Question

我是Ruby on Rails世界的新手，我正在开发一个首次下载的表单，你可以在_form.html.erb中看到这里的代码：

<%= simple_form_for(@job, html: {class: 'form-horizontal'}) do |f| %>
  <div class="control-group">
    <%= f.label "Poster:", class: 'control-label' %>
    <div class="controls">
      <%= f.select(:status, options_for_select([['Nick Maloney','Nick Maloney'],
        ['Peter Brown','Peter Brown'],['Jen Morris','Jen Morris']])) %>
    </div>
  </div>
  <div class="control-group">
    <%= f.label "Category:", class: 'control-label' %>
    <div class="controls">
      <%= f.select(:status, options_for_select([['Landscaping','Landscaping'],
        ['Babysitting','Babysitting'],['Tree planting','Tree planting']])) %>
    </div>
  </div>
  <div class="control-group">
    <%= f.label "Location:", class: 'control-label' %>
    <div class="controls">
      <%= f.select(:status, options_for_select([['Dorchester','Dorchester'],
        ['Roxbury','Roxbury'],['Mattapan','Mattapan']])) %>
    </div>
  </div>
  <div class="control-group">
    <%= f.label "Status:", class: 'control-label' %>
    <div class="controls">
      <%= f.select(:status, options_for_select([['New','New'],
        ['Pending','Pending'],['Complete','Complete']])) %>
    </div>
  </div>
  <%= f.input :description, label: "Job Description" %>
  <%= f.submit 'Add Job', class: 'btn btn-default' %>
<% end %>

当我点击“添加工作”时，它会将我带到一个我无法自行解决的空白屏幕。

我在views / show.html.erb中的视图时间周围更改了代码。我有这个：

<h1><%= @job.poster %></h1>
<p><%= @job.category %></p>
<p><%= @job.location %></p>

和此：

<tbody>
  <% @job.each do |job| %>
    <tr>
      <td><%= job.poster %></td>
    </tr>
  <% end %>
</tbody>

我继续得到一个空白的屏幕，或者如果我去了我的jobs_controller.rb并像这样开发它：

class JobsController < ApplicationController
  before_action :find_job, only: [:show, :edit, :update, :destroy]

  def index
    # @job = Job.all
  end

  def show
    @job = Job.find_job(jobs_params[:id])
  end

  def new
    @job = Job.new
  end

  def create
    @job = Job.new(jobs_params)

    if @job.save
      redirect_to @job, notice: 'Your job was successfully added'
    else
      render "New"
    end
  end

  def edit

  end

  def update

  end

  def destroy

  end

  private

  def jobs_params
    params.require(:job).permit(:poster, :category, :location, :status, :description)
  end

  def find_job
    @job = Job.find(params[:id])
  end
end

我会为ActiveRecord对象获取一个未定义的'poster'方法，但如果我删除show动作中的代码，我只会得到一个空白页面。我在这里没有解决方案而且我已经看过了，但对我来说没有任何解决方案。

我的routes.rb文件如下所示：

Rails.application.routes.draw do
  resources :jobs
  root 'jobs#index'
end

我更改了show动作以反映这一点：

def show
    @job = Job.find(jobs_params[:id])
end

然后我丢失了一个参数或者值为空：job。

我做了一个rails控制台，我有这个：

Job Load (1.1ms) SELECT "jobs".* FROM "jobs" LIMIT ? [["LIMIT", 11]] => #<ActiveRecord::Relation [#<Job id: 1, poster: nil, category: nil, location: nil, status: "New", description: "Your job is to plant trees all over the Dorchester...", created_at: "2017-08-01 10:29:40", updated_at: "2017-08-01 10:29:40">]>

我不明白为什么我对除了描述之外的所有事情都没有。

似乎每个表单输入都是这样的：

<div class="control-group">
    <%= f.label "Poster:", class: 'control-label' %>
    <div class="controls">
      <%= f.select(:status, options_for_select([['Nick Maloney','Nick Maloney'],
        ['Peter Brown','Peter Brown'],['Jen Morris','Jen Morris']])) %>
    </div>

在rails控制台中给我一个零，只有这一个：

<%= f.input :description, label: "Job Description" %>

成功输入了数据，因此f.select的代码有问题，但我不确定是什么。

Answer 1

更改此

  def show
    @job = Job.find_job(jobs_params[:id])
  end

到这个

  def show
  end

由before_action

为您检索@job记录

并在show.html.erb中使用它

<h1><%= @job.poster %></h1>
<p><%= @job.category %></p>
<p><%= @job.location %></p>

Answer 2

从JobsController中的show动作中删除此行：

@job = Job.find_job(jobs_params[:id])

Answer 3

尝试将_form.html.erb替换为

<%= simple_form_for(@job, html: {class: 'form-horizontal'}) do |f| %>
  <div class="control-group">
    <%= f.label "Poster:", class: 'control-label' %>
    <div class="controls">
      <%= f.select(:poster, options_for_select([['Nick Maloney','Nick Maloney'],
        ['Peter Brown','Peter Brown'],['Jen Morris','Jen Morris']])) %>
    </div>
  </div>
  <div class="control-group">
    <%= f.label "Category:", class: 'control-label' %>
    <div class="controls">
      <%= f.select(:category, options_for_select([['Landscaping','Landscaping'],
        ['Babysitting','Babysitting'],['Tree planting','Tree planting']])) %>
    </div>
  </div>
  <div class="control-group">
    <%= f.label "Location:", class: 'control-label' %>
    <div class="controls">
      <%= f.select(:location, options_for_select([['Dorchester','Dorchester'],
        ['Roxbury','Roxbury'],['Mattapan','Mattapan']])) %>
    </div>
  </div>
  <div class="control-group">
    <%= f.label "Status:", class: 'control-label' %>
    <div class="controls">
      <%= f.select(:status, options_for_select([['New','New'],
        ['Pending','Pending'],['Complete','Complete']])) %>
    </div>
  </div>
  <%= f.input :description, label: "Job Description" %>
  <%= f.submit 'Add Job', class: 'btn btn-default' %>
<% end %>

在控制器中

   def show
   end

show.html.erb

<h1><%= @job.poster %></h1>
<p><%= @job.category %></p>
<p><%= @job.location %></p>

你有

工作ID：1，海报：零，类别：零，地点：零，状态：＆＃34;新＆＃34;，描述：＆＃34;你的工作是种植树木多尔切斯特...＆＃34;

因为mistek您在:status

中的每个select使用了_form.html.erb

如何显示我的显示页面以显示数据？

3 个答案: