Add note about `console.log()` with populated virtuals to docs

Do you want to request a feature or report a bug? bug

What is the current behavior? Case 1: It does not return the populate field if i populate just after the save

const x = await y.populate('poster').execPopulate();
 console.log(x)

Case2: If i add {toObject: {virtuals: true}, toJSON: {virtuals: true}} this in product Schema i get this output

{
  _id: 6152b575fdd5743bc8fb3bed,
  product_name: 'Biscuit',
  owner: 2,
  __v: 0,
  id: '6152b575fdd5743bc8fb3bed'
}

Case 3: with find().populate(‘poster’) it will return the expected result.

If the current behavior is a bug, please provide the steps to reproduce.

const mongoose = require('mongoose');

let UserSchema = new mongoose.Schema({
    name : {
        type: String,
        required: [true, 'Name is required']
    },
    myId: {
        type: Number,
        required: [true, 'myId is required']
    }
});

let ProductSchema = new mongoose.Schema({
    owner: {type: mongoose.Schema.Types.Number, ref: 'user'},
    product_name: {type:String, required: true}
})


/* {toObject: {virtuals: true}, toJSON: {virtuals: true}} */
  

run().catch((err) => console.log(err));

async function run() {
    await mongoose.connect('mongodb://localhost:27017/test', {
        useNewUrlParser: true,
        useUnifiedTopology: true,
    });
    await mongoose.connection.dropDatabase();
 
    const UserModel = mongoose.model('user', UserSchema);
    const ProductModel = mongoose.model('product', ProductSchema);

    ProductSchema.virtual('poster', {
        ref: 'user',
        localField: 'owner',
        foreignField: 'myId',
      }); 

    const userRes = new UserModel({ name: 'Alexa', myId: 2});
    await userRes.save();
    const productRes = new ProductModel({product_name: 'Biscuit', owner: 2});
    const y = await productRes.save()
    const x = await y.populate('poster').execPopulate();
    console.log(x)
    /* 
     with find populate it will work
    */
    // const findPopulateRes = await ProductModel.find().populate('poster');
    // console.log(findPopulateRes)
}

What is the expected behavior?

What are the versions of Node.js, Mongoose and MongoDB you are using? Note that “latest” is not a version. node - v14.17.1 mongodb - 4.2 mongoose - 5.9.22

[vkarpov15]

@indraraj26 I took a closer look and this is expected behavior because you’re adding ProductSchema.virtual('poster') after creating your product model with mongoose.model('Product', ProductSchema).

From the model docs:

The .model() function makes a copy of schema. Make sure that you’ve added everything you want to schema, including hooks, before calling .model()!

[indraraj26]

Hi @vkarpov15,

even with virtual: true on schema doesn’t work as you can see, i have attached the output in main thread.

Could you please try it once with my script.

Thank you