// virtual pupulate
AuthorSchema.virtual('posts', {
ref: 'BlogPost',
localField: '_id',
foreignField: 'author'
})
// add this in your schema if vritual is not work, this method working for me
AuthorSchema.set('toObject', { virtuals: true })
AuthorSchema.set('toJSON', { virtuals: true })const storySchema = Schema({
authors: [{ type: Schema.Types.ObjectId, ref: 'Person' }],
title: String
});
// Later
const story = await Story.findOne({ title: 'Casino Royale' }).populate('authors');
story.authors; // `[]`// Specifying a virtual with a `ref` property is how you enable virtual
// population
AuthorSchema.virtual('posts', {
ref: 'BlogPost',
localField: '_id',
foreignField: 'author'
});
const Author = mongoose.model('Author', AuthorSchema, 'Author');
const BlogPost = mongoose.model('BlogPost', BlogPostSchema, 'BlogPost');var mongoose = require('mongoose')
, Schema = mongoose.Schema
var eventSchema = Schema({
title : String,
location : String,
startDate : Date,
endDate : Date
});
var personSchema = Schema({
firstname: String,
lastname: String,
email: String,
gender: {type: String, enum: ["Male", "Female"]}
dob: Date,
city: String,
interests: [interestsSchema],
eventsAttended: [{ type: Schema.Types.ObjectId, ref: 'Event' }]
});
var Event = mongoose.model('Event', eventSchema);
var Person = mongoose.model('Person', personSchema);