猫鼬不保存嵌套对象

问题描述

我对猫鼬为什么不保存我的对象感到困惑:

I'm puzzled as of why Mongoose isn't saving my object:

var objectToSave = new ModelToSave({
  _id : req.params.id,
  Item : customObject.Item //doesn't save with customObject.getItem() neither
});

但是正在保存；如下所示或带有硬编码的值:

But is saving this; as is below or with hardcoded values:

var objectToSave = new ModelToSave({
  _id : req.params.id,
  Item : {
    SubItem : {
      property1 : customObject.Item.SubItem.property1, //also saves with customObject.getItem().SubItem.getProperty1()
      property2 : customObject.Item.SubItem.property2
    }
  }
});

getters/setter是

The getters/setters are

MyClass.prototype.getItem = function(){ ... };

我的Item对象很大，我宁愿不必指定每个子属性...

My Item object is quite big, and I'd rather not have to specify every single sub properties...

当我使用console.log(customObject.Item)查看Item对象时，或者当我通过API将其作为JSON返回时，它都具有我期望的所有嵌套属性(SubItem，...).

When I view my Item object with console.log(customObject.Item) or when I return it through my API as JSON, it has all the nested properties (SubItem, ...) that I'm expecting.

项目定义为:

SubItem = require('SubItemClass.js');

function MyClass(){
  this.Item = {
    SubItem : new SubItem()
  }
}

并将SubItem定义为

And SubItem is defined as

function SubItem(){
  this.property1 = '';
  this.property2 = 0;
}

该模型似乎可以正常工作，因为如果我对数据进行硬编码或指定要保存到模型的每个属性，则可以将数据保存到模型中.

The model seems to work as expected, because If I hardcode data or if I specify every single properties to save to the model, I can save the data to the Model...

反正这是代码:

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var subItemDefinition = {
  Property1 : {type:String},
  Property2 : {type:Number},
};

var itemDefinition = {
  SubItem : subItemDefinition
};

var customDefinition = {
  Item : itemDefinition
};

var customSchema = new Schema(customDefinition);
module.exports = mongoose.model('ModelToSave', customSchema);

感谢您的帮助

推荐答案

我遇到了这种令人沮丧的情况，对Mongoose网站上记录的解决方案感到有些惊讶.

I came across this frustrating situation and was a little surprised by the documented solution from Mongoose's website.

所以这意味着要保存嵌套的数组/对象属性(在您的情况下为Item)，则需要明确地指定更改.markModified('Item')

so what this means is to save nested array/object properties (Item in your case), you need to be explicit in specifying the change .markModified('Item')

var objectToSave = new ModelToSave({
  _id : req.params.id,
  Item : customObject
});
objectToSave.markModified('Item');
objectToSave.save();

- http://mongoosejs.com/docs/schematypes.html#mixed

这篇关于猫鼬不保存嵌套对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！