resolver2.js

import {Cluster} from './cluster.js'
const graphqlFields = require('graphql-fields');
import * as _ from 'lodash'


const resolvers = {
  Query: {
    customer(root, args, context,info) { 
      var requested_fields = Object.keys(graphqlFields(info))
      var c = Cluster.findForUser(context,args.id)
      
      if(_.includes(requested_fields, 'contacts')) {
         c = c.populate('contacts')
      }
      
      return c.then((data) => {
        return [ data ]
      }).catch(error => {
        console.log(error)
      });
    }
  }
}