猫鼬:在父级中没有引用的情况下填充 [英] Mongoose: Populating without ref in parent

问题描述

在我的node.js +猫鼬应用程序中，我有一个父级和一个子级架构，它们彼此具有引用:

In my node.js + mongoose application I have a parent and a child schema which have the refs of each other:

var PersonSchema = new Schema({
    name    : String
  , age     : Number
  , stories : [{ type: Schema.ObjectId, ref: 'Story' }]
});

var StorySchema = new Schema({
    _creator : { type: Schema.ObjectId, ref: 'Person' }
  , title    : String
  , fans     : [{ type: Schema.ObjectId, ref: 'Person' }]
});

现在，我可以通过以下方式填充所有故事:

Now I am able to populate all stories when fetching a person by:

Person.findOne({ name: "some name"}).populate('stories').exec(...);

最近，我意识到面对面不断增长的故事(例如故事)会降低巨大数组的性能.所以我想改变一下，因为在我的情况下，阵列的增长非常快并且变得庞大.我的解决方案似乎很简单.我将人员模式更改为

Recently I recognized that a growing array like stories in person slows down the performance for huge arrays. So I want to change that, because in my case the array is growing really fast and gets huge. My solution appeared to be easy. I changed the person schema to

var PersonSchema = new Schema({
    name    : String
  , age     : Number
});

只有StorySchema保留引用.

that only the StorySchema holds the ref.

现在的问题:即使是我个人的故事，也有办法或解决方法吗?

Now the question: Is there a way or workaround to populate even so the stories in my person?

推荐答案

您可以随时这样做:

var Script = mongoose.model('Script');  
Person.findOne({ name: "some name" }, function(err, person) {
    Script.find({ _creator: person._id }, function(err, scripts) {
        person.scripts = scripts;
        ...
    })
})

希望有帮助.

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