Grails选择RemoteFunction不起作用?

问题描述

让我给一点背景.

我有一个域模型来存储用户的说说数据，我有一个单独的域模型来处理用户的电话号码，因为他们可以拥有超过1个，因此一个用户可以有多个电话号码.

I have a domain model that stores say data on users, I have a separate domain model for the suers phone numbers as they can have more that 1 so one user could have many phone numbers.

我在系统中存储了一个用户的数据，并为该用户说了2个电话号码.然后在页面上，我具有选择"列表，该列表旨在调用控制器上的操作，然后将该用户的电话号码数据传递回要呈现的视图.

I have the data for a user stored in the system and say 2 phone numbers for that user. Then on a page I have Select list that is designed to call an action on the controller and then pass that users phone numbers data back to the view to be rendered.

每个元素的代码如下:

控制器功能:

def getNumbers = {

        def user = User.get(params.phoneId.toInteger())

        [phones: user.phones]
    }

视图:

<g:select id="users" name="user_field" from="${Users}"
                optionKey="id"
                optionValue="name"
                noSelection="['':'-Choose a Name-']"
                onchange="${remoteFunction(action: 'getNumbers',
                                 update: [success: 'great', failure: 'ohno'],
                                 params: [userId: this.value ],
                                 options: '[asynchronous: false]')}" />


<g:each in="${phones?}" var="a" status="i">
                <div>

                 <g:textField name="number" required="" value="${phones?.data}"/>

                </div>
            </g:each>

运行此代码时，确实会调用Action getNumbers，但是由于某些原因，我收到以下错误消息:

When running this code the call does get made to the Action getNumbers however for some reason I get the following error message:

| Error 2013-07-03 14:25:37,700 [http-bio-8080-exec-1] ERROR errors.GrailsExceptionResolver  - NumberFormatException occurred when processing request: [POST] /app/user/getNumbers - parameters:
userId: null
For input string: "null". Stacktrace follows:
User: For input string: "null"

奇怪的是，传递的参数为null，因为我拥有此列表中的数据，还通过下面的JavaScript在页面上的文本框中显示，并且该值不为null并正确显示:

This is strange that the param passed would be null as I have the data from this list also be displayed in a text box on the page via the JavaScript below and the value is not null and displays correctly:

document.getElementById("verification").innerHTML = "<br />" + this.value;

我希望有人可以帮助我纠正这个问题，甚至告诉我实现我想要的目标的另一种方式.

I hope someone can help me to correct this issue or even tell me another way to achieve what I want.

谢谢.

推荐答案

尝试以下步骤:

1-创建一个模板:_phones.gsp

1 - create a template : _phones.gsp

<g:each in="${phones?}" var="a" status="i">
   <option value="${phones?.data}">${phones?.data}</option>
</g:each>

2-第一次选择:

<g:select id="users" name="user_field" from="${Users}"
            optionKey="id"
            optionValue="name"
            noSelection="['':'-Choose a Name-']"
            onchange="${remoteFunction(action: 'getNumbers',
                             update: [success: 'great', failure: 'ohno'],
                             params: '\'userId=\'+this.value',
                             options: '[asynchronous: false]')}" />

3-在您的第二选择中，输入以下内容:

3 - In your second select put this :

<select id="great">
</select>

4-在您的控制器中: def getNumbers = {

4 - In your controller : def getNumbers = {

    // You get the phones by User.id, i thik so :-) 'users' is a first select and contains the id selected, and provide the find in phones.
    def user = User.get(params.users.toInteger())

    [phones: user.phones]
}

对不起，我英语不好；-)

So sorry for my bad english ;-)

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