ruby-on-rails - 如何修复丢失的模板错误？

Question

我正在制作一个网站，该网站的用户页面应该允许用户创建公告帖子。

当我尝试通过网站创建新的公告帖子时，弹出如下错误:

Template is missing
Missing template announcements/create, application/create with {:locale=>[:en],     :formats=>[:html], :handlers=>[:erb, :builder, :raw, :ruby, :jbuilder, :coffee]}. Searched in: * ".../app/views"

如果我在该位置创建 create.html.erb，表单将一如既往地返回 false。

用户页面(/app/view/users/show.html.erb):

<% provide(:title, 'Admin Page') %>

<% if signed_in? %>
  <div class="container">
    <%= link_to "Sign out", signout_path, method: "delete" %>
    <br />

     <% if @announcements.any? %>
      <h3>Announcements (<%= @announcements.count %>)</h3>
      <ol>
        <%= render @announcements %>
      </ol>
      <%= will_paginate @announcements %>
    <% end %>

      <%= render 'shared/announcement_form' %>
  </div>

<% else %>
<script type="text/javascript"> window.location.href= '<%= signin_path %>' </script>
<% end %>

共享/_announcement_form.html.erb:

<%= form_for(@announcement) do |f| %>
  <%= render 'shared/error_messages', object: f.object %>

   <div class="field">
    <%= f.text_area :title, placeholder: "Compose new title..." %>
  </div>
  <div class="field">
    <%= f.text_area :content, placeholder: "Compose new announcement..." %>
  </div>
  <%= f.submit "Post", class: "btn btn-large btn-primary" %>
<% end %>

用户 Controller :

class UsersController < ApplicationController
  def new
  end

  def show
    @user = User.find(params[:id])
    @announcement = current_user.announcements.build if signed_in?
    @announcements = @user.announcements.paginate(:page => params[:a_page], :per_page  => 10)
  end
end

公告 Controller :

class AnnouncementsController < ApplicationController
  before_action :signed_in_user, only: [:create, :destroy]

  def create
    @announcement = current_user.announcements.build(announcement_params)

    if @announcement.save
      flash[:success] = "Announcement created!"
      redirect_to root_url
    else
      flash[:error] = "Failed to create announcement!"
    end
  end

  def destroy
  end

  private

  def announcement_params
    params.require(:announcement).permit(:content)
    params.require(:announcement).permit(:title)
  end
end

我已经检查过我可以在控制台中手动创建公告。我做错了什么？

Answer 1

如果 @announcement 未能在 AnnouncementsController#create 中保存，您将呈现该操作的默认 View - 在本例中为 create.html.erb 不存在。因此，您会收到所看到的错误。

通常，创建操作会重新呈现带有表单的模板。通常这是 new 操作，这意味着将 render "new" 添加到 create 操作的 else 部分.

然而，在您的情况下，它似乎在 "shared/announcements_form" 部分中，这意味着添加

render "shared/announcements_form"

到您的创建操作。