Exemplo n.º 1
0
// Extracts the root type of the operation from the schema.
func getOperationRootType(schema types.GraphQLSchema, operation ast.Definition, r chan *types.GraphQLResult) (objType *types.GraphQLObjectType) {
	if operation == nil {
		var result types.GraphQLResult
		err := graphqlerrors.NewGraphQLFormattedError("Can only execute queries and mutations")
		result.Errors = append(result.Errors, err)
		r <- &result
		return objType
	}
	switch operation.GetOperation() {
	case "query":
		return schema.GetQueryType()
	case "mutation":
		mutationType := schema.GetMutationType()
		if mutationType.Name == "" {
			var result types.GraphQLResult
			err := graphqlerrors.NewGraphQLFormattedError("Schema is not configured for mutations")
			result.Errors = append(result.Errors, err)
			r <- &result
			return objType
		}
		return mutationType
	default:
		var result types.GraphQLResult
		err := graphqlerrors.NewGraphQLFormattedError("Can only execute queries and mutations")
		result.Errors = append(result.Errors, err)
		r <- &result
		return objType
	}
}
Exemplo n.º 2
0
/**
 * This method looks up the field on the given type defintion.
 * It has special casing for the two introspection fields, __schema
 * and __typename. __typename is special because it can always be
 * queried as a field, even in situations where no other fields
 * are allowed, like on a Union. __schema could get automatically
 * added to the query type, but that would require mutating type
 * definitions, which would cause issues.
 */
func getFieldDef(schema types.GraphQLSchema, parentType *types.GraphQLObjectType, fieldName string) *types.GraphQLFieldDefinition {

	if parentType == nil {
		return nil
	}

	if fieldName == types.SchemaMetaFieldDef.Name &&
		schema.GetQueryType() == parentType {
		return types.SchemaMetaFieldDef
	}
	if fieldName == types.TypeMetaFieldDef.Name &&
		schema.GetQueryType() == parentType {
		return types.TypeMetaFieldDef
	}
	if fieldName == types.TypeNameMetaFieldDef.Name {
		return types.TypeNameMetaFieldDef
	}
	return parentType.GetFields()[fieldName]
}