Feature request: if_true beside if_attribute and if_permitted_to

[nagyt234]

It would be a nice feature to have if_true in a #has_permission_on block, to check conditions of dynamic parameters that have to be met for the user to meet the privileges in this block. This would be especially useful on new, where no attributes are known yet.

E.g:

 role :login do
    includes :guest

    # -- Document

    has_permission_on [:documents], :to => [:manage, :view] do
      if_attribute :folder_id => is_in { Folder.get_folder_ids_permitted(
        user, [:root, :admin, :update]) }
    end
    has_permission_on [:documents], :to => :view do
      if_attribute :folder_id => is_in { Folder.get_folder_ids_permitted(
        user, :read) }
    end
    has_permission_on [:documents], :to => :new do
      if_true {Folder.has_roles_anywhere?(user, [:root, :admin, :update]) }
    end
  end

[stevehodges]

It seems that this could solve my use case as well. I figure that I already have access to user, and should thusly be able to access a boolean on said user.

My use case is checking a boolean on the actual user:
if_true user.configurable_setting_boolean?

or
if_true user.company.configiruable_setting_boolean?

[sneakernets]

If this can be done, It'd make the ability for me to create a new user through rails much easier.