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Question

我有以下情况

   class Company < ActiveRecord::Base

     has_many :depots, inverse_of: :company, :dependent => :destroy
     has_many :users, inverse_of: :company, :dependent => :destroy
     has_many :products

   end

   class Depot < ActiveRecord::Base

     has_many :products, :dependent => :destroy
     has_many :zones, :dependent => :destroy
     belongs_to :company

    end

   class Product < ActiveRecord::Base

       belongs_to :depot
       belongs_to :company

    end

    class Zone < ActiveRecord::Base
       belongs_to :depot
    end


    class User < ActiveRecord::Base
      belongs_to :company, , inverse_of: :users
    end

   ## and zone has_many locations which further has some associated models.

我想删除所有与公司相关的模型，而不是逐个调用它们。我的依赖销毁不起作用，当我试图删除该公司时，产品仍在那里。我试过替换

  dependent: :destroy #to delete_all

但没有运气。如何通过单次调用destroy to company删除所有嵌套对象？

修改

我可以打电话

 Company.reflect_on_all_associations(:has_many)

并逐个删除所有关联，但我不想采用这种方法。任何帮助？

Answer 1

I believe using the "inverse_of" clause in your models is the problem as per the last point in the rails docs on it. Remove them and give it a try. As listed in the docs:

There are a few limitations to inverse_of support:

They do not work with :through associations. They do not work with :polymorphic associations. They do not work with :as associations. **For belongs_to associations, has_many inverse associations are ignored.

Answer 2

不确定您的设置无效，但如果您使inverse_of对称，则可行：

class Company < ActiveRecord::Base
  has_many :depots, inverse_of: :company, dependent: :destroy
  has_many :users, inverse_of: :company, dependent: :destroy
  has_many :products
end

class Depot < ActiveRecord::Base
  has_many :products, inverse_of: :depot, dependent: :destroy
  has_many :zones, inverse_of: :depot, dependent: :destroy
  belongs_to :company, inverse_of: :depots
end

class Product < ActiveRecord::Base
  belongs_to :depot, inverse_of: :products
  belongs_to :company
end

class Zone < ActiveRecord::Base
  belongs_to :depot, inverse_of: :zones
end


class User < ActiveRecord::Base
  belongs_to :company, inverse_of: :users
end

原始回答

您可能想要修改类的关联方式。

在您的示例中，Depot类缺少belongs_to :company。

同样，产品belongs_to :company在Company中没有对应物。后者关联可能会被删除，并转换为has_many through，因为Depots属于公司，而产品属于Depot。

Answer 3

您是否遵循Rails方式，以便数据库中的depots表格具有company_id字段等等？

Rails破坏所有嵌套关联

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3 个答案: