﻿<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>博客园-The Last Day Of Summer-随笔分类-Ruby On Rails</title><link>http://www.cnblogs.com/dahuzizyd/category/97947.html</link><description>.NET技术 C# ASP.net ActiveReport SICP 代码生成 报表应用 RDLC</description><language>zh-cn</language><lastBuildDate>Wed, 04 Jun 2008 06:34:55 GMT</lastBuildDate><pubDate>Wed, 04 Jun 2008 06:34:55 GMT</pubDate><ttl>60</ttl><item><title>Ruby on rails开发从头来（五十九）- ActiveRecord基础（预加载子记录）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/06/04/ruby_rails_study_59.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Wed, 04 Jun 2008 06:07:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/06/04/ruby_rails_study_59.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1213447.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/06/04/ruby_rails_study_59.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1213447.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1213447.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 预加载子记录讨论的问题和“延迟加载”是相同的。通常Active Record会推迟从数据库中加载子记录，直到你需要他们，例如，通过Rdoc中的例子，我们假定博客程序有一个Model，像下面这样：&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/06/04/ruby_rails_study_59.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1213447.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-06-04 14:07 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/06/04/ruby_rails_study_59.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（五十八）- ActiveRecord基础（自关联）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/05/07/ruby_rails_study_58.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Wed, 07 May 2008 02:24:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/05/07/ruby_rails_study_58.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1186358.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/05/07/ruby_rails_study_58.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1186358.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1186358.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 或许存在这样的情况，在一个表中，一条记录关联到表中的另一条记录，例如，公司中的每个雇员都有上级和下级，而他们同时又是雇员，在Rails中你可以这样使用Employee类&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/05/07/ruby_rails_study_58.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1186358.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-05-07 10:24 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/05/07/ruby_rails_study_58.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>项目管理工具Redmine + SubVersion + Apache + windows环境安装搭建</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/26/redmine_subversion_apache_windows.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Sat, 26 Apr 2008 07:14:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/26/redmine_subversion_apache_windows.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1172190.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/26/redmine_subversion_apache_windows.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1172190.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1172190.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 昨天的随笔中写了使用SubVersion自带的svnserv.exe搭建版本库,这次的内容是基于Apache搭建版本库。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/26/redmine_subversion_apache_windows.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1172190.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-26 15:14 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/26/redmine_subversion_apache_windows.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>在项目管理工具Redmine中使用SubVersion进行版本管理</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/25/Redmine_SubVersion.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Fri, 25 Apr 2008 01:42:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/25/Redmine_SubVersion.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1170489.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/25/Redmine_SubVersion.html#Feedback</comments><slash:comments>1</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1170489.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1170489.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要:  在前面的随笔中，介绍了基于Rails的项目管理工具Redmine,其中提供了版本管理功能，下面介绍SubVersion（后面简称为SVN）的安装和在Redmine中的使用。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/25/Redmine_SubVersion.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1170489.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-25 09:42 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/25/Redmine_SubVersion.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（五十七）- ActiveRecord基础（多对多关联关系）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/24/ruby_rails_57.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Thu, 24 Apr 2008 01:30:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/24/ruby_rails_57.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1168670.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/24/ruby_rails_57.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1168670.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1168670.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在Rails中多对多关联通过在关联表对应的类中声明has_and_belongs_to_many来实现。<br>在数据库中，多对多关联使用中间表来实现，表中包括关联表的主键，Active Record假定这个中间表的名字是由关联表的名字根据字母的顺序串联起来得到的。例如，关联表为categories和products，中间表的名字就是categories_products。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/24/ruby_rails_57.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1168670.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-24 09:30 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/24/ruby_rails_57.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>来自Rails世界的项目管理工具Redmine</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/23/redmine.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Wed, 23 Apr 2008 10:06:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/23/redmine.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1167935.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/23/redmine.html#Feedback</comments><slash:comments>17</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1167935.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1167935.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在以前的一篇随笔里提到一个bug跟踪工具Bugtrack.net，是比较简单的工具，只限于跟踪bug。如今时过境迁，好工具也一茬茬的往上冒，本来想看看VSTS（听说也涵盖项目管理功能），但是去微软网站上下载的时候，6张盘，700M的巨无霸体积还是让我恐惧，就找找开源的吧，也许是微软太强了，一直没有什么好的.net环境下的开源项目管理工具（得过jolt大奖的OnTimer也是要掏银子的）。先看了Trac，Rails项目用的就是这个，python实现，园子里的Zealic做了一个很方便的安装包，但是有些地方不是很方便。这才又看到基于Rails实现的Redmine，发现有一些很惹人喜欢的地方，google了一下，园子里关于这个东西的内容比较少，就自己写一篇。虽然是基于Rails的，但是完全可以用于.net的项目。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/23/redmine.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1167935.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-23 18:06 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/23/redmine.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（五十六）- ActiveRecord基础（一对多关联关系）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/22/ruby_rails_study_56.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Tue, 22 Apr 2008 05:53:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/22/ruby_rails_study_56.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1165514.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/22/ruby_rails_study_56.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1165514.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1165514.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 一对多关联可以使我们表示一组对象，例如，一个order可以包含有任意多个line item，在数据库中，所有的line item记录都通过外键关联到特定的order。<br>在Active Record中，通过在父对象中的has_many来定义到子对象的关联，在子对象中使用belongs_to来指定父对象。我们已经在上一篇中了解了belongs_to声明，实际上，在一对多的情况下，和一对一是相同的，所以我们来了解has_many声明。<br>&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/22/ruby_rails_study_56.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1165514.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-22 13:53 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/22/ruby_rails_study_56.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（五十五）- ActiveRecord基础（一对一关联关系）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/21/ruby_rails_study_55.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Mon, 21 Apr 2008 03:33:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/21/ruby_rails_study_55.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1163595.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/21/ruby_rails_study_55.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1163595.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1163595.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 一对一关联，或者更正确的说是一对零或一对一关联，是通过外键引用到另外一张表中的至多一条记录实现的&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/21/ruby_rails_study_55.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1163595.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-21 11:33 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/21/ruby_rails_study_55.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（五十四）- ActiveRecord基础（指定关联关系）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/18/ruby_rails_study_54.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Fri, 18 Apr 2008 05:21:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/18/ruby_rails_study_54.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1159766.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/18/ruby_rails_study_54.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1159766.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1159766.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: Rails支持三种表间关联关系，一对一，一对多，多对多，你需要在Model中加入声明来标识这些关联：has_one，has_many，belongs_to，has_and_belongs_to_many。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/18/ruby_rails_study_54.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1159766.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-18 13:21 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/18/ruby_rails_study_54.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（五十三）- ActiveRecord基础（表关联）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/16/ruby_rails_study.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Wed, 16 Apr 2008 05:33:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/16/ruby_rails_study.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1156035.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/16/ruby_rails_study.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1156035.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1156035.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 很多程序使用的数据库都包含有多个表，而且通常一些表之间还有关联关系，订单常含有多个条目，而一个条目又关联到一种商品，一个商品可能又属于多个商品分类，一个商品分类里又包含有多个不同的商品。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/16/ruby_rails_study.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1156035.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-16 13:33 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/16/ruby_rails_study.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（五十二）- ActiveRecord基础（删除记录）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/15/ruby_rails_study_52.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Tue, 15 Apr 2008 12:15:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/15/ruby_rails_study_52.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1154884.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/15/ruby_rails_study_52.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1154884.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1154884.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: Active Record提供了两种方式进行删除操作。首先，有两个类级别的方法，delete和delete_all，这两个操作处在数据库层面上，delete()方法接收一个或一组和数据库对应的id，delete_all()方法删除所有符合指定条件的记录，如果没有指定条件，就会删除所有的记录。方法的返回值和具体的数据库适配器相关，例如oracle返回被影响的行数。如果没有记录被删除，也不会抛出异常。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/15/ruby_rails_study_52.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1154884.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-15 20:15 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/15/ruby_rails_study_52.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（五十一）- ActiveRecord基础（并发处理）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/15/ruby_rails_study_51.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Tue, 15 Apr 2008 02:50:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/15/ruby_rails_study_51.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1154003.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/15/ruby_rails_study_51.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1154003.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1154003.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在学习Rails中的并发处理的处理前，我们先简单了解下并发处理的概念。<br><br>在有多个处理同时访问同一个数据库的应用程序中，可能会出现这样的情况，因为一个处理更新了数据库中的行，而使得另一个处理中持有的数据变得陈旧了。例如，A和B先后从数据库中提取了相同的数据，并都做了修改，这时B先将自己的修改更新会数据库，稍后，A将自己的修改更新回数据库，这时将会覆盖B所作的修改，当B再次提取数据库后，看到的是A修改的结果，而不是自己的。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/15/ruby_rails_study_51.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1154003.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-15 10:50 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/15/ruby_rails_study_51.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（五十）- ActiveRecord基础（更新记录）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/10/ruby_rails_study_50.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Thu, 10 Apr 2008 05:18:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/10/ruby_rails_study_50.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1146619.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/10/ruby_rails_study_50.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1146619.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1146619.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要:  前面了解了检索的方法，这次来看看Active Record怎样更新数据库中的记录。<br>    如果你有一个Active Record对象（或许对应于order表）,你可以通过调用save方法将它写道数据库中去，如果这个对象是先前从数据库中读取出来的，save方法将会更新既有的记录，否则将会新建一条记录。<br>&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/10/ruby_rails_study_50.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1146619.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-10 13:18 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/10/ruby_rails_study_50.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（四十九）- ActiveRecord基础（行数和再加载数据）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/09/ruby_rails_study_49.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Wed, 09 Apr 2008 01:36:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/09/ruby_rails_study_49.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1144070.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/09/ruby_rails_study_49.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1144070.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1144070.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: Active Record提供了两个方法来获取符合条件的记录的条数：count()和count_by_sql()&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/09/ruby_rails_study_49.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1144070.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-09 09:36 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/09/ruby_rails_study_49.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（四十八）- ActiveRecord基础（动态查询）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/08/ruby_rails_study_48.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Tue, 08 Apr 2008 02:42:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/08/ruby_rails_study_48.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1141804.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/08/ruby_rails_study_48.html#Feedback</comments><slash:comments>2</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1141804.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1141804.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要:  数据库上最常运行的查询莫过于根据指定条件返回符合的结果集，查询可能是返回所有名字为‘dave’的订单，或者是某个博客上所有标题含Rails的post，在很多其他的框架和程序设计语言中，你需要创建sql来执行查询，Active Record利用了ruby语言所包含的动态能力来做这些事。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/08/ruby_rails_study_48.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1141804.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-08 10:42 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/08/ruby_rails_study_48.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（四十七）- ActiveRecord基础（强大的find方法）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/07/ruby_rails_study_47.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Mon, 07 Apr 2008 04:52:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/07/ruby_rails_study_47.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1140210.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/07/ruby_rails_study_47.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1140210.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1140210.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要:     现在我们知道如何指定条件，现在我们来看看find方法支持的一些其他设置。<br>    首先，理解find(:first,…)方法是非常重要的，该方法在同样的conditions设置下，和find(:all,…)方法生成同样的sql语句，不同之处仅在于只返回一条记录。在调用的时候，一种的参数为:first，另一种为:all。<br>&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/07/ruby_rails_study_47.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1140210.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-07 12:52 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/07/ruby_rails_study_47.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（四十六）- ActiveRecord基础（SQL和Active Record）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/02/ruby_rails_study_46.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Wed, 02 Apr 2008 05:17:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/02/ruby_rails_study_46.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1134416.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/02/ruby_rails_study_46.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1134416.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1134416.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 想象一下Active Record是如何处理SQL的，我们来看看find方法的:conditions参数，调用的时候像这样：find(:all,:conditions=>…)，这里的:conditions参数决定了find方法将返回哪些记录，它相当于Sql语句的where部分，例如，要获取所有的名字为Dave，pay_type为po的订单，我们这样写&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/02/ruby_rails_study_46.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1134416.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-02 13:17 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/02/ruby_rails_study_46.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（四十五）- ActiveRecord基础（读取记录）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/04/01/ruby_rails_study_45.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Tue, 01 Apr 2008 01:59:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/04/01/ruby_rails_study_45.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1132252.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/04/01/ruby_rails_study_45.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1132252.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1132252.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 读取记录包括指定那些特定的数据是你感兴趣的，你给Active Record指定标准，Active Record再返回给你一些对象，其中包含了符合条件的记录的数据。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/04/01/ruby_rails_study_45.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1132252.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-04-01 09:59 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/04/01/ruby_rails_study_45.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（四十四）- ActiveRecord基础（创建记录）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/03/31/ruby_rails_study_44.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Mon, 31 Mar 2008 02:13:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/03/31/ruby_rails_study_44.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1130729.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/03/31/ruby_rails_study_44.html#Feedback</comments><slash:comments>1</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1130729.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1130729.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: Active Record使得实现CRUD的数据库基本操作变得简单，在下面的几节里我们使用Mysql数据库中的orders表来进行CRUD的操作，这次先看创建（Create）。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/03/31/ruby_rails_study_44.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1130729.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-03-31 10:13 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/03/31/ruby_rails_study_44.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（四十三）- ActiveRecord基础（连接数据库）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/03/26/ruby_rails_43.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Wed, 26 Mar 2008 09:28:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/03/26/ruby_rails_43.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1123433.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/03/26/ruby_rails_43.html#Feedback</comments><slash:comments>4</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1123433.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1123433.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: Active Record抽象了数据库连接的概念，帮助应用程序来处理底层的数据库链接的细节，作为替代，Active Record使用通用的调用，将细节委托给一组数据库适配器。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/03/26/ruby_rails_43.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1123433.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-03-26 17:28 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/03/26/ruby_rails_43.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（四十二）- ActiveRecord基础（主键和ID）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/03/24/ruby_rails_study_42.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Mon, 24 Mar 2008 03:03:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/03/24/ruby_rails_study_42.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1119359.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/03/24/ruby_rails_study_42.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1119359.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1119359.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要:  也许你已经注意到了,在我们前面的代码中，数据库定义里都使用了一个integer型的字段id作为主键，这是Active Record的一个约定。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/03/24/ruby_rails_study_42.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1119359.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-03-24 11:03 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/03/24/ruby_rails_study_42.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（四十一）- ActiveRecord基础（存储结构化数据）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/03/21/ruby_rails_study_41.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Fri, 21 Mar 2008 12:33:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/03/21/ruby_rails_study_41.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1116972.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/03/21/ruby_rails_study_41.html#Feedback</comments><slash:comments>2</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1116972.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1116972.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要:  有时，能够在某个属性中直接存储任意的ruby对象是很方便的，一种办法就是Active Record支持序列化，将一个ruby对象变为一个YMAL字符串，并且将这个字符串存储到属性对应的数据库字段中。在数据库定义中，这个字段必须为text类型。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/03/21/ruby_rails_study_41.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1116972.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-03-21 20:33 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/03/21/ruby_rails_study_41.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（四十）- ActiveRecord基础（Boolean属性）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/03/18/ruby_rails_study_40.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Tue, 18 Mar 2008 03:15:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/03/18/ruby_rails_study_40.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1111173.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/03/18/ruby_rails_study_40.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1111173.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1111173.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 一些数据库支持boolean类型，而另一些则不支持，这使得Active Record要抽象boolean类型变得困难。例如，如果数据库不支持boolean类型，有的开发者使用char(1)来替代，而内容使用“t”和“f”来表示true和false，而另外一些开发者使用integer类型，0是false，1是true。即使数据库支持boolean类型，在内部也许还是使用0和1来存储。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/03/18/ruby_rails_study_40.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1111173.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-03-18 11:15 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/03/18/ruby_rails_study_40.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（三十九）- ActiveRecord基础（访问属性）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/03/14/ruby_rails_study_39.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Fri, 14 Mar 2008 03:28:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/03/14/ruby_rails_study_39.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1105288.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/03/14/ruby_rails_study_39.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1105288.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1105288.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 如果在一个model对象中有一个名为balance的属性，你可以通过索引操作符来获取该属性的值，你可以使用一个字符串或者标记，在这里我们使用标记，例如：&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/03/14/ruby_rails_study_39.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1105288.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-03-14 11:28 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/03/14/ruby_rails_study_39.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（三十八）- ActiveRecord基础（列和属性）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/03/12/ruby_rails_study_active_record_38.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Wed, 12 Mar 2008 12:21:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/03/12/ruby_rails_study_active_record_38.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1102713.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/03/12/ruby_rails_study_active_record_38.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1102713.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1102713.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: ActiveRecord中的一个对象相当于数据库中表的一行，对象的属性对应于表的列，也许你会注意到我们的Order类没有提及关于orders表的任何东西，这是因为ActiveRecord在运行时来确定这些对应关系，Active Record将数据库中的模式反应到类中。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/03/12/ruby_rails_study_active_record_38.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1102713.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-03-12 20:21 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/03/12/ruby_rails_study_active_record_38.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（三十七）- ActiveRecord基础</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/03/07/ruby_rails_study_37.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Fri, 07 Mar 2008 01:43:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/03/07/ruby_rails_study_37.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1094610.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/03/07/ruby_rails_study_37.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1094610.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1094610.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: ActiveRecord是Rails提供的一个对象关系映射(ORM)层，从这篇开始，我们来了解Active Record的一些基础内容，连接数据库，映射表，访问数据等。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/03/07/ruby_rails_study_37.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1094610.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-03-07 09:43 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/03/07/ruby_rails_study_37.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（windows）（三十六）- 调试技巧</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/02/20/ruby_rails_study_36.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Wed, 20 Feb 2008 09:09:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/02/20/ruby_rails_study_36.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1075351.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/02/20/ruby_rails_study_36.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1075351.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1075351.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 这次我们来看看一些关于调试的小提示。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/02/20/ruby_rails_study_36.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1075351.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-02-20 17:09 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/02/20/ruby_rails_study_36.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（windows）（三十五）- 日志（Log）</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/02/18/rails_ruby_study_35.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Mon, 18 Feb 2008 03:40:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/02/18/rails_ruby_study_35.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1072033.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/02/18/rails_ruby_study_35.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1072033.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1072033.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: Rails内建了Log功能，或者更准确的说，Rails暴露了Logger对象，该对象可以在所有的Rails程序中使用。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/02/18/rails_ruby_study_35.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1072033.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-02-18 11:40 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/02/18/rails_ruby_study_35.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Mongrel创建者炮轰Rails社区，并宣称和Rails社区决裂</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/01/15/Mongrel_rails.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Tue, 15 Jan 2008 01:13:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/01/15/Mongrel_rails.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1039155.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/01/15/Mongrel_rails.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1039155.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1039155.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: &nbsp;刚才在javaeye上看到ZedShaw猛烈抨击Rails社区，随后追到slashdot上看了新闻，又到作者blog里看了看原文（2007年最后写的，我这又成旧闻了），真的是咆哮，基本...&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/01/15/Mongrel_rails.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1039155.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-01-15 09:13 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/01/15/Mongrel_rails.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item><item><title>Ruby on rails开发从头来（windows）（三十三）- 命名约定</title><link>http://www.cnblogs.com/dahuzizyd/archive/2008/01/10/ruby_rails_instantrails_study_33.html</link><dc:creator>Cure</dc:creator><author>Cure</author><pubDate>Thu, 10 Jan 2008 11:34:00 GMT</pubDate><guid>http://www.cnblogs.com/dahuzizyd/archive/2008/01/10/ruby_rails_instantrails_study_33.html</guid><wfw:comment>http://www.cnblogs.com/dahuzizyd/comments/1034140.html</wfw:comment><comments>http://www.cnblogs.com/dahuzizyd/archive/2008/01/10/ruby_rails_instantrails_study_33.html#Feedback</comments><slash:comments>5</slash:comments><wfw:commentRss>http://www.cnblogs.com/dahuzizyd/comments/commentRss/1034140.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/dahuzizyd/services/trackbacks/1034140.html</trackback:ping><description><![CDATA[&nbsp;&nbsp;&nbsp;&nbsp; 摘要: 在刚开始学习Rails的时候可能会困惑于Rails时怎样自动处理命名的，比如如何根据一个名为Person的Model来到数据库中找到名为people的表，这次我们就来看看Rails里的命名约定。&nbsp;&nbsp;<a href='http://www.cnblogs.com/dahuzizyd/archive/2008/01/10/ruby_rails_instantrails_study_33.html'>阅读全文</a><img src ="http://www.cnblogs.com/dahuzizyd/aggbug/1034140.html?type=1" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://dahuzizyd.cnblogs.com/" target="_blank">Cure</a> 2008-01-10 19:34 <a href="http://www.cnblogs.com/dahuzizyd/archive/2008/01/10/ruby_rails_instantrails_study_33.html#Feedback" target="_blank" style="text-decoration:none;">发表评论</a></div>]]></description></item></channel></rss>