Export all user policies using Pundit gem

Question

How do I can retrieve all user policies and scopes using Pundit Gem? I need to return a json object with all user policies to check permissions in Frontend javascript templates.

Using CanCanCan gem, I can do something like this:

class Ability
  include CanCan::Ability

  # ....

  def to_list
    rules.map do |rule|
      object = { actions: rule.actions, subject: rule.subjects.map{ |s| s.is_a?(Symbol) ? s : s.name } }
      object[:conditions] = rule.conditions unless rule.conditions.blank?
      object[:inverted] = true unless rule.base_behavior
      object
    end
  end
end

Is possible to do the same with Pundit?

score 6 · Accepted Answer · answered Sep 12 '18 at 09:51

I have the same requirement, I got the following code working per investigation:

def index
    classes = [Admin, BusNumber, Ticket, :ticket_statistics]     

    permissions = { }                             

    classes.each do |clazz|                       
        policy =  Pundit.policy(current_admin, clazz)      
        policy.public_methods(false).sort.each do |m|      
            result = policy.send m                    
            permissions["#{clazz}.#{m}"] = result     
        end
    end 

    render json: permissions
end

the current_admin is the method to get the current login user, the code gives the following result

{
    "Admin.create?": true,
    "Admin.disable?": true,
    "Admin.enable?": true,
    "Admin.index?": true,
    "Admin.show?": true,
    "Admin.update?": true,
    "BusNumber.create?": true,
    "BusNumber.destroy?": true,
    "BusNumber.index?": true,
    "BusNumber.update?": true,
    "Ticket.index?": true,
    "Ticket.refund_by_admin?": true,
    "Ticket.show?": true,
    "ticket_statistics.overall?": true
}

will this work work namespaced models like `Foo::BarPolicy`? — reiallenramos, Mar 16 '20 at 02:41
@reiallenramos you can do this for namespaced policies: `Pundit.policy(current_admin, [:foo, Bar]) # ==> Looks in Foo::BarPolicy` — CarlsBad505, Jul 22 '20 at 18:00

Export all user policies using Pundit gem

1 Answers1