Ruby on rails Rails多态联接表以两种方式工作

我开始学习更高级的关联，多态联接表看起来非常有趣，但我遇到了一个不好的限制

我的型号：

school\u class.rb:

class SchoolClass < ActiveRecord::Base
  has_many :class_of_schools, as: :school_model, dependent: :destroy
  has_many :basic_primary_schools, through: :class_of_schools
  has_many :basic_shugenja_schools, through: :class_of_schools
  has_many :basic_monk_schools, through: :class_of_schools
end

class ClassOfSchool < ActiveRecord::Base
  belongs_to :school_model, polymorphic: true
  belongs_to :school_class
end

class BasicPrimarySchool < ActiveRecord::Base

  has_many :class_of_schools, as: :school_model, dependent: :destroy
  has_many :school_classes, through: :class_of_schools
end

class CreateClassOfSchools < ActiveRecord::Migration
  def change
    create_table :class_of_schools do |t|
      t.integer :school_class_id
      t.integer :school_model_id
      t.string :school_model_type

      t.timestamps null: false
    end
  end
end

我的问题：

class SchoolClass < ActiveRecord::Base
  has_many :class_of_schools, as: :school_model, dependent: :destroy
  has_many :basic_primary_schools, through: :class_of_schools
  has_many :basic_shugenja_schools, through: :class_of_schools
  has_many :basic_monk_schools, through: :class_of_schools
end

class ClassOfSchool < ActiveRecord::Base
  belongs_to :school_model, polymorphic: true
  belongs_to :school_class
end

class BasicPrimarySchool < ActiveRecord::Base

  has_many :class_of_schools, as: :school_model, dependent: :destroy
  has_many :school_classes, through: :class_of_schools
end

class CreateClassOfSchools < ActiveRecord::Migration
  def change
    create_table :class_of_schools do |t|
      t.integer :school_class_id
      t.integer :school_model_id
      t.string :school_model_type

      t.timestamps null: false
    end
  end
end

---

我怎样才能使这个协会双向运作？因此我可以调用

ClassSchool.first.class\u of_schools

返回与此对象关联的所有对象。并且仍然能够调用

BasicPrimarySchool.first.school\u classes

来获取相关的

school\u class

对象。

只需删除school class关系中的

as:：school\u model

has_many :class_of_schools, dependent: :destroy

编辑

将

学校班级中的关系更改为

有很多：基础小学，通过：：班级小学，来源：：学校模型，来源类型：“基本小学”
它像学校班级一样工作。班级小学现在返回这些对象的数组：）但当我尝试获取学校班级时，首先，基础小学小学，我得到
ActiveRecord:：hasmanythroughsourceassociationnotfound错误：找不到源关联
正确答案是
有很多：基础小学，通过：：班级学校，源：：学校模型，源类型：“基本小学”
但我会将答案标记为正确，请更新它。