CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3ruby-on-rails-3.2
pratski
pratski

Reputation: 1488

How to scope results from 2 different models?

I have a User model that has_one profile. I have the following code in my User model:

class User < ActiveRecord::Base
 scope :city, lambda { |user| joins(:profile).where(:profiles => {:city => user.profile.city})}
end

Then in my index action of the Users controller:

  def index
   @users = User.city(current_user).paginate :page => params[:page], :per_page => 20
  end

This allows me to fetch all users from the same city as the current_user. What I'd also like to do is to fetch only those users that have a profile picture uploaded. I am using paperclip and the image columns are in the Users table. I wanted to add something like show users where image_file_name != nil. However the scope above includes the profiles tables. How can I merge the query to include a column from the Users table and one from the profiles table?

Upvotes: 0

Views: 147

Answers (1)

Veraticus
Veraticus

Reputation: 16084

You can join scopes together in Rails to form a final query.

class User < ActiveRecord::Base
  scope :city, lambda { |user| joins(:profile).where(:profiles => {:city => user.profile.city})}
  scope :with_pictures, where('users.image_file_name IS NOT NULL')
end

Assuming that's what your database uses to find not-null columns.

And then in your controller:

def index
  @users = User.city(current_user).with_pictures.paginate :page => params[:page], :per_page => 20
end

Upvotes: 3

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