Question

我是Ruby on rails的初学者，当我尝试删除我创建的对象时，我失败了。这是代码。 controller

class PuzzlesController < ApplicationController
  def index
    @puzzles = Puzzle.all
  end
  def show
    @puzzle=Puzzle.find(params[:id])
  end
  def new
    @puzzle = Puzzle.new

  end
  def create
      #render plain: params[:puzzle].inspect
    @puzzle = Puzzle.new(puzzle_params)
    if(@puzzle.save)
      redirect_to @puzzle
    else
      render 'new'
    end
  end
  def edit
    @puzzle=Puzzle.find(params[:id])
  end
  def update
    @puzzle=Puzzle.find(params[:id])
    if(@puzzle.update(puzzle_params))
      redirect_to @puzzle
    else
      render 'edit'
    end
  end
  def destroy
    @puzzle = Puzzle.find(params[:id])
    @puzzle.destroy

    redirect_to puzzle_path
  end
  private def puzzle_params
    params.require(:puzzle).permit(:title,:body,:category,:difficulty)
  end
end

show

<h2><%= @puzzle.title %></h2>
    <p><%= @puzzle.body %></p>
    <p><%= @puzzle.category %></p>
    <p><%= @puzzle.difficulty %></p>
<hr>
<%= link_to "Edit", edit_puzzle_path(@puzzle), :class => 'btn btn-default'%>
<%= link_to "Delete", puzzle_path(@puzzle),
            method: :delete,
            data: {confrim: 'are you sure? '},
             :class => 'btn btn-danger'%>

当我点击删除时，它就像重新渲染页面一样。我在互联网上搜索了很多，无法找到解决方案。

这是有关rails服务器的信息。

Started GET "/puzzles/1" for ::1 at 2017-04-02 18:51:18 +0930
Processing by PuzzlesController#show as HTML
  Parameters: {"id"=>"1"}
  Puzzle Load (0.5ms)  SELECT  "puzzles".* FROM "puzzles" WHERE "puzzles"."id" = ? LIM             IT ?  [["id", 1], ["LIMIT", 1]]
  Rendering puzzles/show.html.erb within layouts/application
  Rendered puzzles/show.html.erb within layouts/application (1.0ms)
Completed 200 OK in 63ms (Views: 46.2ms | ActiveRecord: 0.5ms)

Answer 1

更改重定向路径

redirect_to puzzles_path

Answer 2

您的代码中存在以下几个问题：

1）link_to参数列表中存在拼写错误（confirm，而不是confrim）：

<%= link_to 'Delete', puzzle_path(@puzzle),
      method: :delete,
      data: { confirm: 'are you sure? '},
      class: 'btn btn-danger' %>

2）在destroy方法结束时，您无法重定向到单一的拼图路径，因为您刚刚删除了拼图。改为重定向到索引页面：

redirect_to puzzles_path

3）但最重要的是。与method: 'delete'的链接仅适用于JavaScript和Rails 5.0取决于jQuery。因为您写道链接只是重定向到显示页面，我想您没有将Rails JavaScript文件包含到资产管道中：

# Add this to the head of your `views/layout/application.rb`:
<%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>

# Ensure that your `assets/javascripts/application.js` include the following lines:
//= require jquery
//= require jquery_ujs

确保在您的浏览器中确保加载文件时没有错误。

不能在Ruby on rails上使用delete方法

2 个答案: