apollo server mutation resolver not called

This is my schema

const typeDefs = gql`
  type Query {
    users(pagestart: Int = 1, pagesize: Int = 10): UsersResponse
    user(id: ID!): User!
    me: User
  }

  type Mutation {
    addUser(user: UserRequest): UserResponse
    updateUser(user: UserRequest): UserResponse
    login(user: UserRequest): UserResponse
    logout: UserResponse
  }

This is my resolvers

module.exports = {
  Query: {
    // ...
  },
  Mutation: {
    addUser (_, { user }, { dataSources }) {
      return dataSources.UserDatasource.addUser(user)
    }
  }
}

When I sent a mutation, the resolvers mutation was not invoked. I added consoon.log in resolvers Mutation, which did not print on the console. Resolvers’ Query is all right. Any good Suggestions?

[dakshshah96]

@BengBu-YueZhang I’m facing the same issue with my Apollo GraphQL server. console.log statements in the mutation resolver are not executed and null is always returned. The mutation, however, shows up correctly in the GraphQL Playground schema but never gets executed.

Would love to know how you were able to solve this!

[BenjaminDavidMoore]

Probably a little late for the previous posters, but to help any future soles coming here in a time of desperation, I had the same issue (resolver always returning null and no logs being executed in the resolver) when using Apollo Server with Typescript. The issue for me was that I was importing my resolvers with a glob like so:

const resolversArray = loadFilesSync(path.join(__dirname, './**/*.resolvers.ts'));

Which when transpiled by Typescript, doesn’t change the glob pattern… note the .ts which means when you look at your transpiled version, it’s still looking for resolver files with the .ts extension. I recommend you either change your glob to

const resolversArray = loadFilesSync(path.join(__dirname, './**/*.resolvers.{ts,js}'));

Or manually / explicitly combine your resolvers yourself. Either way, I hope this helps, and if not, try looking to make sure you’ve properly brought in all of your resolvers!