Question

我尝试在子项的预保存挂钩中执行某些操作，但它似乎永远不会被触发。我只获得了主人的预保存挂钩。

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)];

我在咖啡脚本中的规格：

 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()

以下是我的规范结果从未调用过pre-save的子项：

 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，每当我将一个孩子添加到集合中并将其保存后，孩子就会预防火灾。我做错了什么？我可以将一个子项添加到母版集合中，并根据母版值预先设置值吗？

感谢您的帮助......

Answer 1

在childSchema中引用masterSchema之前，您需要定义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(); });，因此请将其切换为：

{{1}}

mongoose嵌入式docs主要细节回调序列

1 个答案: