Golang graphql.NewNonNull函數代碼示例

func TestTypeSystem_DefinitionExample_ProhibitsNestingNonNullInsideNonNull(t *testing.T) {
	ttype := graphql.NewNonNull(graphql.NewNonNull(graphql.Int))
	expected := `Can only create NonNull of a Nullable Type but got: Int!.`
	if ttype.Error().Error() != expected {
		t.Fatalf(`expected %v , got: %v`, expected, ttype.Error())
	}
}

func TestLists_NonNullListOfNonNullArrayOfFunc_ContainsNulls(t *testing.T) {
	ttype := graphql.NewNonNull(graphql.NewList(graphql.NewNonNull(graphql.Int)))

	// `data` is a slice of functions that return values
	// Note that its uses the expected signature `func() interface{} {...}`
	data := []interface{}{
		func() interface{} {
			return 1
		},
		func() interface{} {
			return nil
		},
		func() interface{} {
			return 2
		},
	}
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"nest": map[string]interface{}{
				"test": []interface{}{
					1, nil, 2,
				},
			},
		},
	}
	checkList(t, ttype, data, expected)
}

func TestTypeSystem_ObjectsMustAdhereToInterfaceTheyImplement_AcceptsAnObjectWithAnEquivalentlyModifiedInterfaceField(t *testing.T) {
	anotherInterface := graphql.NewInterface(graphql.InterfaceConfig{
		Name: "AnotherInterface",
		ResolveType: func(p graphql.ResolveTypeParams) *graphql.Object {
			return nil
		},
		Fields: graphql.Fields{
			"field": &graphql.Field{
				Type: graphql.NewNonNull(graphql.NewList(graphql.String)),
			},
		},
	})
	anotherObject := graphql.NewObject(graphql.ObjectConfig{
		Name:       "AnotherObject",
		Interfaces: []*graphql.Interface{anotherInterface},
		Fields: graphql.Fields{
			"field": &graphql.Field{
				Type: graphql.NewNonNull(graphql.NewList(graphql.String)),
			},
		},
	})
	_, err := schemaWithObjectFieldOfType(anotherObject)
	if err != nil {
		t.Fatalf(`unexpected error: %v for type "%v"`, err, anotherObject)
	}
}

func init() {
	nodeTestUserType = graphql.NewObject(graphql.ObjectConfig{
		Name: "User",
		Fields: graphql.Fields{
			"id": &graphql.Field{
				Type: graphql.NewNonNull(graphql.ID),
			},
			"name": &graphql.Field{
				Type: graphql.String,
			},
		},
		Interfaces: []*graphql.Interface{nodeTestDef.NodeInterface},
	})
	nodeTestPhotoType = graphql.NewObject(graphql.ObjectConfig{
		Name: "Photo",
		Fields: graphql.Fields{
			"id": &graphql.Field{
				Type: graphql.NewNonNull(graphql.ID),
			},
			"width": &graphql.Field{
				Type: graphql.Int,
			},
		},
		Interfaces: []*graphql.Interface{nodeTestDef.NodeInterface},
	})

	nodeTestSchema, _ = graphql.NewSchema(graphql.SchemaConfig{
		Query: nodeTestQueryType,
	})
}

func TestLists_NonNullListOfNonNullFunc_ReturnsNull(t *testing.T) {
	ttype := graphql.NewNonNull(graphql.NewList(graphql.NewNonNull(graphql.Int)))

	// `data` is a function that return values
	// Note that its uses the expected signature `func() interface{} {...}`
	data := func() interface{} {
		return nil
	}
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"nest": nil,
		},
		Errors: []gqlerrors.FormattedError{
			{
				Message: "Cannot return null for non-nullable field DataType.test.",
				Locations: []location.SourceLocation{
					{
						Line:   1,
						Column: 10,
					},
				},
			},
		},
	}
	checkList(t, ttype, data, expected)
}

func PluralIdentifyingRootField(config PluralIdentifyingRootFieldConfig) *graphql.Field {
	inputArgs := graphql.FieldConfigArgument{}
	if config.ArgName != "" {
		inputArgs[config.ArgName] = &graphql.ArgumentConfig{
			Type: graphql.NewNonNull(graphql.NewList(graphql.NewNonNull(config.InputType))),
		}
	}

	return &graphql.Field{
		Description: config.Description,
		Type:        graphql.NewList(config.OutputType),
		Args:        inputArgs,
		Resolve: func(p graphql.ResolveParams) (interface{}, error) {
			inputs, ok := p.Args[config.ArgName]
			if !ok {
				return nil, nil
			}

			if config.ResolveSingleInput == nil {
				return nil, nil
			}
			switch inputs := inputs.(type) {
			case []interface{}:
				res := []interface{}{}
				for _, input := range inputs {
					r := config.ResolveSingleInput(input)
					res = append(res, r)
				}
				return res, nil
			}
			return nil, nil
		},
	}
}

func TestTypeSystem_DefinitionExample_StringifiesSimpleTypes(t *testing.T) {

	type Test struct {
		ttype    graphql.Type
		expected string
	}
	tests := []Test{
		{graphql.Int, "Int"},
		{blogArticle, "Article"},
		{interfaceType, "Interface"},
		{unionType, "Union"},
		{enumType, "Enum"},
		{inputObjectType, "InputObject"},
		{graphql.NewNonNull(graphql.Int), "Int!"},
		{graphql.NewList(graphql.Int), "[Int]"},
		{graphql.NewNonNull(graphql.NewList(graphql.Int)), "[Int]!"},
		{graphql.NewList(graphql.NewNonNull(graphql.Int)), "[Int!]"},
		{graphql.NewList(graphql.NewList(graphql.Int)), "[[Int]]"},
	}
	for _, test := range tests {
		ttypeStr := fmt.Sprintf("%v", test.ttype)
		if ttypeStr != test.expected {
			t.Fatalf(`expected %v , got: %v`, test.expected, ttypeStr)
		}
	}
}

func MutationWithClientMutationID(config MutationConfig) *graphql.Field {

	augmentedInputFields := config.InputFields
	if augmentedInputFields == nil {
		augmentedInputFields = graphql.InputObjectConfigFieldMap{}
	}
	augmentedInputFields["clientMutationId"] = &graphql.InputObjectFieldConfig{
		Type: graphql.NewNonNull(graphql.String),
	}
	augmentedOutputFields := config.OutputFields
	if augmentedOutputFields == nil {
		augmentedOutputFields = graphql.Fields{}
	}
	augmentedOutputFields["clientMutationId"] = &graphql.Field{
		Type: graphql.NewNonNull(graphql.String),
	}

	inputType := graphql.NewInputObject(graphql.InputObjectConfig{
		Name:   config.Name + "Input",
		Fields: augmentedInputFields,
	})
	outputType := graphql.NewObject(graphql.ObjectConfig{
		Name:   config.Name + "Payload",
		Fields: augmentedOutputFields,
	})
	return &graphql.Field{
		Name: config.Name,
		Type: outputType,
		Args: graphql.FieldConfigArgument{
			"input": &graphql.ArgumentConfig{
				Type: graphql.NewNonNull(inputType),
			},
		},
		Resolve: func(p graphql.ResolveParams) (interface{}, error) {
			if config.MutateAndGetPayload == nil {
				return nil, nil
			}
			input := map[string]interface{}{}
			if inputVal, ok := p.Args["input"]; ok {
				if inputVal, ok := inputVal.(map[string]interface{}); ok {
					input = inputVal
				}
			}
			payload, err := config.MutateAndGetPayload(input, p.Info, p.Context)
			if err != nil {
				return nil, err
			}
			if clientMutationID, ok := input["clientMutationId"]; ok {
				payload["clientMutationId"] = clientMutationID
			}
			return payload, nil
		},
	}
}

func withModifiers(ttypes []graphql.Type) []graphql.Type {
	res := ttypes
	for _, ttype := range ttypes {
		res = append(res, graphql.NewList(ttype))
	}
	for _, ttype := range ttypes {
		res = append(res, graphql.NewNonNull(ttype))
	}
	for _, ttype := range ttypes {
		res = append(res, graphql.NewNonNull(graphql.NewList(ttype)))
	}
	return res
}

func TestTypeSystem_NonNullMustAcceptGraphQLTypes_RejectsNilAsNonNullableType(t *testing.T) {
	result := graphql.NewNonNull(nil)
	expectedError := `Can only create NonNull of a Nullable Type but got: <nil>.`
	if result.Error() == nil || result.Error().Error() != expectedError {
		t.Fatalf("Expected error: %v, got %v", expectedError, result.Error())
	}
}

func TestTypeSystem_DefinitionExample_IdentifiesOutputTypes(t *testing.T) {
	type Test struct {
		ttype    graphql.Type
		expected bool
	}
	tests := []Test{
		{graphql.Int, true},
		{objectType, true},
		{interfaceType, true},
		{unionType, true},
		{enumType, true},
		{inputObjectType, false},
	}
	for _, test := range tests {
		ttypeStr := fmt.Sprintf("%v", test.ttype)
		if graphql.IsOutputType(test.ttype) != test.expected {
			t.Fatalf(`expected %v , got: %v`, test.expected, ttypeStr)
		}
		if graphql.IsOutputType(graphql.NewList(test.ttype)) != test.expected {
			t.Fatalf(`expected %v , got: %v`, test.expected, ttypeStr)
		}
		if graphql.IsOutputType(graphql.NewNonNull(test.ttype)) != test.expected {
			t.Fatalf(`expected %v , got: %v`, test.expected, ttypeStr)
		}
	}
}

func TestLists_NullableListOfNonNullObjects_ContainsNull(t *testing.T) {
	ttype := graphql.NewList(graphql.NewNonNull(graphql.Int))
	data := []interface{}{
		1, nil, 2,
	}
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"nest": map[string]interface{}{
				"test": nil,
			},
		},
		Errors: []gqlerrors.FormattedError{
			{
				Message: "Cannot return null for non-nullable field DataType.test.",
				Locations: []location.SourceLocation{
					{
						Line:   1,
						Column: 10,
					},
				},
			},
		},
	}
	checkList(t, ttype, data, expected)
}

/*
Creates the configuration for an id field on a node, using `toGlobalId` to
construct the ID from the provided typename. The type-specific ID is fetcher
by calling idFetcher on the object, or if not provided, by accessing the `id`
property on the object.
*/
func GlobalIDField(typeName string, idFetcher GlobalIDFetcherFn) *graphql.Field {
	return &graphql.Field{
		Name:        "id",
		Description: "The ID of an object",
		Type:        graphql.NewNonNull(graphql.ID),
		Resolve: func(p graphql.ResolveParams) (interface{}, error) {
			id := ""
			if idFetcher != nil {
				fetched, err := idFetcher(p.Source, p.Info, p.Context)
				id = fmt.Sprintf("%v", fetched)
				if err != nil {
					return id, err
				}
			} else {
				// try to get from p.Source (data)
				var objMap interface{}
				b, _ := json.Marshal(p.Source)
				_ = json.Unmarshal(b, &objMap)
				switch obj := objMap.(type) {
				case map[string]interface{}:
					if iid, ok := obj["id"]; ok {
						id = fmt.Sprintf("%v", iid)
					}
				}
			}
			globalID := ToGlobalID(typeName, id)
			return globalID, nil
		},
	}
}

// Describe [T!]! Array<T>
func TestLists_NonNullListOfNonNullObjects_ContainsValues(t *testing.T) {
	ttype := graphql.NewNonNull(graphql.NewList(graphql.NewNonNull(graphql.Int)))
	data := []interface{}{
		1, 2,
	}
	expected := &graphql.Result{
		Data: map[string]interface{}{
			"nest": map[string]interface{}{
				"test": []interface{}{
					1, 2,
				},
			},
		},
	}
	checkList(t, ttype, data, expected)
}

func ConnectionDefinitions(config ConnectionConfig) *GraphQLConnectionDefinitions {

	edgeType := graphql.NewObject(graphql.ObjectConfig{
		Name:        config.Name + "Edge",
		Description: "An edge in a connection",
		Fields: graphql.Fields{
			"node": &graphql.Field{
				Type:        config.NodeType,
				Description: "The item at the end of the edge",
			},
			"cursor": &graphql.Field{
				Type:        graphql.NewNonNull(graphql.String),
				Description: " cursor for use in pagination",
			},
		},
	})
	for fieldName, fieldConfig := range config.EdgeFields {
		edgeType.AddFieldConfig(fieldName, fieldConfig)
	}

	connectionType := graphql.NewObject(graphql.ObjectConfig{
		Name:        config.Name + "Connection",
		Description: "A connection to a list of items.",

		Fields: graphql.Fields{
			"pageInfo": &graphql.Field{
				Type:        graphql.NewNonNull(pageInfoType),
				Description: "Information to aid in pagination.",
			},
			"edges": &graphql.Field{
				Type:        graphql.NewList(edgeType),
				Description: "Information to aid in pagination.",
			},
		},
	})
	for fieldName, fieldConfig := range config.ConnectionFields {
		connectionType.AddFieldConfig(fieldName, fieldConfig)
	}

	return &GraphQLConnectionDefinitions{
		EdgeType:       edgeType,
		ConnectionType: connectionType,
	}
}