Question

我是红宝石的新手。我想删除记录。但无法删除。请检查我的代码 -

ruby_win_sources / index.html.erb

<table border="1" cellpadding="1" cellspacing="1" width="100%">
  <thead>
    <tr>
      <th>Name</th>
      <th>Author</th>
      <th>Url</th>
      <th colspan="3">Action</th>
    </tr>
  </thead>

  <tbody>
    <% @ruby_win_sources.each do |ruby_win_source| %>
      <tr>
        <td><%= ruby_win_source.name %></td>
        <td><%= ruby_win_source.author %></td>
        <td><%= ruby_win_source.url %></td>
        <td><%= link_to 'Show', ruby_win_source %></td>
        <td><%= link_to 'Edit', edit_ruby_win_source_path(ruby_win_source) %></td>
        <td><%= link_to 'Destroy', ruby_win_source, method: :destroy, data: { confirm: 'Are you sure?' } %></td>
      </tr>
    <% end %>
  </tbody>
</table>

ruby_win_sources_controller.rb

class RubyWinSourcesController < ApplicationController
  before_action :set_ruby_win_source, only: [:show, :edit, :update, :destroy]

  # GET /ruby_win_sources
  # GET /ruby_win_sources.json
  def index
    @ruby_win_sources = RubyWinSource.all
  end

  # GET /ruby_win_sources/1
  # GET /ruby_win_sources/1.json
  def show
  end

  # GET /ruby_win_sources/new
  def new
    @ruby_win_source = RubyWinSource.new
  end

  # GET /ruby_win_sources/1/edit
  def edit
  end

  # POST /ruby_win_sources
  # POST /ruby_win_sources.json
  def create
    @ruby_win_source = RubyWinSource.new(ruby_win_source_params)

    respond_to do |format|
      if @ruby_win_source.save
        format.html { redirect_to @ruby_win_source, notice: 'Ruby win source was successfully created.' }
        format.json { render :show, status: :created, location: @ruby_win_source }
      else
        format.html { render :new }
        format.json { render json: @ruby_win_source.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /ruby_win_sources/1
  # PATCH/PUT /ruby_win_sources/1.json
  def update
    respond_to do |format|
      if @ruby_win_source.update(ruby_win_source_params)
        format.html { redirect_to @ruby_win_source, notice: 'Ruby win source was successfully updated.' }
        format.json { render :show, status: :ok, location: @ruby_win_source }
      else
        format.html { render :edit }
        format.json { render json: @ruby_win_source.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /ruby_win_sources/1
  # DELETE /ruby_win_sources/1.json
  def destroy
    @ruby_win_source.destroy
    respond_to do |format|
      format.html { redirect_to ruby_win_sources_url, notice: 'Ruby win source was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_ruby_win_source
      @ruby_win_source = RubyWinSource.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def ruby_win_source_params
      params.require(:ruby_win_source).permit(:name, :author, :url)
    end
end

删除确认框未打开。

请帮帮我

编辑 - 的的routes.rb

Rails.application.routes.draw do
  resources :ruby_win_sources
end

Answer 1

删除数据库rake db:drop，然后选择db:migrate以创建表格

Answer 2

在销毁对象时发出delete请求：

<td><%= link_to 'Destroy', ruby_win_source, method: :delete, data: { confirm: 'Are you sure?' } %></td>

您正在设置

，因此控制器看起来不错

before_action :set_ruby_win_source, only: [:show, :edit, :update, :destroy]

因此，在执行@ruby_win_source操作之前，您已经拥有destroy。

Answer 3

我认为您要删除的link_to不正确，应该是这样的：

<%= link_to 'Destroy', ruby_win_source, method: :delete, data: { confirm: 'Are you sure?' } %>

然后将控制器destroy方法更新为：

# DELETE /ruby_win_sources/1
# DELETE /ruby_win_sources/1.json
def destroy
    RubyWinSource.find_by_id(params[:id]).destroy
    respond_to do |format|
      format.html { redirect_to ruby_win_sources_url, notice: 'Ruby win source was successfully destroyed.' }
      format.json { head :no_content }
    end
end

数据未从sqlite3表中删除

3 个答案: