hata-mongoose-deep-populate

Mongoose plugin to enable population of nested models at any level of depth. Support Mongoose 3.8.x and later. Refer to changelog for breaking changes. (https://www.npmjs.com/package/mongoose-deep-populate)

Usage

Sample usages are based on the following schemas:

var UserSchema = new Schema({})
 
var CommentSchema = new Schema({
  user  : {type: Number, ref: 'User'}
})
 
var PostSchema = new Schema({
  user    : {type: Number, ref: 'User'},
  comments: [{type: Number, ref: 'Comment'}],
  likes   : [{user: {type: Number, ref: 'User'}}],
  approved: {status: Boolean, user: {type: Number, ref: 'User'}}
})

Register plugin

// CHANGE from 1.x: need to pass in mongoose instance
var deepPopulate = require('hata-mongoose-deep-populate')(mongoose);
PostSchema.plugin(deepPopulate, options /* more on options below */);

Perform population

On Post model:

 
// Use callback
Post.deepPopulate(posts, [{path: 'comments.user', model: [Comment.getModel(id), Usere.getModel(id)]}], function (err, _posts) {
  // _posts is the same instance as posts and provided for convenience
  posts.forEach(function (post) {
    // post.comments and post.comments.user are fully populated
  });
});
 
// Use promise
Post.deepPopulate(posts, [{path: 'comments.user', model: [Comment.getModel(id), User.getModel(id)]}]).then(...);

On an instance of Post:

// Use callback
post.deepPopulate([{path: 'comments.user', model: [Comment.getModel(id), User.getModel(id)]}], function (err, _post) {
  // _post is the same instance as post and provided for convenience
});
 
 
// Use promise
post.deepPopulate([{path: 'comments.user', model: [Comment.getModel(id), User.getModel(id)]}]).then(...);

On Query (returns the same query object to chain):

Post.find().deepPopulate([{path: 'comments.user', model: [Comment.getModel(id), User.getModel(id)]}]).exec(function (err, posts) { ... });
Post.findOne().deepPopulate([{path: 'comments.user', model: [Comment.getModel(id), User.getModel(id)]}]).exec(function (err, post) { ... });
Post.findById(id).deepPopulate([{path: 'comments.user', model: [Comment.getModel(id), User.getModel(id)]}]).exec(function (err, post) { ... });

Populate multiple paths

post.deepPopulate([{path: 'user', model: [User.getModel(id)]}, {path: 'comments.user', model: [Comment.getModel(id), User.getModel(id)]}, {path: 'likes.user', model: [null, User.getModel(id)]}, {path: 'approved.user', model: [null, User.getModel(id)]}], cb);

Test

The test suite will drop the database each run, so only run it against a test database. To run tests, execute this command where --db is the connection string.

gulp test --db mongodb://127.0.0.1/mongoose_deep_populate_test_db

Changelog

v0.0.1

• Initial release

License

MIT