Question

我查看了其他几个类似的帮助问题，我没有看到我的错误。我有破坏，新的，创建所有工作，但发布和显示抛出错误。同样奇怪的是，单击索引视图上的“编辑”按钮会引发错误，但直接转到http://localhost:3000/images/1会给我“显示”页面（不知道为什么它没有给出编辑页面）。

相关文件：

images_controller.rb

class ImagesController < ApplicationController
  def index
    @images = Image.all
  end

  def new
    @image = Image.new
  end

  def create
    @image = Image.new(image_params)

    if @image.save
        redirect_to images_path, notice: "Your image #{@image.name} has been uploaded."
    else
        render "new"
    end
  end

  def edit
    @image = Image.find(params[:id])
  end

  def destroy
    @image = Image.find(params[:id])
    @image.destroy
    redirect_to images_path, notice: "The image #{@image.name} has been removed from the database."
  end

  def show
    @image = Image.find(params[:id])
  end

  private
  def image_params
    params.require(:image).permit(:name, :attachment)
  end
end

的routes.rb

Rails.application.routes.draw do    
  devise_for :admin_users, ActiveAdmin::Devise.config
  ActiveAdmin.routes(self)
 resources :images#, only: [:index, :new, :create, :update, :edit, :show, :destroy]
 root "images#index" 
end

注意：我还添加了行

get 'images/edit'

get 'images/details'

但无济于事。

index.html.erb：

<% if !flash[:notice].blank? %>
  <div class="alert alert-info">
  <%= flash[:notice] %>
  </div>
<% end %>
<br />
<%= link_to "New Image", new_image_path, class: "btn btn-primary" %>
<br />
<br />
<table class="table table-bordered table-striped">
  <thead>
    <tr>
      <th>Name</th>
      <th>View Link</th>
      <th>&nbsp;</th>
    </tr>
  </thead>
  <tbody>
    <% @images.each do |image| %>
      <tr>
        <td><%= image.name %></td>
        <td><%= link_to "#{image.name}", image.attachment_url %></td>
        <td><%= button_to "Edit",  image, method: :edit, class: "btn btn-primary", confirm: "edit #{image.name}?" %></td>
        <td><%= button_to "Show",  image, method: :show, class: "btn btn-primary"%></td>
        <td><%= button_to "Delete",  image, method: :delete, class: "btn btn-danger", confirm: "Are you sure that you wish to delete #{image.name}?" %></td>
      </tr>
    <% end %>
  </tbody>
</table>

Answer 1

默认情况下，

button_to会发布您需要link_to "edit"发出请求的帖子请求。当您在浏览器中输入http://localhost:3000/images/1时，您正在获取请求，以便它可以正常工作。

link_to "Edit", edit_image_path image

检查这些链接是否为link_to和button_to http://apidock.com/rails/ActionView/Helpers/UrlHelper/link_to http://apidock.com/rails/ActionView/Helpers/UrlHelper/button_to

Answer 2

我想没有像这样的HTTP方法：

method: :edit, method: :show

尝试像这样做：

link_to "Edit", edit_image_path(image)
link_to "Show", image_path(image)

并从routes.rb

中删除此行

get 'images/edit'

资源已经创建了路径来为您编辑操作。你可以看到它http://localhost:3000/rails/info/routes

Rails“没有路由匹配POST / images / 1”错误

2 个答案: