Ruby on rails 如何通过rails关联更改has_的方法名称？

我试图创建两个与同一个目标表有许多关系的表，但在定义关联时无法覆盖rails创建的默认方法名

情况如下：

class User < ApplicationRecord
  has_many :conference_attendees, dependent: :destroy
  has_many :conference_organizers, dependent: :destroy
  has_many :conferences, through: :conference_attendees, class_name: 'attending', dependent: :destroy
  has_many :conferences, through: :conference_organizers, source: :conference, dependent: :destroy

class ConferenceOrganizer < ApplicationRecord
  alias_attribute :organizers, :users
  belongs_to :conference
  belongs_to :user
end

class ConferenceAttendee < ApplicationRecord
  belongs_to :conference
  belongs_to :user
end

class Conference < ApplicationRecord
  has_many :conference_attendees, dependent: :destroy
  has_many :conference_organizers, dependent: :destroy
  has_many :users, through: :conference_attendees, dependent: :destroy
  has_many :organizers, through: :conference_organizers, source: :user, dependent: :destroy

class用户

我尝试访问用户参加的所有会议，然后访问用户使用以下方式组织的所有会议：

User.find(id: <id>).organizing
User.find(id: <id>).attending

User.find（id:）.org
User.find（id:）.atting

但我无法做到

User.find(id: <id>).conferences

User.find（id:）.conferences

---

默认为组织会议。如何访问参加会议？

如果需要两个关于用户和会议的联接表，可以这样设置

# app/models/user.rb
has_many :conference_attendees, dependent: :destroy
has_many :conference_organizers, dependent: :destroy
has_many :attending, through: :conference_attendees, source: :conference
has_many :organizing, through: :conference_organizers, source: :conference

# app/models/conference.rb
has_many :conference_attendees, dependent: :destroy
has_many :conference_organizers, dependent: :destroy
has_many :attendees, through: :conference_attendees, source: :user
has_many :organizers, through: :conference_organizers, source: :user

# app/models/conference_attendee.rb
belongs_to :user
belongs_to :conference

# app/models/conference_organizer.rb
belongs_to :user
belongs_to :conference

然后在“会议展示”页面上显示与会者和组织者：

# app/controllers/conferences_controller.rb
def show
  @conference = Conference.find(params[:id])
  @attendees = @conference.attendees
  @organizers = @conference.organizers
end

# app/views/conferences/show.html.erb
<h3>Organizers</h3>
<% @organizers.each do |user| %>
  <li><%= user.name %></li>
<% end %>
<h3>Attendees</h3>
<% @attendees.each do |user| %>
  <li><%= user.name %></li>
<% end %>

# app/controllers/users_controller.rb
def show
  @user = User.find(params[:id])
  @attending = @user.attending
  @organizing = @user.organizing    
end

# app/views/users/show.html.erb
<h3>Conferences Organizing</h3>
<% @organizing.each do |conference| %>
  <li><%= link_to(conference.name, conference) %><br> Date: <%= conference.date %></li>
<% end %>
<h3>Conferences Attending</h3>
<% @attending.each do |conference| %>
  <li><%= link_to(conference.name, conference) %><br> Date: <%= conference.date %></li>
<% end %>

# app/controllers/conferences_controller.rb
def show
  @conference = Conference.find(params[:id])
  @attendee_registrations = @conference.registrations.attendees
  @organizer_registrations = @conference.registrations.organizers
end

# app/views/conferences/show.html.erb
<h3>Organizers</h3>
<% @organizer_registrations.each do |registration| %>
  <li><%= link_to(registration.user.name, registration.user) %></li>
<% end %>
<h3>Attendees</h3>
<% @attendee_registrations.each do |registration| %>
  <li><%= link_to(registration.user.name, registration.user) %></li>
<% end %>

# app/controllers/users_controller.rb
def show
  @user = User.find(params[:id])
  @attending_registrations = @user.registrations.attendees
  @organizing_registrations = @user.registrations.organizers   
end

# app/views/users/show.html.erb
<h3>Conferences Organizing</h3>
<% @organizing_registrations.each do |registration| %>
  <li><%= link_to(registration.conference.name, registration.conference) %><br> 
  Date: <%= registration.conference.date %></li>
<% end %>
<h3>Conferences Attending</h3>
<% @attending_registrations.each do |registration| %>
  <li><%= link_to(registration.conference.name, registration.conference) %><br> 
  Date: <%= registration.conference.date %></li>
<% end %>

#app/controllers/conferences_controller.rb
def秀
@conference=conference.find（参数[：id]）
@与会者=@conference.attendes
@组织者=@conference.organizers
结束
#app/views/conferences/show.html.erb
组织者

与会者

然后在用户的显示页面上显示会议：

# app/controllers/conferences_controller.rb
def show
  @conference = Conference.find(params[:id])
  @attendees = @conference.attendees
  @organizers = @conference.organizers
end

# app/views/conferences/show.html.erb
<h3>Organizers</h3>
<% @organizers.each do |user| %>
  <li><%= user.name %></li>
<% end %>
<h3>Attendees</h3>
<% @attendees.each do |user| %>
  <li><%= user.name %></li>
<% end %>

# app/controllers/users_controller.rb
def show
  @user = User.find(params[:id])
  @attending = @user.attending
  @organizing = @user.organizing    
end

# app/views/users/show.html.erb
<h3>Conferences Organizing</h3>
<% @organizing.each do |conference| %>
  <li><%= link_to(conference.name, conference) %><br> Date: <%= conference.date %></li>
<% end %>
<h3>Conferences Attending</h3>
<% @attending.each do |conference| %>
  <li><%= link_to(conference.name, conference) %><br> Date: <%= conference.date %></li>
<% end %>

# app/controllers/conferences_controller.rb
def show
  @conference = Conference.find(params[:id])
  @attendee_registrations = @conference.registrations.attendees
  @organizer_registrations = @conference.registrations.organizers
end

# app/views/conferences/show.html.erb
<h3>Organizers</h3>
<% @organizer_registrations.each do |registration| %>
  <li><%= link_to(registration.user.name, registration.user) %></li>
<% end %>
<h3>Attendees</h3>
<% @attendee_registrations.each do |registration| %>
  <li><%= link_to(registration.user.name, registration.user) %></li>
<% end %>

# app/controllers/users_controller.rb
def show
  @user = User.find(params[:id])
  @attending_registrations = @user.registrations.attendees
  @organizing_registrations = @user.registrations.organizers   
end

# app/views/users/show.html.erb
<h3>Conferences Organizing</h3>
<% @organizing_registrations.each do |registration| %>
  <li><%= link_to(registration.conference.name, registration.conference) %><br> 
  Date: <%= registration.conference.date %></li>
<% end %>
<h3>Conferences Attending</h3>
<% @attending_registrations.each do |registration| %>
  <li><%= link_to(registration.conference.name, registration.conference) %><br> 
  Date: <%= registration.conference.date %></li>
<% end %>

#app/controllers/users_controller.rb
def秀
@user=user.find（参数[：id]）
@出席=@user.atting
@Organization=@user.organization
结束
#app/views/users/show.html.erb
会议组织

日期：
出席会议

日期：

---

也就是说，使用一个联接表可能比使用两个联接表更干净。我将把它放在一个单独的答案中。

因为您在相同的两个表上进行联接，所以可能更干净的做法是只进行一个联接表，然后添加一个名为status的字段来区分组织者和与会者。这样，您可以添加其他状态值，例如“presenter”

设置表格

railsg型号注册用户：参考会议：参考状态：string

<代码>rake db:迁移

设置模型关联：

# app/models/user.rb
has_many :registrations, dependent: :destroy

# app/models/conference.rb
has_many :registrations, dependent: :destroy

# app/models/registration.rb
belongs_to :user
belongs_to :conference
scope :attendees, -> { where( status: "Attendee") }
scope :organizers, -> { where( status: "Organizer") }

然后在“会议展示”页面上显示与会者和组织者：

# app/controllers/conferences_controller.rb
def show
  @conference = Conference.find(params[:id])
  @attendees = @conference.attendees
  @organizers = @conference.organizers
end

# app/views/conferences/show.html.erb
<h3>Organizers</h3>
<% @organizers.each do |user| %>
  <li><%= user.name %></li>
<% end %>
<h3>Attendees</h3>
<% @attendees.each do |user| %>
  <li><%= user.name %></li>
<% end %>

# app/controllers/users_controller.rb
def show
  @user = User.find(params[:id])
  @attending = @user.attending
  @organizing = @user.organizing    
end

# app/views/users/show.html.erb
<h3>Conferences Organizing</h3>
<% @organizing.each do |conference| %>
  <li><%= link_to(conference.name, conference) %><br> Date: <%= conference.date %></li>
<% end %>
<h3>Conferences Attending</h3>
<% @attending.each do |conference| %>
  <li><%= link_to(conference.name, conference) %><br> Date: <%= conference.date %></li>
<% end %>

# app/controllers/conferences_controller.rb
def show
  @conference = Conference.find(params[:id])
  @attendee_registrations = @conference.registrations.attendees
  @organizer_registrations = @conference.registrations.organizers
end

# app/views/conferences/show.html.erb
<h3>Organizers</h3>
<% @organizer_registrations.each do |registration| %>
  <li><%= link_to(registration.user.name, registration.user) %></li>
<% end %>
<h3>Attendees</h3>
<% @attendee_registrations.each do |registration| %>
  <li><%= link_to(registration.user.name, registration.user) %></li>
<% end %>

# app/controllers/users_controller.rb
def show
  @user = User.find(params[:id])
  @attending_registrations = @user.registrations.attendees
  @organizing_registrations = @user.registrations.organizers   
end

# app/views/users/show.html.erb
<h3>Conferences Organizing</h3>
<% @organizing_registrations.each do |registration| %>
  <li><%= link_to(registration.conference.name, registration.conference) %><br> 
  Date: <%= registration.conference.date %></li>
<% end %>
<h3>Conferences Attending</h3>
<% @attending_registrations.each do |registration| %>
  <li><%= link_to(registration.conference.name, registration.conference) %><br> 
  Date: <%= registration.conference.date %></li>
<% end %>

#app/controllers/conferences_controller.rb
def秀
@conference=conference.find（参数[：id]）
@与会者注册=@conference.registrations.attendes
@组织者注册=@conference.registrations.organizers
结束
#app/views/conferences/show.html.erb
组织者

与会者

然后在用户的显示页面上显示会议：

# app/controllers/conferences_controller.rb
def show
  @conference = Conference.find(params[:id])
  @attendees = @conference.attendees
  @organizers = @conference.organizers
end

# app/views/conferences/show.html.erb
<h3>Organizers</h3>
<% @organizers.each do |user| %>
  <li><%= user.name %></li>
<% end %>
<h3>Attendees</h3>
<% @attendees.each do |user| %>
  <li><%= user.name %></li>
<% end %>

# app/controllers/users_controller.rb
def show
  @user = User.find(params[:id])
  @attending = @user.attending
  @organizing = @user.organizing    
end

# app/views/users/show.html.erb
<h3>Conferences Organizing</h3>
<% @organizing.each do |conference| %>
  <li><%= link_to(conference.name, conference) %><br> Date: <%= conference.date %></li>
<% end %>
<h3>Conferences Attending</h3>
<% @attending.each do |conference| %>
  <li><%= link_to(conference.name, conference) %><br> Date: <%= conference.date %></li>
<% end %>

# app/controllers/conferences_controller.rb
def show
  @conference = Conference.find(params[:id])
  @attendee_registrations = @conference.registrations.attendees
  @organizer_registrations = @conference.registrations.organizers
end

# app/views/conferences/show.html.erb
<h3>Organizers</h3>
<% @organizer_registrations.each do |registration| %>
  <li><%= link_to(registration.user.name, registration.user) %></li>
<% end %>
<h3>Attendees</h3>
<% @attendee_registrations.each do |registration| %>
  <li><%= link_to(registration.user.name, registration.user) %></li>
<% end %>

# app/controllers/users_controller.rb
def show
  @user = User.find(params[:id])
  @attending_registrations = @user.registrations.attendees
  @organizing_registrations = @user.registrations.organizers   
end

# app/views/users/show.html.erb
<h3>Conferences Organizing</h3>
<% @organizing_registrations.each do |registration| %>
  <li><%= link_to(registration.conference.name, registration.conference) %><br> 
  Date: <%= registration.conference.date %></li>
<% end %>
<h3>Conferences Attending</h3>
<% @attending_registrations.each do |registration| %>
  <li><%= link_to(registration.conference.name, registration.conference) %><br> 
  Date: <%= registration.conference.date %></li>
<% end %>

#app/controllers/users_controller.rb
def秀
@user=user.find（参数[：id]）
@出席者注册=@user.registrations.attenders
@组织注册=@user.registrations.organizers
结束
#app/views/users/show.html.erb
会议组织


日期：
出席会议


日期：