ruby-on-rails - 如何在不使用参数的情况下添加按钮来删除数据？

Question

重新开始编程，但我在处理这个基本问题时遇到了麻烦。所以我从网站上抓取了产品，然后将它们插入到数据库中。然后我在我的网站上列出这些产品。现在我想在我网站上列出的每个产品旁边添加一个删除按钮。我试过使用在 stackoverflow 上找到的解决方案，但我似乎无法让它们中的任何一个工作。我知道这是一个基本问题，但我感谢您的帮助。

Controller

class IbottaController < ApplicationController

def save
    require 'watir'
    require 'phantomjs'

    @browser = Watir::Browser.new:phantomjs
    @browser.goto "https://ibotta.com/rebates"
    @button = @browser.button(class: "see-more-label")

    Ibotta.delete_all
    # if x = 24 then I get 492 products 
    # if x = 23 then I get 472 products
    x = 24
    y = 0
    while y < x 
    @button.click
    y+=1
    end

    @products = @browser.divs(class: "offer-card")

    @products.each do |a|
        # if Ibotta.find_by title: a.imgs[0].alt

        if a.divs[2].text.split("").include?('%')

        else
            value_placeholder = a.divs[3].text.split(" ")
            value_placeholder.delete("cash")
            value_placeholder.delete("back")
            value_placeholder = value_placeholder.join(" ").split("")
            value_placeholder.delete("$")
            value_placeholder = value_placeholder.join("")

            Ibotta.create(title: a.imgs[0].alt, values: value_placeholder, store: a.divs[5].text, link: a.links[0].href)
        end
    end
    @products = Ibotta.all
end


def show
    @products = Ibotta.all
end


def delete
    Ibotta.delete_all
    @products = Ibotta.all
end


def practice

end

end

查看

<h1>Show Page for iBotta</h1>

<h3><%= @products.length %> products in the iBotta DB</h3>

<% @products.each do |x| %>
    <p>Title: <a href=<%=x.link%>><%= x.title %></a> </p> 
    <p>Value: <%= x.values %> </p>
    <p>Store: <%= x.store %> </p>
<% end %>

如果您对我需要添加哪些代码也有建议，您能否提及将代码添加到哪个文件中？谢谢。

路线

Rails.application.routes.draw do
  resources :articles

  get 'scraper/ibotta'
  get 'scraper/checkout51'
  get 'ibotta/save'
  get 'ibotta/show'
  get 'ibotta/delete'
  get 'targetcoupon/save'
  get 'targetcoupon/delete'
  get 'targetcoupon/show'
  get 'targetibottum/delete'
  get 'targetibottum/show'
  get 'targetibottum/save'
  get 'savingstar/delete'
  get 'savingstar/save'
  get 'savingstar/show'
  get 'ibottasavingstar/show'
  get 'ibottasavingstar/save'
  get 'ibottasavingstar/delete'
  get 'targetcoupon/practice'
  get 'targetibottasavingstar/show'
  get 'targetibottasavingstar/save'
  get 'targetibottasavingstar/delete'
  get 'checkout51/save'  
  get 'checkout51/show' 
  get 'checkout51/delete'
  get 'checkout51/practice'

  get 'ibotta/practice'

  get 'ibottacheckout51/save'  
  get 'ibottacheckout51/show' 
  get 'ibottacheckout51/delete'

  get 'ibottacheckout51/practice'  

  get 'newcheckout51/save'  
  get 'newcheckout51/show' 
  get 'newcheckout51/delete'

  get 'smiths/save'
  get 'smiths/show'
  get 'smiths/delete'
  get 'smiths/practice'

Answer 1

你为什么不想使用参数？我不知道是否有可能...

使用 ID 您可以简单地添加类似 <%= link_to 'delete', ibotta_path(x.id), method: :delete %> 的内容在您看来。如果您有资源路由，路径助手应该对您可用。然后在 Controller 中添加:

    def destroy
      Ibotta.find(params[:id]).destroy
      redirect_to your_redirect_path
    end

编辑:我看到您没有使用资源路由 - 添加 delete 'ibotta/:id', to: 'ibotta#destroy'给你的routes.rb或者只使用 resources routing

所以你的 View 看起来像:

<% @products.each do |x| %>
    <p>Title: <a href=<%=x.link%>><%= x.title %></a> </p> 
    <p>Value: <%= x.values %> </p>
    <p>Store: <%= x.store %> </p>
    <p><%= link_to 'delete', ibotta_path(x.id), method: :delete %></p>
<% end %>

请注意 - 我认为您不应该在每个 block 中使用像“x”这样的变量名，而是使用“product”，它更具描述性。