How can I send a parameter to a before filter?

Question

I\'d like to create a before_filter method in my application controller like this...

def check_role(role_name)
  unless logged_in_user.has_role? role_name
    fl         


        

Answer 1

You can use a bit of meta-programming. Something like this (completely untested, just something to give you an idea of how it might go):

Module RoleWithIt
  Role.all.each do |role|
    define_method("check_#{role.name}_role".to_sym) do
      check_role(role.name)
    end
  end

  def check_role(role_name)
    return if logged_in_user.has_role?(role_name)
    flash[:notice] = 'Access to that area requires additional privileges.'
    redirect_to :back
  end
end

ApplicationController.send :include, RoleWithIt

To have it load when your app initialises, just put it in a file called role_with_it.rb and put it in your lib directory.