has_comments

Instalation

Install the plugin with script/plugin install git://github.com/fnando/has_comments.git
Generate a migration with script/generate migration create_comments and add the following code:

class CreateComments < ActiveRecord::Migration def self.up create_table :comments do |t| t.text :comment t.references :commentable, :polymorphic => true t.references :user t.timestamps end
```
 add_index :comments, :commentable_type
 add_index :comments, :commentable_id
 add_index :comments, :user_id
```
end

def self.down drop_table :comments end end
Run the migrations with rake db:migrate

Add the method call has_comments to your model.

class Photo < ActiveRecord::Base has_comments end
Add this association on your User model:

class User < ActiveRecord::Base has_many :comments, :dependent => :destroy end

photo = Photo.find(:first) user = User.find(:first)

photo.comment(:user => user, :comment => 'Wow! Nice shot!') # => photo.comments # => [] photo.find_users_that_commented # => [] photo.find_comments_by_user(user) # => []

NOTE: You should have a User model. You should also have a comments_count column on your model. Otherwise, this won't work!