Question

我已经撰写了几篇阿拉伯埃及共和国声明,但我很抱着这个口号ty。我的情况如下:

class Product < AR::Base
  has_many :parents, :class_name => "ProductLink", :foreign_key => :to_product_id
  has_many :children, :class_name => "ProductLink", :foreign_key => :from_product_id

  # has an attribute called "identifier"

end

class ProductLink < AR::Base
  belongs_to :parent, :class_name => "Product", :foreign_key => :from_product_id
  belongs_to :child, :class_name => "Product", :foreign_key => :to_product_id
end

我想收回所有具有某种价值的儿童产品。

我已把自己tw为一味道,似乎很容易,但我一直期待它太久了。我欣赏任何帮助!

Answer 1

签字!

brand.products.joins(:children => :child).where(:children => { :child => { :searchable_identifier.matches => "2136" } } )

这发挥了巨大作用。 See the hashed participation? 这 s倒了我。

友情链接