Generic GraphQL middleware to capture errors
npm install graphql-middleware-error-handlerThis is a generic GraphQL middleware to handle errors that happen in resolvers.
It can be used with any error logging service (e.g. Sentry, Bugsnag).
This example uses graphql-yoga but it should be compatible with any other
library that supports graphql-middleware.
``ts
import { GraphQLServer } from 'graphql-yoga';
import { errorHandler } from 'graphql-middleware-error-handler';
const typeDefs =
type Query {
info: String!
error: String!
};
const resolvers = {
Query: {
hello: () => 'I am a GraphQL Server',
error: () => {
throw new Error('This was not supposed to happen');
},
},
};
const errorHandlerMiddleware = errorHandler({
onError: (error, context) => {
// send error anywhere
},
captureReturnedErrors: true,
forwardErrors: false,
});
const server = GraphQLServer({
typeDefs,
resolvers,
middlewares: [errorHandlerMiddleware],
});
server.start(() => 'Server running');
`
The only required option, the function that is called when an error occurs. It's
called with the error as first argument, and the GraphQL context as the second.
Determines if a resolver returns an error instead of throwing one it should
also be captured. Defaults to false.
Determines if the error should be rethrown after is was captured by the
middleware. Defaults to false`.
This project is licensed under the MIT License.