CanCan polymorphic resource access problem
- by Call 'naive' True
Hi everybody,
i don't quite understand how to restrict access to links in this particular case with CanCan. I always get "Edit" link displayed.
So i believe the problem is in my incorrect definition of cancan methods(load_ and authorize_).
I have CommentsController like that:
class CommentsController < ApplicationController
before_filter :authenticate_user!
load_resource :instance_name => :commentable
authorize_resource :article
def index
@commentable = find_commentable #loading our generic object
end
......
private
def find_commentable
params.each { |name, value|
if name =~ /(.+)_id$/
return $1.classify.constantize.includes(:comments => :karma).find(value)
end }
end
end
and i have in comments/index.html.erb following code that render file from other controller:
<%= render :file => "#{get_commentable_partial_name(@commentable)}/show.html.erb", :collection => @commentable %>
you can think about "#{get_commentable_partial_name(@commentable)}" like just "articles" in this case.
Content of "articles/show.html.erb":
<% if can? :update, @commentable %>
<%= link_to 'Edit', edit_article_path(@commentable) %> |
<% end %>
my ability.rb:
class Ability
include CanCan::Ability
def initialize(user)
user ||= User.new # guest user
if user.role? :admin
can :manage, :all
elsif user.role? :author
can :read, [Article, Comment, Profile]
can :update, Article, :user_id => user.id
end
end
end
relations with models is:
class Comment < ActiveRecord::Base
belongs_to :commentable, :polymorphic => true, :dependent => :destroy
...
end
class Article < ActiveRecord::Base
has_many :comments, :as => :commentable, :dependent => :destroy
...
end
i have tried debug this issue like that
user = User.first
article = Article.first
ability = Ability.new(user)
ability.can?(:update, article)
and i always get "= true" in ability check
Note: user.role == author and article.user_id != user.id
if you need more information please write
thank's for your time && sorry for my english
