seekaplayer.js

const {
  omit,
} = require('lodash')

transform() {
    const transformed = {}
    const fields = ['id', 'name', 'stats']

    fields.forEach((field) => {
      transformed[field] = this[field]
    })

    return transformed
  }
  
  const omitS = req.body.stats
  const updatedS = omit(req.body, omitS)
  
  updatedS.save()
    .then(savedS => res.json(savedS.transform()))
    .catch(e => next(e))