Question

我有以下:has_many :through关系。

协会

class Profile < ActiveRecord::Base  
  has_many :teams
  has_many :projects, :class_name => "Project", :through => :teams
  has_many :leads, :class_name => "Projects"

class Project < ActiveRecord::Base
  has_many :teams
  has_many :developers, :class_name => "Profile", :through => :teams
  belongs_to :lead, :class_name => "Profile", :foreign_key => "developer_lead"

class Team < ActiveRecord::Base
  belongs_to :developer, :class_name => "Profile"
  belongs_to :project

当我尝试获取个人资料项目时，该关系不会在团队表中使用正确的密钥。

Rails C

1.9.3p194：001＆gt; Profile.first.projects

Profile Load（0.2ms）SELECT“profiles”。* FROM“profiles”LIMIT 1
  项目负载（0.2ms）SELECT“projects”。* FROM“projects”INNER JOIN“teams”ON“projects”。“id”=   “团队”。“project_id”在哪里“团队”。“profile_id”= 1

它应该使用"teams"."developer_id" = 1

我尝试在Profile和Project模型中使用:foreign_key => "developer_id"，但似乎没有任何效果。

我觉得我所做的模型的改变并没有产生任何影响，但每次更改后我都会重新启动rails控制台。

模式

create_table "profiles", :force => true do |t|
  t.datetime "created_at",          :null => false
  t.datetime "updated_at",          :null => false
end

create_table "projects", :force => true do |t|
  t.integer  "developer_lead"
  t.datetime "created_at",     :null => false 
  t.datetime "updated_at",     :null => false
end

create_table "teams", :id => false, :force => true do |t|
  t.integer  "developer_id"
  t.integer  "project_id"
  t.datetime "created_at",   :null => false
  t.datetime "updated_at",   :null => false
end

Answer 1

:foreign_key => "developer_id"属于has_many :teams。

此外，如果您坚持使用rails约定并使用“_id”结束所有foreign_key名称，它会使您的代码更清晰，如“developer_lead_id”。

有许多通过不同的外键

1 个答案: