Greetings!
I'm trying to set up a validation to ensure that a record is unique across
three columns; col_one, col_two, col_three.
tried this:
validates_uniqueness_of :col_one, :scope=>[:col_two, :col_three]
and it really doesn't work at all like I had hoped.
the docs says this should work
class TeacherSchedule < ActiveRecord::Base
validates_uniqueness_of :teacher_id, :scope => [:semester_id, :class_id]
end
Just want to know if there are any experiences out there to share
before I write my own validation code.
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