cancan rails code understanding

Question

I am unable to debug some of cancancan code and looking for some help.

can :update, Message do |m|
  false
end

But strangely cancancan always return true and i am unable to debug the issue.Here is a small piece of relevant cancancan code

   rule.rb
    def matches_conditions?(action, subject, extra_args)
         if  
           ...
          elsif @block && !subject_class?(subject)
            @block.call(subject, *extra_args)
          end
        end

I can see that the @block.call is made and it return false but this piece of code in the ability.rb does not make sense to me

match = subject.map do |subject|
        relevant_rules_for_match(action, subject).detect do |rule|
          rule.matches_conditions?(action, subject, extra_args)
        end
      end.compact.first

      match ? match.base_behavior : false

The base_behaviour is never set after initialization, and set to true at initialization, how would base_behaviour of a rule would ever return false.

The helper function is called

ability = Ability.new(user)
ability.can? :update ,@message

Are you checking `can?(:update, Message)` or `can?(:update, @message)` in your view? — kddeisz, Feb 03 '16 at 13:48
You have to restart your server, each time you make changes to your `ability.rb`. Also can you paste the code, where you are using `can?` helper method. — Hassan Akram, Feb 03 '16 at 14:02

score 0 · Answer 1 · answered Feb 04 '16 at 02:23

0

Got it there was a overriding ability

answered Feb 04 '16 at 02:23

sethi

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cancan rails code understanding

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