Question

我试图在地图上使用g:each代码，但GSP无法识别它。

代码是：

    if(previousQuestions == null)
    {
        previousQuestions = []
    }
    def obj = AnimaisTreeMap.get(curNode)

    previousQuestions.push('question':obj.nodeDescription, 'answer': getDescOptionAnswer(optionAnswered))

g：每个标签都是：

<g:each in="${previousQuestions}" var="row" status="i">
    <div>
        <label>${row.question}</label>
        <label>${row.answer}</label>                            
    </div>
    <br/>
</g:each>

输出结果为：

[{question=vive na água, answer=Não}, {question=tem listras, answer=Sim}]

据我所知g：每个读取的对象可能是JSON格式＆＃34;属性：值＆＃34;但我的目标是＆＃34; property = value＆＃34;

我该如何解决？

已更新

看到this link后，我找到了解决方案。问题本身就是＆＃34;前进＆＃34;功能，我通过＆＃34; previousQuestions＆＃34;另一个行动。而不是＆＃34; params＆＃34;，正确的方式是＆＃34; model＆＃34;。

        forward(action:'index', model: [curNode: nextNode.id,
                                        previousNode: curNode, 
                                        curQuestion: curQuestion,
                                        previousQuestions: answersTrace])

当我需要恢复＆＃34; previousQuestions＆＃34;时，我必须使用＆＃34; request＆＃34;在控制器上注入对象。在此之后，我的代码没问了

1：此链接

Answer 1

每次拨打push()时，您似乎都会添加两张地图。尝试创建要添加到地图数组的每个地图，而不是仅传递单独的键值对。

我相信这就是你想要的：

previousQuestions.push(['question':obj.nodeDescription, 
                        'answer': getDescOptionAnswer(optionAnswered)])

Answer 2

试试这个：

//This is a far better way of checking null strings 
//shorter and also checks for '' as well as null
if(!previousQuestion)  {
   previousQuestions = []
} else {
   //this segment you have not provided so as a test ensure it 
   //matches List element above that you have declared - take a look at console
   println "this is probably your issue ${previousQuestions.getClass()} what is class here ????"
}

def obj = AnimaisTreeMap.get(curNode)

// generate a map on the fly good for iterations, 
// even though this is not iterated.

previousQuestions << ['questions': obj.nodeDescription as String, 
'answer':  getDescOptionAnswer(optionAnswered) as String]

//within genrated map above the elements have been converted to as String 
// Because you have not given the workings of getDescriptionAnswer
// in theory you should not need  as String this is just for testing

render (view: 'something', model: [previousQuestions:previousQuestions])

GSP / Groovy -g：每个都包含对象数组

2 个答案: