Session unrecognized in before_filter block

rubyonrails-talk
1

As the title suggests, Rails doesn't seem to recognize that a session is a special hash extended off of ActionController::Base. The error tells me either session is unrecognized or session is an array that doesn't accept symbols as a parameter.

I use before_filter and session as following: I have several user controllers extending off of each other, like this: AdminController < ModeraterController, ModeraterController < MemberController, MemberController < ApplicationController.

In each controller, I either have a before_filter block saying something like: before_filter do |controller|   unless session[:member_id]     redirect_to :controller=>'login'   end   if controller.action_name=='edit_profile'     unless params[:id]==session[:member_id]       flash[:notice]="You can't edit someone else's profile"       #some redirect command     end   end end

I also tried the class method (with the self.filter(controller) method), but with no avail, so I was wondering: 1) are you allowed to have more than one method of before_filter in one controller? For example, is this valid?: TempController < ApplicationController before_filter :filter1, :only=>'method1' before_filter :filter2, :except=>'method1' #bunch of methods end

2) why isn't session recognized in the before_filter block method? 3) I'm guessing the reason why the class method isn't working is because I didn't extend it off of ApplicationController (though it is classes floating in a Controller). If this is so, can I do something like?: TempController < ApplicationController before_filter :self #bunch of methods   self.filter(controller)   #whatever   end end

Thanks for the help!

2

I also tried the class method (with the self.filter(controller) method), but with no avail, so I was wondering: 1) are you allowed to have more than one method of before_filter in one controller? For example, is this valid?: TempController < ApplicationController before_filter :filter1, :only=>'method1' before_filter :filter2, :except=>'method1' #bunch of methods end

Yup.

2) why isn't session recognized in the before_filter block method?

It's using the controller's class as the local binding since a controller instance isn't available at the time of the block's creation. That's why the controller instance is passed. Therefore, all controller methods need to be called from the controller instance, not self.

3) I'm guessing the reason why the class method isn't working is because I didn't extend it off of ApplicationController (though it is classes floating in a Controller). If this is so, can I do something like?: TempController < ApplicationController before_filter :self #bunch of methods   self.filter(controller)   #whatever   end end

Yes, but you don't need to pass the controller. I find this makes the filter more self-describing.

before_filter :check_member_access

protected   def check_member_access     ...   end

The nice thing is you also have access to the private/protected methods of the controller.

3

Huh, I should have tested this out earlier: it would have saved me a lot of time:). Thanks for your help!