如何修复丢失的模板，应用程序/在 Rails 中创建

Question

我不断收到这个缺少模板的错误

" Missing template listings/create, application/create with {:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:erb, :builder, :raw, :ruby, :coffee, :jbuilder]}. Searched in: * "/home/codio/workspace/app/views" * "/var/lib/gems/2.2.0/gems/kaminari-0.16.3/app/views" * "/var/lib/gems/2.2.0/gems/commontator-4.10.3/app/views" * "/home/codio/.bundler/ruby/2.2.0/devise-a9d90503e903/app/views" * "/home/codio/.bundler/ruby/2.2.0/koudoku-9e73e64e5520/app/views" * "/var/lib/gems/2.2.0/gems/mailboxer-0.12.4/app/views"

，每当我尝试创建一个对象时，在堆栈溢出中进行了几次搜索后，有人建议重定向或渲染，最初在我的创建操作中，没有显式重定向，并且在创建对象后重定向已完成页面（预期的行为）。尝试了两种解决方案，但仍然遇到相同的错误，据我了解，创建操作不需要相应的视图。

如何将创建操作重定向到显示页面而不创建 一个视图？。

    listings_controller.rb
    class ListingsController < ApplicationController
       ...

      def create
        @listing = Listing.new(listing_params)
        if @listing.save
          if params[:images]
              params[:images].each { |image|
                @listing.pictures.create(image: image)
              }
           end
         (@users - [current_user]).each do |user|
            Notification.create(recipient: user, actor: current_user, action: "posted", notifiable: @listing)
         end   
         flash[:notice]= "L'annonce #{@listing.listing_number} a eté publiee avec succès."
         respond_with(@listing)  
        end
      end
         ...
  end

触发创建动作的表单是通过模态渲染的

_form.html.erb

    <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
      <div class="modal-dialog" role="document">
        <div class="modal-content">
          <div class="modal-header">
            <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
            <h4 class="modal-title">Publication d'annonce</h4>
          </div>
          <div class="modal-body"> 
             <%= form_for :listing, :url => {:action => :create} do |f| %>
              <div class="form-group row">
                   <%= f.label :name,"Titre de l'annonce", class: 'col-4 col-form-label'%> 
                <div class="col-8">
                   <%= f.text_field :name, placeholder: "Titre de l'annonce",class: "form-control here" %>  
                </div>
              </div>
              <div class="form-group row">
                <%= f.label :price,"Prix d'offre", class:'col-4 col-form-label'%>
                <div class="col-8">
                  <div class="input-group">
                    <div class="input-group-addon">
                      <i class="fa fa-usd"></i>
                    </div>
                    <%= f.text_field :price,placeholder: "Prix d'offre" ,class:"form-control here"%>
                  </div>
                </div>
              </div>
              <div class="form-group row">
                 <%= f.label :display_usd ,'Prix en USD', class: 'col-4' %>  
                <div class="col-8">
                  <div class="form-check form-check-inline">
                    <label class="form-check-label">
                      <%= f.check_box :display_usd, class:'form-check-input' %>
                      USD
                    </label>
                  </div>
                </div>
              </div>
              <div class="form-group row">
                <%= f.label :category_id,class:"col-4 col-form-label" %>
                <div class="col-8">
                  <%= f.collection_select :category_id, Category.all, :id, :name, {prompt: "choose a category"}, {class: "form-control here"}%>
                </div>
              </div>
              <div class="form-group row">
                <label for="select1" class="col-4 col-form-label">Localisation</label> 
                <div class="col-8">
                  <select id="select1" name="select1" class="form-control">
                    <option value="rabbit">Rabbit</option>
                    <option value="duck">Duck</option>
                    <option value="fish">Fish</option>
                  </select>
                </div>
              </div>
               <div class="form-group row">
                <%= f.label :image, "Image Principale", class:'col-4 col-form-label' %>   
                <div class="col-8">
                <%= f.file_field :image, class:'form-control here'%>
                </div>
              </div> 
              <div class="form-group row">
                <label class="col-4">Condition</label> 
                <div class="col-8">
                  <div class="form-check form-check-inline">
                    <label class="form-check-label">
                      <input name="radio1" type="radio" class="form-check-input" value="rabbit">
                            Usé
                    </label>
                  </div>
                  <div class="form-check form-check-inline">
                    <label class="form-check-label">
                      <input name="radio1" type="radio" class="form-check-input" value="duck">
                            Neuf
                    </label>
                  </div>
                  <div class="form-check form-check-inline">
                    <label class="form-check-label">
                      <input name="radio1" type="radio" class="form-check-input" value="fish">
                            normal
                    </label>
                  </div>
                </div>
              </div>
              <div class="form-group row">
                 <%= f.label :description,'Produit Description', class:'col-4 col-form-label' %> 
                <div class="col-8">
                  <%= f.text_area :description,class:" form-control here " do%>  
                  <span id="textareaHelpBlock" class="form-text text-muted">veuillez donner une description exacte de votre produit.</span>
                  <%end%>
                </div>
              </div>
              <div class="form-group row">
                <%= f.label :image, "Image additionel", class:'col-4 col-form-label' %>   
                <div class="col-8">
                <%= file_field_tag "images[]", type: :file, multiple: true, class:'form-control here'%>
                </div>
              </div> 
              <div class="form-group row">
                <label class="col-4">Sauvegarder sans publier</label> 
                <div class="col-8">
                  <div class="form-check form-check-inline">
                    <label class="form-check-label">
                      <input name="radio" type="radio" class="form-check-input" value="rabbit">
                            Unpublished
                    </label>
                  </div>
                </div>
              </div>
           </div>
          <div class="modal-footer">
            <button type="button" class="btn btn-default" data-dismiss="modal">Fermer</button>
            <%= f.button "Publier Produit" , class: 'btn btn-primary pull-right', data: {disable_with: "<i class='fa fa-spinner fa-spin'></i> Publication en cours..."} %> 
          </div>
          <%end%>
        </div><!-- /.modal-content -->
      </div><!-- /.modal-dialog -->
    </div><!-- /.modal -->

Answer 1

如果您使用 HTML 执行 create 操作，则会出现此错误。 create 通常没有关联的视图；您使用它来处理实体，并将用户重定向到其他地方。

因此，您应该可以使用：

redirect_to @listing

在控制器代码的末尾。

使用@listing 有点像Rails 的魔力——它更常显示为redirect_to listing_path(@listing)。

I.E.

  def create
    @listing = Listing.new(listing_params)
    if @listing.save
      if params[:images]
          params[:images].each { |image|
            @listing.pictures.create(image: image)
          }
       end
     (@users - [current_user]).each do |user|
        Notification.create(recipient: user, actor: current_user, action: "posted", notifiable: @listing)
     end   
     flash[:notice]= "L'annonce #{@listing.listing_number} a eté publiee avec succès."
     redirect_to @listing 
    end
  end

这样可以吗？

另一个常见的做法是根据对象是否成功保存到数据库而采用不同的方法。例如：

def create
  @listing = Listing.new(listing_params)
  if @listing.save
    ...
    redirect_to @listing, notice: "..."
  else
    flash.now[:alert] = "Listing failed to save" 
    render :new
  end
end

解决这个问题的一个好方法是使用生成器来查看默认情况下 Rails 如何处理事情 - 您可以在终端中使用以下内容进行挖掘：rails g controller test_controller。

希望对您有所帮助 - 如果您有任何问题，请告诉我。