How to organize relationships in Mongoose?

Question

MongoDB

Here I have two models:

var PostSchema = new Schema({
  title: String,
  image: {
           type: Schema.Types.ObjectId,
           ref: 'Image'
        },
  content: String
});

var ImageSchema = new Schema({
  url: String
});

is it possible not to specify the required ObjectId, let's say I want the post to be without a picture and in the response I want to receive something like this JSON:

{
   "post":{
      _id: // id,
      title: //заголовок,
      image: null,
      content://контент
   }
}

Answer 1

Can.

var PostSchema = new Schema({
  title: String,
  image: {
           type: Schema.Types.ObjectId,
           ref: 'Image',
           default: null
        },
  content: String
});