Grails填充一个域实例 [英] Grails populating a domain instance

问题描述

我使用ag：formRemote标签来更新消息模板

 < g：formRemote url =[action：'updateStatus']update =messagesname =updateStatusForm 
 onSuccess =document.updateStatusForm.message.value ='';> 
< g：textArea name =messagevalue =cols =3rows =1/>< br /> 
 < / g：formRemote> 
  

然后这个表单在我的控制器中调用updateStatus方法

  def updateStatus（String message）{
 def status = new Post（message：params.message，author：lookupPerson（））
 status.save flush：true，failOnError：true）
 def messages = currentUserTimeline（）
 render template：'profileMessages'，collection：messages，var：'profileMessage'
} 
  

但是def状态行应该是

  def status = new Post（message：params.message，author：lookupPerson（），child：Child.get（childInstance.id）
  

在我看来，我有一个childInstance这是由用户选择。是否有无论如何，我可以在控制器中保存一个全局变量，或者我可以发送子实例参数ID在formRemote标签，我认为没有，因为我一直试图这样做今天。

任何帮助都很好。我知道的唯一方法就是将childInstance.id写入一个属性文件并重新读入，但是必须有更好的方法，因为我认为这是非常糟糕的做法。

解决方案

您可以将参数添加到< g：formRemote>

来自grails文档的示例：

 < g：formRemote name =myFormupdate =updateMe 
 url =[controller：'book'，action：'byAuthor'，params：[sort：'title'，order：'desc']]> 
作者：< input name =authortype =text/> 
< / g：formRemote> 
  

I have been stuck for a couple of days on the same problem and I am not getting anywhere.

I am using a g:formRemote tag to update a messages template

<g:formRemote url="[action: 'updateStatus']" update="messages" name="updateStatusForm"
                    onSuccess="document.updateStatusForm.message.value='';">
                    <g:textArea name="message" value="" cols="3" rows="1"/><br/>
                    <g:submitButton name="Update Status"/>
                </g:formRemote>

This form then calls a updateStatus method in my controller

def updateStatus(String message) {
        def status = new Post(message: params.message, author: lookupPerson())
        status.save(flush: true, failOnError: true)
        def messages = currentUserTimeline()
        render template: 'profileMessages', collection: messages, var: 'profileMessage'
    }

But the def status line should be

def status = new Post(message: params.message, author: lookupPerson(), child: Child.get(childInstance.id)

In my view I have a childInstance which is the selected by the user. Is there anyway I can have a global variable in the controller which is saved or can I send the child instance params id in the formRemote tag. I don't think there is as i've been trying to do it this way all today.

Any help will be good. The only way I know will work will be to write the childInstance.id to a properties file and read it back in but there must be a better way as I think this would be very bad practice.

解决方案

You can add params to <g:formRemote>

Example from the grails docs:

<g:formRemote name="myForm" update="updateMe"
              url="[controller: 'book', action: 'byAuthor', params: [sort: 'title', order: 'desc']]">
    Author: <input name="author" type="text" />
</g:formRemote>

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