在Grails中读取g：datePicker-value，而不使用“new Object（params）”-method [英] Reading the g:datePicker-value in Grails without using the "new Object(params)"-method

问题描述

假设我有一个名为foobar的datePicker：

 < g：datePicker name =foobarvalue = $ {new Date（）}precision =day/> 
  

如何阅读此日期选择器的提交值？

一种有效但有一些不必要的副作用的方法如下：

  def newObject = new SomeClassName（params）
 printlnvalue =+ newObject.foobar 
  

它将所有提交的字段读入newObject，这是我想要避免的。我只对foobar字段的价值感兴趣。

我最初假设的方式可以是：

  def newObject = new SomeClassName（）
 newObject.foobar = params [foobar] 
  

但是Grails似乎没有自动将foobar字段翻译成一个Date（）对象。

更新：其他信息可以在 Grails JIRA 。

解决方案

读取g：datePicker值在Grails 1.2中变得更容易（参见发行说明）：

更好的日期解析

如果您从
标签提交日期，则
获取Date对象现在为
简单，从
params对象查找它e（例如params.foo
）

Let's say I have a datePicker called "foobar":

<g:datePicker name="foobar" value="${new Date()}" precision="day" />

How do I read the submitted value of this date-picker?

One way which works but has some unwanted side-effects is the following:

def newObject = new SomeClassName(params)
println "value=" + newObject.foobar

This way of doing it reads all submitted fields into newObject which is something I want to avoid. I'm only interested in the value of the "foobar" field.

The way I originally assumed this could be done was:

def newObject = new SomeClassName()
newObject.foobar = params["foobar"]

But Grails does not seem to automatically do the translation of the foobar field into a Date() object.

Updated: Additional information can be found in the Grails JIRA.

解决方案

Reading the g:datePicker value became a lot easier in Grails 1.2 (see release notes):

Better Date parsing

If you submit a date from a tag, obtaining the Date object is now as simple as looking it up from the params object by name (eg. params.foo )

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