Callback for graphQL mutation which is used via compose()

Question

How do I do a GraphQL mutation callback?

This is how my react component and the mutation looks like:

class CreateAccount extends Component {
  constructor () {
    super()
    this.state = {
      username: '',
      password: ''
    }
  }

  render () {
    return (
      // form with input fields; values get stored as state
    )
  }

  _createUser = async () => {
    const { username, password } = this.state
    await this.props.createUserMutation({
      variables: {
        username,
        password
      }
    })
  }
}

export default compose(
  withData,
  withApollo,
  graphql(
    gql`
      mutation RootMutationQuery($username: String!, $password: String!) {
        createUser(
          username: $username,
          password: $password,
        ) {
          _id
          username
          password
        }
      }
    `, { name: 'createUserMutation' }
  )
)(CreateAccount)

Answer 1

I would suggest you use the mutation as promise and when clicking the form submit you make the request.

Be aware that a login error can be retrieved in the .catch function. The error consists of an eventual network or graphql Error which need to be treated differently. See for example this post .

The Component could look like this:

 class CreateAccount extends Component { constructor(props) { super(props); this.state = { username: '', password: '' }; } render() { return ( // form with input fields; values get stored as state // on submit is handled for the form ); } _onSubmit = (event) => { event.preventDefault(); const { username, password } = this.state; this.props.createUserMutation({ variables: { username, password } }).then(response => { // data in response.data.createUser // set state eg handle login }).catch(error => { // handle error }); } } export default compose( graphql( gql ` mutation RootMutationQuery($username: String!, $password: String!) { createUser( username: $username, password: $password, ) { _id username password } } `, { name: 'createUserMutation' } ) )(CreateAccount)