cancan issue

true for false collection.rb

class Ability
  include CanCan::Ability

  def initialize(user)
    if user.role?('admin') 
     can :manage, :all
    end

    if user.role?('user_manager')
      can :manage, User
    end

    if user.role?('agent')
      can :create, Policy
      can :update, Policy, :policies_users => {user_id: user.id, contract: Contract.find_by_name("Agent") }
      can :manage, Calculation, user_id: user.id
    end
end

#and in my view:

- Policy.joins(:policies_users).where("policies_users.user_id != #{current_user.id} and contract_id = #{Contract.find_by_name('Agent').id}").each  do |p|
  = can? :update, p
  %br
= can? :update, Policy, Policy.joins(:policies_users).where("policies_users.user_id != #{current_user.id} and contract_id = #{Contract.find_by_name('Agent').id}").all