Question

我收到以下错误：

Cannot modify association 'Business#placements' because the source reflection class 'Placement' is associated to 'Employee' via :has_many.

我的模型如下：

class Employee < ActiveRecord::Base
  belongs_to :business
  has_many :votes, dependent: :destroy
  has_many :placements

class Placement < ActiveRecord::Base
  belongs_to :employee
  belongs_to :business

class Vote < ActiveRecord::Base
  belongs_to :employee

class Business < ActiveRecord::Base
  has_many :employees, dependent: :destroy
  has_many :placements, through: :employees

我打电话时发生错误

@employee.votes.create!(phone_id: 35435656)

我出错的任何想法？

Answer 1

从您的展示位置模型中删除belongs_to：business：

class Employee < ActiveRecord::Base
  belongs_to :business
  has_many :votes, dependent: :destroy
  has_many :placements

class Placement < ActiveRecord::Base
  belongs_to :employee

class Vote < ActiveRecord::Base
  belongs_to :employee

class Business < ActiveRecord::Base
  has_many :employees, dependent: :destroy
  has_many :placements, through: :employees

Answer 2

您需要删除

belongs_to :business

来自展示位置

它通过员工协会属于业务，因此您只需拥有belongs_to员工。

Answer 3

员工有多个展示位置，Placement属于Employee，Business通过Employee进行多次展示。因此，业务与通过员工的放置相关联，其中放置本身属于员工。因此，您只需要删除

belongs_to :business

来自Placement的

。

Answer 4

联合，

Business model has_many :placements, through: :employees

和

Employes belongs_to :business

所以我们不需要belongs_to：业务在Placement Model

错误有很多通过

4 个答案: