是否可以在铁路模型中使用有条件的声明?
我这样想:
if create
before_save do
self.position = self.track.position
end
else
acts_as_list :scope => :product_id
end
我基本上想到,在最初创立后,行为——作为清单——才会有效。
It looks like you re looking for before_create.
class Model < ActiveRecord::Base
acts_as_list :scope => :product_id
before_create :set_initial_position
private
def set_initial_position
self.position = self.track.position
end
end
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