Using a boolean attribute as a conditional on an update action on a model in Rails 3 -

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imagine have boolean , string attribute on model data this:

model.locked => true model.status => "available"

when update action invoked, want use boolean attribute control whether string attribute gets modified update, other attributes in update should saved regardless.

so if

model.locked => true

and try

model.status = "sold"

then

model.status => "available"

currently have model this... 

before_update :dont_update_locked_item, :if => :item_locked?  def item_locked?   self.locked end  def dont_update_locked_item   #some rails magic goes here end

how prevent single attribute being updated?

i know answer going hurt, me out. it's late, i'm tired , i'm fresh out of talent. ;-)

hope doesn't hurt :)

class item < activerecord::base   validate :cannot_update_if_locked, :on => :update    def item_locked?     self.locked   end    def cannot_update_if_locked     errors.add(:item_id, "is locked") if item_locked?   end end

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