我找到this关于如何构建一个简单的投票系统的教程。单击投票上/下(Rails)后,简单的投票系统不会添加投票数据库?
我已经有一个用户和后模型(包括只相关列)和我使用设计:
create_table "posts", :force => true do |t|
t.string "content"
t.integer "user_id"
t.string "title"
t.integer "total_value", :default => 0 // Added by following the tutorial
end
create_table "users", :force => true do |t|
t.string "username"
end
post.rb:
class Post < ActiveRecord::Base
attr_accessible :title, :content
belongs_to :user
has_many :comments, :dependent => :destroy
has_many :votes, :dependent => :destroy
end
user.rb:
class User < ActiveRecord::Base
has_many :posts, :dependent => :destroy
has_many :comments, :dependent => :destroy
end
vote.rb:
class Vote < ActiveRecord::Base
belongs_to :post
end
迁移:
class CreateVotes < ActiveRecord::Migration
def change
create_table :votes do |t|
t.integer :post_id
t.integer :user_id
t.boolean :value
t.timestamps
end
add_index :votes, [:post_id, :user_id]
end
end
votes_controller.rb:
class VotesController < ApplicationController
def vote_up
check = Votes.find(:first,
:conditions => ["user_id = ? AND post_id = ?", session[:user_id], params[:id]])
post = Post.find(params[:id])
if check.nil?
vote = Votes.new
vote.post_id = params[:id]
vote.user_id = session[:user_id]
vote.value = true
vote.save
post.total_value += 1
post.save
render :text => post.total_value
elsif check.value == false
check.value = true
check.save
post.total_value += 2
post.save
render :text => post.total_value
else
render :text => "You have already voted up for this post."
end
end
def vote_down
check = Vote.find(:first,
:conditions => ["user_id = ? AND post_id = ?", session[:user_id], params[:id]])
post = Post.find(params[:id])
if check.nil?
vote = Vote.new
vote.post_id = params[:id]
vote.user_id = session[:user_id]
vote.value = true
vote.save
post.total_value -= 1
post.save
render :text => post.total_value
elsif check.value == true
check.value = false
check.save
post.total_value -= 2
post.save
render :text => post.total_value
else
render :text => "You have already voted down for this post."
end
end
end
组
的意见/页/ index.html.erb:
<% for i in @posts %>
<h2><%= i.title %></h2>
<p><%= i.content %></p>
<div id="total_value_<%= i.id %>"><%= i.total_value %></div>
<%= link_to "Vote up", :url => {:controller => :votes, :action => :vote_up, :id => i.id},
:update => "total_value_#{i.id}",
:remote => true %>
<%= link_to "Vote down", :url => {:controller => :votes, :action => :vote_down, :id => i.id},
:update => "total_value_#{i.id}",
:remote => true %>
<% end %>
一切都显示,没有错误,但是当我点击投票向上或否决,绝对没有任何反应。
任何建议来解决这个问题?
编辑:
我没有看到任何错误,也没有保存/终端创建消息只是这样的东西:
入门GET“/assets/application.js?body= 1“for 127.0.0.1 at 2012-02-01 06:47:50 +0800 Served asset /application.js - 304 Not Modified(0ms)[2012-02-01 06:47:50] WARN无法确定 响应主体的内容长度。响应或 设定的响应#集内容长度分块=
检查Webrick服务器登录控制台。投票是否保存?你在sql查询中看到它吗? – Johny 2012-01-31 22:43:24
@Johny没有任何反应。终端只显示如下内容:'开始GET“/assets/application.js?body=1”为127.0.0.1在2012-02-01 06:47:50 + 0800' – alexchenco 2012-01-31 22:50:35
@alexchenco你是如何解决问题的? – 2013-02-14 13:14:56