node.js - Mongoose 嵌入式文档主细节回调序列

Question

我尝试在子项的预保存 Hook 中执行一些操作，但它似乎从未被触发。我只解雇了大师的预保存 Hook 。

我在 Javascript 中的模型

    var mongoose = require('mongoose');
mongoose.connect("localhost","test_master_details");

var masterSchema = mongoose.Schema({
  title:{type:String,required:true},
  childs: [childSchema]
});

masterSchema.pre('save',function(next){
  console.log("master pre save called!");
  console.log(this);
  next();
});

var childSchema = mongoose.Schema({
  number:{type:Number},
  name: {type:String,required:true}

});

childSchema.pre('save',function(next){
  this.number = 1;
  //set number with the total number of childs for the parent master
  console.log('child pre save called!');
  console.log(this);
  next();
});



module.exports = [mongoose.model('Child',childSchema), mongoose.model('Master',masterSchema)];

我在 CoffeeScript 中的规范:

 model_container = require('../models/master')

Master = model_container[1]
Child = model_container[0]
should = require('should')

describe "Master model",->
  before (done) ->
    Master.remove {},(err) ->
      console.log err if err
      done()
  it "should be able to create an instance",(done)->
    master = new Master {title:"Master of command"}
    master.save (err) ->
      console.log err if err
      should.exist master
      done()
  it "should be able to add 1 child", (done)->
    master= new Master {title:"Master of command"}
    master.childs.push {name:"hello world"}
    master.save (err) ->
      console.log err if err
      master.childs.length.should.eql 1
      done()
  it "should be able to add 1 child with create method",(done) ->
    master = new Master {title:"Master of command"}
    child = new Child {name:"childs name"}
    master.childs.push child
    master.save (err) ->
      console.log err if err
      master.childs.length.should.eql 1
      done()

这是我的规范结果 childs pre-save 从未被调用:

 Master model
    ◦ should be able to create an instance: master pre save called!
{ title: 'Master of command',
  _id: 50322715672b424e11000001,
  childs: [] }
    ✓ should be able to create an instance 
    ◦ should be able to add 1 child: master pre save called!
{ title: 'Master of command',
  _id: 50322715672b424e11000002,
  childs: [ { name: 'hello world' } ] }
    ✓ should be able to add 1 child 
    ◦ should be able to add 1 child with create method: master pre save called!
{ title: 'Master of command',
  _id: 50322715672b424e11000003,
  childs: [ { name: 'childs name', _id: 50322715672b424e11000004 } ] }
    ✓ should be able to add 1 child with create method 


  ✔ 3 tests complete (20ms)

我错过了什么吗？根据我的理解，每当我将 child 添加到集合中并在事后保存时， child 应该预先保存火。我做错了什么？我可以将 child 添加到大师收藏中并根据大师值预设值吗？

感谢您的帮助...

Answer 1

在 masterSchema 中引用它之前，您需要定义 childSchema，因此将它们切换为:

var childSchema = mongoose.Schema({
  number:{type:Number},
  name: {type:String,required:true}

});

childSchema.pre('save',function(next){
  this.number = 1;
  //set number with the total number of childs for the parent master
  console.log('child pre save called!');
  console.log(this);
  next();
});

var masterSchema = mongoose.Schema({
  title:{type:String,required:true},
  childs: [childSchema]
});

masterSchema.pre('save',function(next){
  console.log("master pre save called!");
  console.log(this);
  next();
});