一尘不染

在Mongoose中引用另一个模式

javascript

如果我有两个模式,如:

var userSchema = new Schema({
    twittername: String,
    twitterID: Number,
    displayName: String,
    profilePic: String,
});

var  User = mongoose.model('User')

var postSchema = new Schema({
    name: String,
    postedBy: User,  //User Model Type
    dateCreated: Date,
    comments: [{body:"string", by: mongoose.Schema.Types.ObjectId}],
});

我试图像上面的示例一样将它们连接在一起,但是我不知道该怎么做。最终,如果我可以做这样的事情,那将使我的生活变得很轻松

var profilePic = Post.postedBy.profilePic

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2020-05-01

共1个答案

一尘不染

听起来好像populate方法是您想要的。首先,对您的发布架构进行少量更改:

var postSchema = new Schema({
    name: String,
    postedBy: {type: mongoose.Schema.Types.ObjectId, ref: 'User'},
    dateCreated: Date,
    comments: [{body:"string", by: mongoose.Schema.Types.ObjectId}],
});

然后建立您的模型:

var Post = mongoose.model('Post', postSchema);

然后,当您进行查询时,可以像这样填充引用:

Post.findOne({_id: 123})
.populate('postedBy')
.exec(function(err, post) {
    // do stuff with post
});
2020-05-01