I'm working on a method but the results are "the opposite" of what I want to happen. Here's what I have in my model:
after_update :foo
def foo self.scores.where(:standard_id => self.standard_ids).each do | score> score.destroy end end
... which actually deletes the scores I want to keep. What I want to do is something like:
self.scores - self.scores.where(:standard_id => self.standard_ids).each do...
OR
a = self.scores b = self.scores.where(:standard_id => self.standard_ids) a - b = c c.each do...
OR
self.scores.reject(self.scores.where(:standard_id => self.standard_ids)).each do...
Any help is greatly appreciated! Thanks in advance 
