decko-commons/decko

def card
  self
end

event :reject_empty_subcards, :prepare_to_validate do
  subcards.each_with_key do |subcard, key|
    next unless subcard.new? && subcard.unfilled? && !trigger.present?

    drop_subcard(key)
    director.subdirectors.delete(subcard)
  end
end

# check when deleting field that left has not also been deleted
def trashed_left?
  l = left
  !l || l.trash
end

# check when renaming field that it is not actually the same field
# (eg on a renamed trunk)
def same_field?
  (left_id == left_id_before_act) && (right_id == right_id_before_act)
end