Question

我正在使用设计进行注册，并尝试嵌套表单进行注册，只有该部分不会出现在表单中

用户模型

class User < ActiveRecord::Base
  has_many :languages_users
  has_many :languages, :through => :languages_users
  accepts_nested_attributes_for :languages_users
end

registrations_controller.rb

class Users::RegistrationsController < Devise::RegistrationsController

 before_filter :configure_sign_up_params, only: [:create]
 def new
   build_resource({})
   resource.languages_users.build  
  respond_with self.resource 
 end

def create
 super
end
protected

    def configure_permitted_parameters

    devise_parameter_sanitizer.for(:sign_up) { |u|
      u.permit(:email, :password, :password_confirmation, :bio, :location, :last_name, :first_name, :nationality, :avatar, languages_users_attributes: [:language_id, :level]) }
    end
end

sign_up表单的相关部分

<%= form_for(resource, as: resource_name, url: "users/registration_path(resource_name)") do |f| %>
 <%= f.fields_for :languages_users do |lu| %>
    <br>
      <div class="fields"> 
      <%= lu.collection_select(:language_id, Language.order('language ASC').all, :id, :language) %><br>
      <%= lu.hidden_field :level, value: 1 %>
      </div>
    <% end %>
<% end %>

相关路线

Rails.application.routes.draw do
  resources :languages
  resources :languages_users
  devise_for :users
end

任何见解都将受到赞赏！

Answer 1

应该按原样运作，你确定不是：

在resource控制器操作方法和视图

registration#new

在某处调用resource.languages，这将触发您的中间language_users关系的SQL查询并将其刷新

Rails也可能会混淆，因为您的表名模式languages_users专门用于定义has_and_belongs_to_many关系中的中间表，尝试重命名模型或使用此最后一种关系类型（如果它更适合您的需求

Answer 2

<%= form_for(resource, as: resource_name, url: "users/registration_path(resource_name)") do |f| %>
 <% resource.languages_users.each do |languages_user| %>
   <%= f.fields_for languages_user do |lu| %>
    <br>
      <div class="fields"> 
      <%= lu.collection_select(:language_id, Language.order('language ASC').all, :id, :language) %><br>
      <%= lu.hidden_field :level, value: 1 %>
      </div>
    <% end %>
  <% end %>
<% end %>

嵌套表单不显示

2 个答案: