node.js - Mongoose: Vritual getter of populated document

Question

I have 2 schemas and schema2 is populating field from schema1 which has a virtual getter. But that virtual getter is not appearing when I populate from schema2.

example code:

schema1 = new Schema({
  comments: [{ type: Array }],
})

schema1.virtual('comment_count').get(function() {
    return this.comments.length
})

schema2 = new Schema({
  post: { type: String },
  people: { type: Schema.Types.ObjectId, ref: 'schema1' }
})  

assuming schema2's model is schema2model

schema2model.find({}).populate('people')

here i do get comments property but I'm not getting comment_count field

question from:https://stackoverflow.com/questions/65860663/mongoose-vritual-getter-of-populated-document

Answer 1

• There are few ways to access virtual properties, try anything:

1. Access manually

var docs = schema2model.find({}).populate('people');
console.log(docs[0].people.comment_count);

2. Access using toObject method

var docs = schema2model.find({}).populate('people');
docs = docs.toObject({ virtuals: true });
console.log(docs);

3. set toObject: { virtuals: true } property in your schema

let schema1 = new Schema({
  comments: [{ type: Array }]
}, { toObject: { virtuals: true } });

• call your query after updating your schema

var docs = schema2model.find({}).populate('people');
console.log(docs);