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formatError.js
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formatError.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow strict
*/
import invariant from '../jsutils/invariant';
import { type GraphQLError } from './GraphQLError';
import { type SourceLocation } from '../language/location';
/**
* Given a GraphQLError, format it according to the rules described by the
* Response Format, Errors section of the GraphQL Specification.
*/
export function formatError(error: GraphQLError): GraphQLFormattedError {
invariant(error, 'Received null or undefined error.');
const message = error.message || 'An unknown error occurred.';
const locations = error.locations;
const path = error.path;
const extensions = error.extensions;
return extensions
? { message, locations, path, extensions }
: { message, locations, path };
}
export type GraphQLFormattedError = {|
+message: string,
+locations: $ReadOnlyArray<SourceLocation> | void,
+path: $ReadOnlyArray<string | number> | void,
+extensions?: { [key: string]: mixed },
|};