Adding a “Like/Unlike” button to a post in Rails

Question

The site is a simple community where each user creates posts and users may \"like\" them or \"unlike\" them.

I have a Post and a Like model. Currently, I\'m listing all

Answer 1

You should define association in user model

if it's ror 2.* add method in User model. it should look like this:

has_many :likes
def already_likes?(post)
  self.likes.find(:all, :conditions => ['post_id = ?', post.id]).size > 0
end

Assuming Like has fields user_id and post_id and of course in view

if current_user.already_likes?(@post)
  #add unlike button
end