I have this in a model: class GenreBadge < ActiveRecord::Base belongs_to :game, counter_cache: :genre_badges_count, touch: true belongs_to :genre validates :game_id, uniqueness: {scope: :genre_id}, allow_blank: true
end When I get one existing genre badge genre_badge = game.genre_badges.first genre_badge.game_id = nil genre_badge.save! It creates an validation exception: "ActiveRecord::RecordInvalid: Validation failed: Game has already been taken" I already have have specified that I want to allow_blank. I really don't know why I get the validation error. I also tested allow_nil but got the same error. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.