I'm programming a model for a blog with authors and posts. I was following this doc: Mongoose Query Population

My concern is that the createPost function is inefficient. Another option is to nest the posts in the Author, but how I will get all posts? Should I use MySQL? Am I doing it right? (Take a look at the functions as well)

Some more details:


let mongoose = require("mongoose");
let Schema = mongoose.Schema;

let PostSchema = Schema({
    title: {type: String},
    body: {type: String},
    date: {type: Date},
    tags:[{type: String}],
    _author: {type: Schema.Types.ObjectId, ref: 'author'}

let AuthorSchema = Schema({
    name: {type: String},
    photo: {type: String},
    bio: {type: String},
    username: {type: String, index: true},
    posts:[{type: Schema.Types.ObjectId, ref: 'post'}],
    password: {type: String}

let Author = mongoose.model('author', AuthorSchema);
let Post = mongoose.model('post', PostSchema);

module.exports = Author;
module.exports = Post;

module.exports.createAuthor = (newAuthor, callback)=>{

module.exports.createPost = (username, newPost, callback)=>{
            newPost._author = author._id
            newPost.save().then(err, auth)=>{
            throw err;

module.exports.getAuthorByPostTitle = (postTitle, callback)=>{
        Post.findOne({title:postTitle}).populate('_author').exec((err, post)=>{
                throw err;
                return post._author;

module.exports.getPostsByAuthorId = (authorId, callback)=>{
        Post.find({_author:authorId}).exec((err, posts)=>{
                throw err;
                return posts;

1 Answer 1


You can use the forEach function like this

const allPosts = [];

Author.find({}, function(err, users) {
    if (err) throw err;

    users.forEach(function(user) {
        const a = user.posts;
        a.forEach(us => allPosts.push(us));

Now the allPosts array will have all the posts.

  • \$\begingroup\$ It would have been better to edit your first answer, rather than posting a new. You can see the [edit] and [delete] links below the text of your posts. \$\endgroup\$
    – janos
    Jan 3, 2018 at 12:06
  • \$\begingroup\$ Ok, that would solve the problem of querying all posts \$\endgroup\$ Jan 3, 2018 at 23:36
  • \$\begingroup\$ What do you think about the createPost function? \$\endgroup\$ Jan 3, 2018 at 23:36

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