Question

I’ve looked trough the already asked questions but couldn’t find an answer.

I’ve some models:

Each User can cast many Votes, each Vote is linked to one Post, each Post can be linked to many Users. Each User can cast only one vote per post.

class User < ActiveRecord::Base
  has_many :posts, :through => :user_posts
  has_many :user_posts
end

class Vote < ActiveRecord::Base
  belongs_to :user
  belongs_to :post 
end

class Post < ActiveRecord::Base
  has_many :users, :through => :user_posts
  has_many :user_posts, :dependent => :destroy
  has_many :votes, :dependent => :destroy
end

class UserPost < ActiveRecord::Base
  belongs_to :user
  belongs_to :post  
end

What I’m trying to accomplish is to count how many times “User A” has voted for posts that belongs to “User B” in the last day.

I can do this with a full SQL query but I’d like to know if there is an easied “Rails-friendly way” to perform this.

Thanks!

Augusto

Answer 1

Something like this should work

user_a.votes.count(:conditions => { :post => { :users => user_b }, :date => Date.today }, :joins => { :post => :users })