Rails - Apr 2013 - validates uniqueness scope allow_blank/allow_nil -> validation error

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.

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think it should be:
 validates :game_id, uniqueness: {scope: :genre_id, allow_blank: true}

среда, 3 апреля 2013 г., 13:56:48 UTC+4 пользователь Lephyrius
написал:
>
> 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. 
>
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