问题解决，多谢

#5 楼 @rei ok

#3 楼 @rei 好的，谢谢

#1 楼 @rei 恩 这样也能计算出订单的总花费，但是有个问题，每次我调用 order.order_total 时，代码会重复执行sale_sum+freight_charges 请问下如果我想使用 order[:order_total] 应该怎样实现啊？我的目的是在 ActiveRecord 中保存一份临时数据，下次其他代码调用此变量时不会重复计算

#1 楼 @Shy07 👌

#2 楼 @gihnius 这个好！！

lambda 

good

#7 楼 @chiangdi 很好

#1 楼 @chiangdi 好 谢谢

确认邮件报 500 错误了。。。。

怎样发帖啊

#11 楼 @hammer it's me 下面是我的 application.css 的内容，rake assets:precompile 之后 只有.right { float: right; }，没有别的，是怎么回事？另外怎么发帖啊？

/*
 * This is a manifest file that'll be compiled into application.css, which will include all the files
 * listed below.
 *
 * Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
 * or vendor/assets/stylesheets of plugins, if any, can be referenced here using a relative path.
 *
 * You're free to add application-wide styles to this file and they'll appear at the top of the
 * compiled file, but it's generally better to create a new file per style scope.
 *
 *= require_self
 *= require bootstrap_and_overrides
 *= require nested_sortable
 *= require tag_it
 *= require jquery.lightbox-0.5
 *= require morris
 *= require jquery.ui.datepicker
 *= require articles
 *= require messages
 *= require workorder
 *= require community
 *= require homepage
 */

/* require_tree . */
.right { float: right; }

第二种，更直观

搜噶

capture 是啥意思？

我是新手，没看懂。。。。cors_preflight_check 能解决跨域访问的问题吗？