访问date（）变量从rails的date helper发送

本文介绍了访问date（）变量从rails的date helper发送的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 Hay，不知道我是否错过了rails的助手，但是我使用了date（）帮助器，现在我不知道如何访问返回的变量。

他的助手代码

<％= date_select（game，release_date order => [：day，：month，：year]）％>

如何在控制器中访问返回的变量？

谢谢

解决方案

date_select helpper什么Rails调用多参数属性。也就是说， release_date 属性的值分割为由 date_select helper。 date_select 按照惯例命名3个下拉菜单，以便在控制器中执行以下操作：

@game = Game.new（params [：game]）

和 release_date 属性将填入选定的日期。

或

@ game.update_attributes（params [：game]）

更新现有记录。

如果您检查参数或查看日志文件，您将看到3个单独的组件：

params [game] [release_date（1i）]＃年 params [game] [release_date（2i ）]＃月份 params [game] [r​​elease_date（3i）]＃一天

虽然您可以直接访问这些个别元素，但似乎并不是一个好主意。 date_select helper真正被设计为与ActiveRecord的 attributes = setter组合使用，在创建一个新对象或更新属性。

Hay, not sure if i've missed the point of the helpers in rails, but i used the date() helper and now i don't know how to access the variables returned.

Heres the helper code

<%=date_select("game", "release_date", :order => [:day, :month, :year])%>

How do i access the returned variables in a controller?

Thanks

解决方案

The date_select helper makes use of what Rails calls multi parameter attributes. That is, the value of the release_date attribute is split across the 3 dropdowns for day, month, year which are created by the date_select helper. date_select names the 3 dropdowns following a convention such that in your controller you can do:

@game = Game.new(params[:game])

and the release_date attribute on the new game will be populated with the date selected.

or

@game.update_attributes(params[:game])

to update an existing record.

If you inspect params or look in the log file you will see the 3 individual components:

params["game"]["release_date(1i)"] # the year params["game"]["release_date(2i)"] # the month params["game"]["release_date(3i)"] # the day

Whilst you could access these individual elements directly it doesn't seem like a good idea. The date_select helper is really designed to be used in combination with the attributes= setter of ActiveRecord which is used when creating a new object or updating attributes.