Sails.js populate with where

Question

I need to select users with dogs (pets with type equal \'dog\')

var User = Waterline.Collection.extend({

  identity: \'user\',

  attributes: {         


        

Answer 1

What you are looking for hasn't been implemented in waterline (Sails ORM) yet, check issue #266 for more details.

User.find().populate('pets', {type: 'dog'}).exec(err, users) ...

This will return all users (User.find()) and only populate pets of type dog (populate('pets', {type: 'dog'})). So you'll have users without dogs in your results.

User.find().where({'pets.type': 'dog'}).populate('pets').exec(err, users) ...

Waterline does not support dot (.) notation. Sails-mongo does have some support for it due to MongoDB support.

Finally, if you are using one of the SQL adapters you may work around this by doing a raw sql query using .query() (docs).

Answer 2

If you don't need to query users and just need the query for dogs. You could just as easily reverse the query.

Pet.find({type: 'dog'}).populate('users').exec(err, petsWithUsers)

Answer 3

Did you try this?

User.find().populate('pets', {
  where: {
    type: 'dog'
  }
}).exec(err, users)...