填充时出现Mongoose错误('model'不是函数)

时间:2012-08-12 14:49:35

标签: node.js mongodb mongoose

编辑/答案:这在mongoose> = 3.0中工作正常

我有一个类似的mongoose架构:

mongoose = require 'mongoose'
ObjectId = mongoose.Schema.ObjectId

VehicleSchema = new mongoose.Schema
  make: String
  model: String
  year: Number
  body: String
  fuel: String
  transmission: String
  parts: [ { type: ObjectId, ref: 'Part' } ]

VehicleSchema.virtual('display_name').get ->
  return this.make + ' ' + this.model + ' ' + this.year

VehicleModel = mongoose.model 'Vehicle', VehicleSchema

module.exports =
  Schema: VehicleSchema
  Model: VehicleModel

我将“零件”添加到车辆中:

Vehicle.Model.findById id, (err, vehicle) ->
      unless err
        part = new Part.Model {
          ...details
        }
        part.save (err, doc) ->
          unless err
            vehicle.parts.push doc
            vehicle.save()
          else
            console.error err

似乎有效:

{ "_id" : ObjectId("5027bd4340b00b897a000002"), "body" : "car", "fuel" : "unleaded", "make" : "stackover", "model" : "modelname", "parts" : [ ObjectId("5027bd5140b00b897a000006") ], "transmission" : "manual", "year" : 21212 }

但是当我尝试填充部件时:

Vehicle.Model
  .findById(vehicle_id)
  .populate('parts')
  .exec (err, doc) ->
    if err
      console.error err
    else
      console.error doc

我收到错误:

TypeError: Property 'model' of object { parts: [] } is not a function at model.populate [as _populate]

是什么给出的?我有另一个模型/控制器组合,几乎是这个完美工作的副本(我几乎找到/替换名词,它仍然打破,严重吓坏了!)

2 个答案:

答案 0 :(得分:3)

我认为很可能在内部使用名称“model”,而VehicleSchema的定义正在破坏mongoose希望成为具有“String”类型的函数的东西。

答案 1 :(得分:2)

架构中parts的定义很容易。 refs ref:不应该parts: [ { type: ObjectId, ref: "Part" } ]

{{1}}