How to reference multiple models in a mongoose schema referenced path automatically

[samislam]

I have the following schema:

const transactionSchema =  new mongoose.Schema({
   buyer: {
      type: mongoose.Schema.ObjectId,
      ref: '' // 👈 here
   }
})

and I have two models:

• VIPClient.
• NormalClient.

I want the VIPClient and the NormalClient to be referenced in the buyer ref path of the transactionSchema.

How?

Is there something in mongoose such as:

const transactionSchema =  new mongoose.Schema({
   buyer: {
      type: mongoose.Schema.ObjectId,
      ref: 'auto' // 👈 here
      // or for example, ref: (model) => model.name,
   }
})

??

Is there a method to make it automatically understand which model was used to create its doc?

for a reference here, the importance of the ref property is to reference a mongoose model by its name because when you populate this field, it will use the model referenced here. that's why I must add the correct model name, and not any model (💡hint: there are middlewares associated with each model that differs from the others 😉).

[vkarpov15]

const transactionSchema =  new mongoose.Schema({
   buyer: {
      type: mongoose.Schema.ObjectId,
      ref: doc => doc.buyer
   },
   buyer: {
     type: String,
     enum: ['VIPClient', 'NormalClient']
   }
})