CODEWITHSUNDEEP
ruby-on-railsrubycancan
Nando
Nando

Reputation: 747

CanCan user parameter always nil only ajax request

i'm using Cancan + Devise in my rails app:

the problem happens when i try to update Comment record, i guess the user parameter of initialize method always is coming nil even i'm logged:

Ability.rb

class Ability
  include CanCan::Ability


  def initialize(user)
    user ||= User.new # guest user

    unless user.nil?
      if user.role.name == "admin"
        can :manage, :all
      elsif user.role.name == "atendimento"
        can :manage, Comment
      end
    end
  end
end

Better_errors Better Errors

finally it raises this error.

enter image description here

everyone is facing this issue? anyone can help me?

Rails 3.2.8 Devise 2.1.0 CanCan 1.6.9 Ruby 1.9.3p385

Edit 1

CommentsController.rb

 class CommentsController < ApplicationController

   authorize_resource :only => [:index, :show,:new,:edit, :create,:update,:destroy,  :approve, :moderate, :disapprove]

   layout "admin"

Edit 2

Hey guys, CanCan works fine excerpt when controller receive ajax request..

Comments.js

 var request = $.ajax({
   url: url_to_request,
   type: "PUT",
   data: {id : id_to_send, answer : answer_to_send, question : question_to_send },
   dataType: "json"
 });

config/routes.rb

  resources :comments do
    member do
      put 'approve'
      put 'moderate'
      put 'disapprove'
    end
  end

Upvotes: 0

Views: 876

Answers (1)

user1454117
user1454117

Reputation:

It's not user that is nil, it is user.role.

You can use user.role.try(:name) or ensure the role method always returns an object that responds to name.

Edit

Cancan uses the current_user method on the controller. If that method returns nil, then user will be nil in your Ability file.

Make sure the Devise before_filter runs before your Cancan before filters (like a call to load_and_authorize_resource). If your user hasn't authenticated before Cancan starts trying to authorize, your user will be nil.

Upvotes: 5

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