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How to use unscoped on associated relations in Rails3?

Asked 2011-01-21T11:16:13.697
76

I have a default scope on products due to information security constraints.

class Product < ActiveRecord::Base
  has_many :photos

  default_scope where('visible = 1')
end

In my associated Photo model, however, I also have to find products that should not be visible.

class Photo < ActiveRecord::Base
  belongs_to :product
end

my_photo.product

In other cases, I can use unscoped in order to bypass the default_scope, e.g. in Product.unscoped.find_by_title('abc'). However:

How to remove the scope when using associations of a record?

my_photo.unscoped.product does not make sense as my_photo does not have a method called unscoped. Neither does my_photo.product.unscoped make sense as my_photo.product may already be nil.

ruby-on-rails ruby-on-rails-3 scope arel
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61

Another option is to override the getter method and unscope super:

class Photo < ActiveRecord::Base
  belongs_to :product

  def product
    Product.unscoped{ super }
  end
end

I ran into the same situation where I had one associated model that needed to be unscoped, but in almost every other case it needed the default scope. This should save you the extra calls to unscoped if you are using the assocation getter in more than one place.

answered 2012-06-13T15:43:24.307

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