mongoose嵌入式文档对象是否是mongoose对象？

Question

我有以下代码片段,在项目中有嵌入的注释

var CommentModel = new Schema({
  text: {type: String, required: true},
}, {strict: true})

CommentModel.options.toJSON = { transform: function(doc, ret, options){
  delete ret.__v;
  delete ret._id;
}}

Comment = mongoose.model('Comment', CommentModel);

var ItemModel = new Schema({
  name:        {type: String, required: true},
  comments:    [ Comment ]
}, {strict: true})

Item = mongoose.model('Item', ItemModel);

Item.findOne({}, function (err, item) {
  item.comments.forEach(function(o) {
    console.log(o.toJSON)
  })
})

但是,返回的结果对象数组似乎不是猫鼬对象,或者至少没有应用转换.我错过了什么地方或者这只是猫鼬不支持吗？

Answer 1

你有几个问题:

ItemModel应该引用模式CommentModel,而不是模式Comment中的模型:

var ItemModel = new Schema({
  name:        {type: String, required: true},
  comments:    [ CommentModel ]   // <= Here
}, {strict: true})

你需要调用toJSON你的console.log,而不是作为参数传递函数:

Item.findOne({}, function (err, item) {
  item.comments.forEach(function(o) {
    console.log(o.toJSON())   // <= Here
  })
})