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Rails 5.1应用程序中的嵌套路由问题

ruby-on-rails

Toontje · 技术社区 · 8 年前

我正在创建一个申请,让学生在考试期间登记缺勤。

我的路线如下所示:

resources :users do
  resources :absences
end

创建缺勤的表单如下所示:

<%= form_for [@user, @absence] do |f| %>
  <%= f.label :course_id, "Vak" %>
  <%= f.select :course_id, options_for_courses, label: "Vak" %>
  <%= f.label :date, "Datum" %>
  <%= f.text_field :date %>
  <%= f.submit "Afwezigheid aanvragen" %>
<% end %>

缺席模型如下所示:

class Absence < ApplicationRecord
  ...
  belongs_to :user
end

用户模型如下所示:

class User < ApplicationRecord
  ...
  has_many :absences
end

class AbsencesController < ApplicationController
  ...
  def new
    @user = current_user
    @absence = current_user.absences.build
  end

  def create
    @absence = Absence.create(absence_params)
    if @absence.save
      redirect_to root_path, notice: "Afwezigheid succesvol aangevraagd"
    else
      flash[:alert] = "Er was een probleem met het registreren van de afwezigheid"
    render :new
  end
end

但是,当我试图登记缺勤时,我在表格中得到一个错误: 错误日志如下所示:

Started POST "/users/2/absences" for 127.0.0.1 at 2017-09-21 09:51:55 +0200
Processing by AbsencesController#create as HTML
  Parameters: {"utf8"=>"â", "authenticity_token"=>"esW1HeKf+VG8+RC4Zm2F7d8BFewddk6aIssj0Y90s+UC4oTUxpO1iw9hR9M94Jfov5bjeB0aQPRHG0qvENO3Tg==", "absence"=>{"course_id"=>"2", "date"=>"27/09/2017"}, "commit"=>"Afwezigheid aanvragen", "user_id
"=>"2"}
   (0.1ms)  BEGIN
  Course Load (0.3ms)  SELECT  "courses".* FROM "courses" WHERE "courses"."id" = $1 LIMIT $2  [["id", 2], ["LIMIT", 1]]
   (0.1ms)  ROLLBACK
   (0.1ms)  BEGIN
   (0.1ms)  ROLLBACK
  Rendering absences/new.html.erb within layouts/application
  Rendered absences/new.html.erb within layouts/application (145.6ms)
Completed 500 Internal Server Error in 616ms (ActiveRecord: 0.9ms)



ActionView::Template::Error - undefined method `absences_path' for #<#<Class:0x007fb911af0420>:0x007fb90baab5d8>
Did you mean?  asset_path:
  actionpack (5.1.3) lib/action_dispatch/routing/polymorphic_routes.rb:230:in `polymorphic_method'
  actionpack (5.1.3) lib/action_dispatch/routing/polymorphic_routes.rb:138:in `polymorphic_path'
  actionview (5.1.3) lib/action_view/helpers/form_helper.rb:472:in `apply_form_for_options!'
  actionview (5.1.3) lib/action_view/helpers/form_helper.rb:440:in `form_for'

3 回复 | 直到 8 年前

Deepesh elements 8 年前

创建对象时出错,您正在执行 render :new 再次渲染表单,但使用 @user 像 nil <%= form_for [nil, @absence] do |f| %> 使路径成为 absences_path @用户 current_user 处处这样地:

 def new
   @user = current_user # You may remove this
   @absence = current_user.absences.build
 end

 def create
   @absence = Absence.create(absence_params)
   if @absence.save
     redirect_to root_path, notice: "Afwezigheid succesvol aangevraagd"
   else
     @user = current_user # If you don't want to remove this line from new action then add it here too
     flash[:alert] = "Er was een probleem met het registreren van de afwezigheid"
     render :new
   end
 end

在 form @用户 然后从控制器执行以下操作:

<%= form_for [current_user, @absence] do |f| %>

更新:

将对象保存在 create 操作更改此行:

@absence = Absence.create(absence_params)

到

@absence = current_user.absences.build(absence_params)

user_id 是零,因为没有输入框或任何隐藏字段,这是正确的。您只需要根据 . 我已经改变了到 build 因为 创造 save 它

希望这有帮助。

Salil 8 年前

你的大脑出现了问题 create 方法 new @user

在创建方法中添加以下内容(&A);再次检查

@user = current_user

-1

Oscar Luza 8 年前

redirect_to root_path, notice: "Afwezigheid succesvol aangevraagd"
return

或者删除create方法末尾的那一行

    render :new

@absence = current_user.absences.build(absence_params)