如何使用mongoose定义外键？

Question

如何在nodeJS中使用mongoose定义外键？

以下是我尝试制作的架构示例，其中id_def需要引用def表的主键id

var abcSchema = mongoose.Schema({
    name: String,
    id_def: Number // foreign key
});

提前致谢！

Answer 1

试试这个：

var abcSchema = mongoose.Schema({
    name: String,
    _def: { type: mongoose.Schema.Types.ObjectId, ref: 'def' }
});

Answer 2

var abcSchema = mongoose.Schema({
    name: String,
    desc: {
        type: mongoose.Schema.Types.ObjectId, 
        ref: 'desc'
    }
});