Rails 5 belong_to unscoped

如下两个model

class Product < ActiveRecord::Base
  has_many :photos

  default_scope where('visible = 1')
end

class Photo < ActiveRecord::Base
  belongs_to :product
end

my_photo.product

输出为nil, 因为default_scope

使用unscope解决方式：

belongs_to :product, -> { unscope(where: :visible) }

另一个选择是覆盖getter方法和unscope super：

class Photo < ActiveRecord::Base
  belongs_to :product

  def product
    Product.unscoped{ super }
  end
end