
type EnumConfig struct {
Name string `json:"name"`
Values EnumValueConfigMap `json:"values"`
Description string `json:"description"`
}type EnumValueConfig struct {
Value interface{} `json:"value"`
DeprecationReason string `json:"deprecationReason"`
Description string `json:"description"`
}type EnumValueConfigMap map[string]*EnumValueConfig
type EnumValueDefinition struct {
Name string `json:"name"`
Value interface{} `json:"value"`
DeprecationReason string `json:"deprecationReason"`
Description string `json:"description"`
}type ExecuteParams struct {
Schema Schema
Root interface{}
AST *ast.Document
OperationName string
Args map[string]interface{}
// Context may be provided to pass application-specific per-request
// information to resolve functions.
Context context.Context
}ExecutionFinishFunc is called when the execution is done
type Extension interface {
// Init is used to help you initialize the extension
Init(context.Context, *Params) context.Context
// Name returns the name of the extension (make sure it's custom)
Name() string
// ParseDidStart is being called before starting the parse
ParseDidStart(context.Context) (context.Context, ParseFinishFunc)
// ValidationDidStart is called just before the validation begins
ValidationDidStart(context.Context) (context.Context, ValidationFinishFunc)
// ExecutionDidStart notifies about the start of the execution
ExecutionDidStart(context.Context) (context.Context, ExecutionFinishFunc)
// ResolveFieldDidStart notifies about the start of the resolving of a field
ResolveFieldDidStart(context.Context, *ResolveInfo) (context.Context, ResolveFieldFinishFunc)
// HasResult returns if the extension wants to add data to the result
HasResult() bool
// GetResult returns the data that the extension wants to add to the result
GetResult(context.Context) interface{}
}Extension is an interface for extensions in graphql
type Field struct {
Name string `json:"name"` // used by graphlql-relay
Type Output `json:"type"`
Args FieldConfigArgument `json:"args"`
Resolve FieldResolveFn `json:"-"`
DeprecationReason string `json:"deprecationReason"`
Description string `json:"description"`
}type FieldArgument struct {
Name string `json:"name"`
Type Type `json:"type"`
DefaultValue interface{} `json:"defaultValue"`
Description string `json:"description"`
}type FieldConfigArgument map[string]*ArgumentConfig
func BindArg(obj interface{}, tags ...string) FieldConfigArgumentlazy way of binding args
type FieldDefinition struct {
Name string `json:"name"`
Description string `json:"description"`
Type Output `json:"type"`
Args []*Argument `json:"args"`
Resolve FieldResolveFn `json:"-"`
DeprecationReason string `json:"deprecationReason"`
}var SchemaMetaFieldDef *FieldDefinition
SchemaMetaFieldDef Meta field definition for Schema
var TypeMetaFieldDef *FieldDefinition
TypeMetaFieldDef Meta field definition for types
var TypeNameMetaFieldDef *FieldDefinition
TypeNameMetaFieldDef Meta field definition for type names
func DefaultTypeInfoFieldDef(schema *Schema, parentType Type, fieldAST *ast.Field) *FieldDefinition
DefaultTypeInfoFieldDef Not exactly the same as the executor's definition of FieldDef, in this statically evaluated environment we do not always have an Object type, and need to handle Interface and Union types.
type FieldDefinitionMap map[string]*FieldDefinition
type FieldResolveFn func(p ResolveParams) (interface{}, error)
type FieldResolver interface {
// Resolve resolves the value for the given ResolveParams. It has the same semantics as FieldResolveFn.
Resolve(p ResolveParams) (interface{}, error)
}FieldResolver is used in DefaultResolveFn when the the source value implements this interface.
can't take recursive slice type e.g type Person struct{
Friends []Person
} it will throw panic stack-overflow
type HasSelectionSet interface {
GetKind() string
GetLoc() *ast.Location
GetSelectionSet() *ast.SelectionSet
}Input interface for types that may be used as input types for arguments and directives.
type InputObject struct {
PrivateName string `json:"name"`
PrivateDescription string `json:"description"`
// contains filtered or unexported fields
}InputObject Type Definition
An input object defines a structured collection of fields which may be supplied to a field argument.
Example:
var GeoPoint = new InputObject({
name: 'GeoPoint',
fields: {
lat: { type: new NonNull(Float) },
lon: { type: new NonNull(Float) },
alt: { type: Float, defaultValue: 0 },
}
});
func NewInputObject(config InputObjectConfig) *InputObject
func (gt *InputObject) AddFieldConfig(fieldName string, fieldConfig *InputObjectFieldConfig)
func (gt *InputObject) Description() string
func (gt *InputObject) Error() error
func (gt *InputObject) Fields() InputObjectFieldMap
func (gt *InputObject) Name() string
func (gt *InputObject) String() string
type InputObjectConfig struct {
Name string `json:"name"`
Fields interface{} `json:"fields"`
Description string `json:"description"`
}type InputObjectConfigFieldMap map[string]*InputObjectFieldConfig
type InputObjectConfigFieldMapThunk func() InputObjectConfigFieldMap
type InputObjectField struct {
PrivateName string `json:"name"`
Type Input `json:"type"`
DefaultValue interface{} `json:"defaultValue"`
PrivateDescription string `json:"description"`
}func (st *InputObjectField) Description() string
func (st *InputObjectField) Error() error
func (st *InputObjectField) Name() string
func (st *InputObjectField) String() string
type InputObjectFieldConfig struct {
Type Input `json:"type"`
DefaultValue interface{} `json:"defaultValue"`
Description string `json:"description"`
}type InputObjectFieldMap map[string]*InputObjectField
type Interface struct {
PrivateName string `json:"name"`
PrivateDescription string `json:"description"`
ResolveType ResolveTypeFn
// contains filtered or unexported fields
}Interface Type Definition
When a field can return one of a heterogeneous set of types, a Interface type is used to describe what types are possible, what fields are in common across all types, as well as a function to determine which type is actually used when the field is resolved.
Example:
var EntityType = new Interface({
name: 'Entity',
fields: {
name: { type: String }
}
});
func NewInterface(config InterfaceConfig) *Interface
func (it *Interface) Fields() (fields FieldDefinitionMap)
type InterfaceConfig struct {
Name string `json:"name"`
Fields interface{} `json:"fields"`
ResolveType ResolveTypeFn
Description string `json:"description"`
}type IsTypeOfFn func(p IsTypeOfParams) bool
type IsTypeOfParams struct {
// Value that needs to be resolve.
// Use this to decide which GraphQLObject this value maps to.
Value interface{}
// Info is a collection of information about the current execution state.
Info ResolveInfo
// Context argument is a context value that is provided to every resolve function within an execution.
// It is commonly
// used to represent an authenticated user, or request-specific caches.
Context context.Context
}IsTypeOfParams Params for IsTypeOfFn()
type Leaf interface {
Name() string
Description() string
String() string
Error() error
Serialize(value interface{}) interface{}
}Leaf interface for types that may be leaf values
List Modifier
A list is a kind of type marker, a wrapping type which points to another type. Lists are often created within the context of defining the fields of an object type.
Example:
var PersonType = new Object({
name: 'Person',
fields: () => ({
parents: { type: new List(Person) },
children: { type: new List(Person) },
})
})
Named interface for types that do not include modifiers like List or NonNull.
GetNamed returns the Named type of the given GraphQL type
NonNull Modifier
A non-null is a kind of type marker, a wrapping type which points to another type. Non-null types enforce that their values are never null and can ensure an error is raised if this ever occurs during a request. It is useful for fields which you can make a strong guarantee on non-nullability, for example usually the id field of a database row will never be null.
Example:
var RowType = new Object({
name: 'Row',
fields: () => ({
id: { type: new NonNull(String) },
})
})
Note: the enforcement of non-nullability occurs within the executor.
type Nullable interface {
}Nullable interface for types that can accept null as a value.
GetNullable returns the Nullable type of the given GraphQL type
type Object struct {
PrivateName string `json:"name"`
PrivateDescription string `json:"description"`
IsTypeOf IsTypeOfFn
// contains filtered or unexported fields
}Object Type Definition
Almost all of the GraphQL types you define will be object Object types have a name, but most importantly describe their fields. Example:
var AddressType = new Object({
name: 'Address',
fields: {
street: { type: String },
number: { type: Int },
formatted: {
type: String,
resolve(obj) {
return obj.number + ' ' + obj.street
}
}
}
});
When two types need to refer to each other, or a type needs to refer to itself in a field, you can use a function expression (aka a closure or a thunk) to supply the fields lazily.
Example:
var PersonType = new Object({
name: 'Person',
fields: () => ({
name: { type: String },
bestFriend: { type: PersonType },
})
});
/
DirectiveType is type definition for __Directive
EnumValueType is type definition for __EnumValue
FieldType is type definition for __Field
InputValueType is type definition for __InputValue
SchemaType is type definition for __Schema
TypeType is type definition for __Type
func NewObject(config ObjectConfig) *Object
func (gt *Object) Fields() FieldDefinitionMap
type ObjectConfig struct {
Name string `json:"name"`
Interfaces interface{} `json:"interfaces"`
Fields interface{} `json:"fields"`
IsTypeOf IsTypeOfFn `json:"isTypeOf"`
Description string `json:"description"`
}Output interface for types that may be used as output types as the result of fields.
type Params struct {
// The GraphQL type system to use when validating and executing a query.
Schema Schema
// A GraphQL language formatted string representing the requested operation.
RequestString string
// The value provided as the first argument to resolver functions on the top
// level type (e.g. the query object type).
RootObject map[string]interface{}
// A mapping of variable name to runtime value to use for all variables
// defined in the requestString.
VariableValues map[string]interface{}
// The name of the operation to use if requestString contains multiple
// possible operations. Can be omitted if requestString contains only
// one operation.
OperationName string
// Context may be provided to pass application-specific per-request
// information to resolve functions.
Context context.Context
}ParseFinishFunc is called when the parse of the query is done
ParseLiteralFn is a function type for parsing the literal value of a GraphQLScalar type
type ParseValueFn func(value interface{}) interface{}ParseValueFn is a function type for parsing the value of a GraphQLScalar type
ResolveFieldFinishFunc is called with the result of the ResolveFn and the error it returned
type ResolveInfo struct {
FieldName string
FieldASTs []*ast.Field
Path *ResponsePath
ReturnType Output
ParentType Composite
Schema Schema
Fragments map[string]ast.Definition
RootValue interface{}
Operation ast.Definition
VariableValues map[string]interface{}
}type ResolveParams struct {
// Source is the source value
Source interface{}
// Args is a map of arguments for current GraphQL request
Args map[string]interface{}
// Info is a collection of information about the current execution state.
Info ResolveInfo
// Context argument is a context value that is provided to every resolve function within an execution.
// It is commonly
// used to represent an authenticated user, or request-specific caches.
Context context.Context
}ResolveParams Params for FieldResolveFn()
type ResolveTypeFn func(p ResolveTypeParams) *Object
type ResolveTypeParams struct {
// Value that needs to be resolve.
// Use this to decide which GraphQLObject this value maps to.
Value interface{}
// Info is a collection of information about the current execution state.
Info ResolveInfo
// Context argument is a context value that is provided to every resolve function within an execution.
// It is commonly
// used to represent an authenticated user, or request-specific caches.
Context context.Context
}ResolveTypeParams Params for ResolveTypeFn()
type ResponsePath struct {
Prev *ResponsePath
Key interface{}
}func (p *ResponsePath) AsArray() []interface{}
AsArray returns an array of path keys.
func (p *ResponsePath) WithKey(key interface{}) *ResponsePath
WithKey returns a new responsePath containing the new key.
type Result struct {
Data interface{} `json:"data"`
Errors []gqlerrors.FormattedError `json:"errors,omitempty"`
Extensions map[string]interface{} `json:"extensions,omitempty"`
}Result has the response, errors and extensions from the resolved schema
func Execute(p ExecuteParams) (result *Result)
HasErrors just a simple function to help you decide if the result has errors or not
type Scalar struct {
PrivateName string `json:"name"`
PrivateDescription string `json:"description"`
// contains filtered or unexported fields
}Scalar Type Definition
The leaf values of any request and input values to arguments are Scalars (or Enums) and are defined with a name and a series of functions used to parse input from ast or variables and to ensure validity.
Example:
var OddType = new Scalar({
name: 'Odd',
serialize(value) {
return value % 2 === 1 ? value : null;
}
});
func NewScalar(config ScalarConfig) *Scalar
NewScalar creates a new GraphQLScalar
type ScalarConfig struct {
Name string `json:"name"`
Description string `json:"description"`
Serialize SerializeFn
ParseValue ParseValueFn
ParseLiteral ParseLiteralFn
}ScalarConfig options for creating a new GraphQLScalar
type Schema struct {
// contains filtered or unexported fields
}Schema Definition A Schema is created by supplying the root types of each type of operation, query, mutation (optional) and subscription (optional). A schema definition is then supplied to the validator and executor. Example:
myAppSchema, err := NewSchema(SchemaConfig({
Query: MyAppQueryRootType,
Mutation: MyAppMutationRootType,
Subscription: MyAppSubscriptionRootType,
});
Note: If an array of `directives` are provided to GraphQLSchema, that will be the exact list of directives represented and allowed. If `directives` is not provided then a default set of the specified directives (e.g. @include and @skip) will be used. If you wish to provide *additional* directives to these specified directives, you must explicitly declare them. Example:
const MyAppSchema = new GraphQLSchema({
...
directives: specifiedDirectives.concat([ myCustomDirective ]),
})
func NewSchema(config SchemaConfig) (Schema, error)
AddExtensions can be used to add additional extensions to the schema
Added Check implementation of interfaces at runtime.. Add Implementations at Runtime..
Edited. To check add Types at RunTime.. Append Runtime schema to typeMap
type SchemaConfig struct {
Query *Object
Mutation *Object
Subscription *Object
Types []Type
Directives []*Directive
Extensions []Extension
}type SerializeFn func(value interface{}) interface{}SerializeFn is a function type for serializing a GraphQLScalar type value
Type interface for all of the possible kinds of GraphQL types
type TypeInfo struct {
// contains filtered or unexported fields
}func NewTypeInfo(opts *TypeInfoConfig) *TypeInfo
func (ti *TypeInfo) FieldDef() *FieldDefinition
type TypeInfoConfig struct {
Schema *Schema
// NOTE: this experimental optional second parameter is only needed in order
// to support non-spec-compliant codebases. You should never need to use it.
// It may disappear in the future.
FieldDefFn fieldDefFn
}type Union struct {
PrivateName string `json:"name"`
PrivateDescription string `json:"description"`
ResolveType ResolveTypeFn
// contains filtered or unexported fields
}Union Type Definition
When a field can return one of a heterogeneous set of types, a Union type is used to describe what types are possible as well as providing a function to determine which type is actually used when the field is resolved.
Example:
var PetType = new Union({
name: 'Pet',
types: [ DogType, CatType ],
resolveType(value) {
if (value instanceof Dog) {
return DogType;
}
if (value instanceof Cat) {
return CatType;
}
}
});
func NewUnion(config UnionConfig) *Union
type UnionConfig struct {
Name string `json:"name"`
Types []*Object `json:"types"`
ResolveType ResolveTypeFn
Description string `json:"description"`
}type ValidationContext struct {
// contains filtered or unexported fields
}func NewValidationContext(schema *Schema, astDoc *ast.Document, typeInfo *TypeInfo) *ValidationContext
func (ctx *ValidationContext) Argument() *Argument
func (ctx *ValidationContext) Directive() *Directive
func (ctx *ValidationContext) Document() *ast.Document
func (ctx *ValidationContext) Errors() []gqlerrors.FormattedError
func (ctx *ValidationContext) FieldDef() *FieldDefinition
func (ctx *ValidationContext) Fragment(name string) *ast.FragmentDefinition
func (ctx *ValidationContext) FragmentSpreads(node *ast.SelectionSet) []*ast.FragmentSpread
func (ctx *ValidationContext) InputType() Input
func (ctx *ValidationContext) ParentType() Composite
func (ctx *ValidationContext) RecursiveVariableUsages(operation *ast.OperationDefinition) []*VariableUsage
func (ctx *ValidationContext) RecursivelyReferencedFragments(operation *ast.OperationDefinition) []*ast.FragmentDefinition
func (ctx *ValidationContext) ReportError(err error)
func (ctx *ValidationContext) Schema() *Schema
func (ctx *ValidationContext) Type() Output
func (ctx *ValidationContext) VariableUsages(node HasSelectionSet) []*VariableUsage
type ValidationFinishFunc func([]gqlerrors.FormattedError)
ValidationFinishFunc is called when the Validation of the query is finished
type ValidationResult struct {
IsValid bool
Errors []gqlerrors.FormattedError
}func ValidateDocument(schema *Schema, astDoc *ast.Document, rules []ValidationRuleFn) (vr ValidationResult)
type ValidationRuleFn func(context *ValidationContext) *ValidationRuleInstance
type ValidationRuleInstance struct {
VisitorOpts *visitor.VisitorOptions
}func ArgumentsOfCorrectTypeRule(context *ValidationContext) *ValidationRuleInstance
ArgumentsOfCorrectTypeRule Argument values of correct type
A GraphQL document is only valid if all field argument literal values are of the type expected by their position.
func DefaultValuesOfCorrectTypeRule(context *ValidationContext) *ValidationRuleInstance
DefaultValuesOfCorrectTypeRule Variable default values of correct type
A GraphQL document is only valid if all variable default values are of the type expected by their definition.
func FieldsOnCorrectTypeRule(context *ValidationContext) *ValidationRuleInstance
FieldsOnCorrectTypeRule 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 __typenamme
func FragmentsOnCompositeTypesRule(context *ValidationContext) *ValidationRuleInstance
FragmentsOnCompositeTypesRule 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.
func KnownArgumentNamesRule(context *ValidationContext) *ValidationRuleInstance
KnownArgumentNamesRule Known argument names
A GraphQL field is only valid if all supplied arguments are defined by that field.
func KnownDirectivesRule(context *ValidationContext) *ValidationRuleInstance
KnownDirectivesRule Known directives
A GraphQL document is only valid if all `@directives` are known by the schema and legally positioned.
func KnownFragmentNamesRule(context *ValidationContext) *ValidationRuleInstance
KnownFragmentNamesRule Known fragment names
A GraphQL document is only valid if all `...Fragment` fragment spreads refer to fragments defined in the same document.
func KnownTypeNamesRule(context *ValidationContext) *ValidationRuleInstance
KnownTypeNamesRule Known type names
A GraphQL document is only valid if referenced types (specifically variable definitions and fragment conditions) are defined by the type schema.
func LoneAnonymousOperationRule(context *ValidationContext) *ValidationRuleInstance
LoneAnonymousOperationRule 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.
func NoFragmentCyclesRule(context *ValidationContext) *ValidationRuleInstance
NoFragmentCyclesRule No fragment cycles
func NoUndefinedVariablesRule(context *ValidationContext) *ValidationRuleInstance
NoUndefinedVariablesRule No undefined variables
A GraphQL operation is only valid if all variables encountered, both directly and via fragment spreads, are defined by that operation.
func NoUnusedFragmentsRule(context *ValidationContext) *ValidationRuleInstance
NoUnusedFragmentsRule 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.
func NoUnusedVariablesRule(context *ValidationContext) *ValidationRuleInstance
NoUnusedVariablesRule 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.
func OverlappingFieldsCanBeMergedRule(context *ValidationContext) *ValidationRuleInstance
OverlappingFieldsCanBeMergedRule 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.
func PossibleFragmentSpreadsRule(context *ValidationContext) *ValidationRuleInstance
PossibleFragmentSpreadsRule 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.
func ProvidedNonNullArgumentsRule(context *ValidationContext) *ValidationRuleInstance
ProvidedNonNullArgumentsRule Provided required arguments
A field or directive is only valid if all required (non-null) field arguments have been provided.
func ScalarLeafsRule(context *ValidationContext) *ValidationRuleInstance
ScalarLeafsRule Scalar leafs
A GraphQL document is valid only if all leaf fields (fields without sub selections) are of scalar or enum types.
func UniqueArgumentNamesRule(context *ValidationContext) *ValidationRuleInstance
UniqueArgumentNamesRule Unique argument names
A GraphQL field or directive is only valid if all supplied arguments are uniquely named.
func UniqueFragmentNamesRule(context *ValidationContext) *ValidationRuleInstance
UniqueFragmentNamesRule Unique fragment names
A GraphQL document is only valid if all defined fragments have unique names.
func UniqueInputFieldNamesRule(context *ValidationContext) *ValidationRuleInstance
UniqueInputFieldNamesRule Unique input field names
A GraphQL input object value is only valid if all supplied fields are uniquely named.
func UniqueOperationNamesRule(context *ValidationContext) *ValidationRuleInstance
UniqueOperationNamesRule Unique operation names
A GraphQL document is only valid if all defined operations have unique names.
func UniqueVariableNamesRule(context *ValidationContext) *ValidationRuleInstance
UniqueVariableNamesRule Unique variable names
A GraphQL operation is only valid if all its variables are uniquely named.
func VariablesAreInputTypesRule(context *ValidationContext) *ValidationRuleInstance
VariablesAreInputTypesRule 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).
func VariablesInAllowedPositionRule(context *ValidationContext) *ValidationRuleInstance
VariablesInAllowedPositionRule Variables passed to field arguments conform to type
Package graphql imports 18 packages (graph) and is imported by 331 packages. Updated 2019-04-03. Refresh now. Tools for package owners.