问节点js和mongo、pre、后置挂钩中间件不在findByIdAndUpdate上执行。

EN

exports.import = function (req, res) {

    let file = fs.createReadStream(req.files.file.path)


    Papa.parse(file, {
        header: true,
        worker: true,
        preview: prev_val,

        complete: function (results) {

            let vehicles = _.each(results.data, function (value, key) {


                let condition = { VIN: value.VIN }

                Vehicle.model.findOneAndUpdate(condition, value, { upsert: true, new: true }, function (err, doc) {



                    }

  schema.pre('save', function (next) {
    console.log("HIT" , hit)
    if (this.isNew) {
      next()
    } else {
      console.log("this._original" , this._original)
      console.log("this._original1" , this)
      this._diff = getDiff(this, this._original)
      next()
    }
  })