如何用其他字段在猫鼬中填充子文档？

Question

var schema = new mongoose.Schema({ 
name: { type: String, require: true }, 
comments: [{ 
    id: {type: Schema.Types.ObjectId, ref: 'Comment'}, 
    vote: Number, 
}], 
creator: {type: Schema.Types.ObjectId, ref: 'User'}, 

我可以填充creator，但不能填充comment

Posts 
.findOne({ id: id }) 
.populate('creator') 
.populate('comments') 
.exec(function (err, post) { 
}); 

Answer 1

请尝试这一个，与comments.id如下

Posts 
    .findOne({ id: id }) 
    .populate('creator') 
    .populate('comments.id') 
    .exec(function (err, post) { 
    });