Question

I have two models, Article and Post that both inherit from a base model called ContentBase.

You can leave comments on both Articles and Posts, so I am using a Polymorphic Association between Comments and Article or Post.

However, since both Article and Post inherit from ContentBase, the commentable_type field ends up being ‘ContentBase’ for both and screws everything up.

Is there a way to specify the commentable_type field in the has_many relationship in Article and Post?

Edit:

By ‘screws everything up’ I mean if there is an Article with ID=1 and Post with ID=1 and I add a Comment with commentable_id=1, commentable_type=ContentBase, that comment will show up for both the Article and Post.

Here’s the code:

class Article < BaseContent   has_many :comments, :as => :commentable end  class Post < BaseContent   has_many :comments, :as => :commentable end 

and here’s my Comment model:

class Comment < ActiveRecord::Base   belongs_to :commentable, :polymorphic => true end 

Answer 1

What’s in the ContentBase class? Can you move that code into a module instead of using inheritance?

Module BaseContent    def self.included(base)       base.class_eval do         validates_presence_of     :somefield         validates_length_of       :someotherfield          def my_method           'hello'         end       end    end  end