Question

重新开始编程，但我遇到了这个基本的问题。所以我从网站上删除了产品，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，我正在尝试在我的网站上列出的每个产品旁边添加一个删除按钮。我已经尝试使用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，但我很感激帮助。

控制器

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的代码有建议，您能提一下要添加代码的文件吗？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

为什么不想使用params？我不知道是否有可能......

使用ID您只需在视图中添加<%= link_to 'delete', ibotta_path(x.id), method: :delete %>之类的内容即可。如果您有资源路由，则路径助手应该可以为您提供。然后在控制器中添加：

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

编辑：我发现您没有使用资源路由 - 将delete 'ibotta/:id', to: 'ibotta#destroy'添加到routes.rb或仅使用resources routing

所以你的观点看起来像是：

<% @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 %>

一个注意事项 - 我认为您不应该使用变量名称，例如＆＃39; x＆＃39;在每个区块中，使用＆＃39; product＆＃39;相反，它更具描述性。

如何在不使用params的情况下添加按钮来删除数据？

1 个答案: