Mongoose/MongoDB中嵌套模式的正确模式是什么? [英] What is the proper pattern for nested schemas in Mongoose/MongoDB?

问题描述

执行以下操作对我来说似乎合乎逻辑:

It seems logical to me to do something like the following:

var AvatarSchema = new Mongoose.Schema({
    type: String,
    url: String
});

var UserSchema = new Mongoose.Schema({
    avatars: [AvatarSchema],
    email: String,
    name: String,
    salt: String,
    token: String
});

var ThinUserSchema = new Mongoose.Schema({
    avatars: [AvatarSchema],
    email: String,
    firstname: String,
    lastname: String,
});

var QuestionSchema = new Mongoose.Schema({
    question: String,
    users: [ThinUserSchema]
});

然后再说. . .执行以下操作:

Then later on. . .do something like the following:

var question = new Question({
    question: 'Wut?',
    users: users //where users is an array of instances of a user model of the UserSchema
});

在这里，我希望问题的用户部分填充有头像，电子邮件，名字和姓氏. . .但是，由于用户/头像已经具有_id，因此这些名称不会保留.

Here I would expect the users section of the question to be populated with avatars, emails, firstnames and lastnames. . .however since the users/avatars already have _id, these are not persisted.

• 从用户/头像中删除每个_id似乎很愚蠢.
• 显式设置每个用户/头像似乎效率低下.
• 切换到混合类型，将所有内容放入其中，并且需要markModified.

这些模式的正确模式是什么?

What is the proper pattern for these sorts of schemas?

谢谢！

推荐答案

我相信您的假设是正确的，在Mongoose中称为嵌入式文档，这是Mongoose文档中的示例.

I believe you are correct in your assumptions, it's called Embedded documents in Mongoose, here is the example from the Mongoose documentation.

var Comments = new Schema({
    title     : String
  , body      : String
  , date      : Date
});

var BlogPost = new Schema({
    author    : ObjectId
  , title     : String
  , body      : String
  , date      : Date
  , comments  : [Comments]
  , meta      : {
        votes : Number
      , favs  : Number
    }
});

mongoose.model('BlogPost', BlogPost);

免责声明:我不一定要在项目前加逗号！

Disclaimer: I wouldn't necessarily put the comma before the items!

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