Question

我有一个错误，指出：找不到没有ID的作业。错误消息引用我的应用程序模型（application.rb）中的以下编码

job = Job.find(@job_id)

我的终端登录状态：

在2014-06-12 13:37:42为127.0.0.1开始POST“/ applications”   +0100由ApplicationsController处理#create as HTML参数：{“utf8”=＆gt;“✓”，   “authenticity_token”=＆gt; “中r36zBqgzp48ssfbOsl51EoKbxClr5oaogiqU9pwh / HE =”   “application”=＆gt; {“question”=＆gt;“我准备雇用”，“questiona”=＆gt;“我   拥有并住在这家酒店“，”jobstartdate_id“=＆gt;”“，”邮政编码“=＆gt;”“，   “description”=＆gt;“”}，“commit”=＆gt;“下一步”}   完成404未找到1ms

ActiveRecord :: RecordNotFound（无法找到没有ID的作业）：
  app / models / application.rb：22：在steps' app/models/application.rb:18:in current_step'中   app / models / application.rb:44:in last_step?' app/controllers/applications_controller.rb:32:in create'

应用程序/控制器/ applications_controller.rb

  def index
    @applications = Application.all
  end

  def show
     @application = Application.find(params[:id])
  end

  def new
    session[:application_params] ||= {}
    @application = Application.new(session[:application_params])
    @application.current_step = session[:application_step]
    @application.job_id = params[:application][:job_id]
  end

  def create
    session[:application_params].deep_merge!(params[:application]) if params[:application]
    @application = Application.new(session[:application_params]) 
    @application.current_step = session[:application_step]
    if params[:previous_button]
      @application.previous_step
    elsif @application.last_step? 
      @application.save
    else
      @application.next_step
    end

    session[:application_step] = @application.current_step
    if @application.new_record?
      render :new
    else
      session[:application_step] = session[:application_params] = nil
      flash[:notice] = "Application saved"
      redirect_to @application
    end
  end

应用程序/视图/应用/ _form.html.erb

<%= simple_form_for(@application) do |f| %>
  <% if @application.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@application.errors.count, "error") %> prohibited this application from being saved:</h2>

      <ul>
      <% @application.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <%= render "#{@application.current_step}_step", :f => f %>

  <div class="actions">
    <%= f.submit "Back", :name => "previous_button" unless @application.first_step? %>
  </div>

  <div class="actions">
    <%= f.submit "Next" %>
  </div>

  <p><%= link_to "Back to application list", applications_path %></p>

<% end %>

app / models / application.rb

class Application < ActiveRecord::Base
    attr_accessible :firstname, :lastname, :phone, :email, :question, :questiona, :questionb, :postcode, :description, :job_id, :trade_id, :budget_id, :jobstartdate_id
    attr_writer :current_step, :job_id

    belongs_to :job
    belongs_to :trade

    belongs_to :budget
    belongs_to :jobstartdate

    # validates :firstname, presence: true
    # validates :lastname, presence: true
    # validates :phone, presence: true
    # validates :email, presence: true

    def current_step
        @current_step || steps.first    
    end

    def steps
        job = Job.find(@job_id)
        if job.name == "Digital Home Network"
         %w[digital_Home_Network budget contact]
        else
            %w[bathroomInstallation budget contact]
        end 
    end

    def next_step
        self.current_step = steps[steps.index(current_step)+1]  
    end

    def previous_step
        self.current_step = steps[steps.index(current_step)-1]  
    end

    def first_step?
        current_step == steps.first 
    end

    def last_step?
        current_step == steps.last  
    end
end

Answer 1

您必须访问job_id：

self.job_id

只要它是模型中的属性，而不是初始化变量。

我不同意这种模型的更新。如果您希望在应用程序使用嵌套参数的同时创建作业，请在保存调用之前执行。您正在丢失工作验证，错误和消息，这使得工作流程变得非常复杂。

Answer 2

感谢大家的回复。问题现在已经解决了。

在模型（application.rb）中，我不得不添加到创建操作：

@ application.job_id = params [：application] [：job_id]

  def create
    session[:application_params].deep_merge!(params[:application]) if params[:application]
    @application = Application.new(session[:application_params]) 
    @application.current_step = session[:application_step]
    @application.job_id = params[:application][:job_id]
    if params[:previous_button]
      @application.previous_step
    elsif @application.last_step? 
      @application.save
    else
      @application.next_step
    end

    session[:application_step] = @application.current_step
    if @application.new_record?
      render :new
    else
      session[:application_step] = session[:application_params] = nil
      flash[:notice] = "Application saved"
      redirect_to @application
    end
  end

然后在_form.html.erb（views / application / _form.html.erb）中：我不得不添加一个隐藏的字段：

<%= simple_form_for(@application) do |f| %>
  <% if @application.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@application.errors.count, "error") %> prohibited this application from being saved:</h2>

      <ul>
      <% @application.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>
  <%= f.hidden_field :job_id, {value: @application.job_id} %>
  <%= render "#{@application.current_step}_step", :f => f %>

  <div class="actions">
    <%= f.submit "Back", :name => "previous_button" unless @application.first_step? %>
  </div>

  <div class="actions">
    <%= f.submit "Next" %>
  </div>

  <p><%= link_to "Back to application list", applications_path %></p>

<% end %>

ActiveRecord :: RecordNotFound（无法找到没有ID的作业）

2 个答案: