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Alex Rivera
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I want to create a custom validation function that will not allow a field to be saved empty/nil only if the current field is not empty in the database. How can I access the database value (old value) in the validation function? I can access the new value using self.name_of_field. This is what I have right now validate :image_remote_url_change def image_remote_url_change if self.image_remote_url.blank? and self.image_remote_url_changed? errors.add(:field, "can't be blank once set") return false end end Right now if I try to edit an existing object, it won't accept a new value of empty but when creating a new object it will say "can't be blank once set" even though the old value was never set.
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