How to define a foreign key using mongoose?

Question

How to define a foreign key using mongoose in nodeJS?

Here is an example of schema that I'm trying to make, where id_def needs to refer to the primary key of def table which is id

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

Thanks in advance!

Answer 1

Try this:

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