grails - 从 Controller 传递我的 “own” map 并将其呈现在 View 中

Question

所以这是我的 Controller 中的show()方法，其中InsitutionList作为全局变量，但是当我想从list.gsp访问此InsitutionList时，它没有呈现(也没有给出任何错误，例如null值，我认为我正在传递成功)。另外还要在下面提及gsp代码段。

def show(Long id){
    def tacticalIndustryCodeInstance = TacticalIndustryCode.get(id);
    def query = Institution.where { idParam ->
        idInstitution == idParam    
    }   
    def institution = query.find(id)
    if(!institution){
        flash.message = message(code: 'default.not.found.message', args: [message(code: 'institution.label', default: 'Institution'), id])
        redirect(action: "list")
        return
    }

    institutionList.putAt(institution.getLongName(), tacticalIndustryCodeInstance)

    if(!tacticalIndustryCodeInstance){
        flash.message = message(code: 'default.not.found.message', args: [message(code: 'tacticalIndustryCode.label', default: 'TacticalIndustryCode'), id])        
        redirect(action: "list")
        return 
    }       
    [tacticalIndustryCodeInstance: tacticalIndustryCodeInstance, institutionList: institutionList]

}

尝试了不同的事情，没有运气:

1)

                    <td><g:link action="show" id="${tacticalIndustryCodeInstance.id}">${fieldValue(bean: tacticalIndustryCodeInstance, field: "id")}</g:link></td>

                    <td>${fieldValue(bean: tacticalIndustryCodeInstance, field: "industrySector")}</td>

                    <td>${Institution.executeQuery("Select longName from Institution where idInstitution = :id?",[id : $(fieldValue(bean: tacticalIndustryCodeInstance, field: "id"))])}</td>   
                </tr>
            </g:each>

2)像这样更简单也无法正常工作

            <g:each in="${institutionList}" var="institutionListInstance">
                <td>${fieldValue(bean: institutionList, field: "longName")}</td>
            </g:each>

3)

<table id="tacticalIndustryCodeTable" class="center">
<thead>
                    <tr>                    
                        <g:sortableColumn property="id" title="${message(code: 'tacticalIndustryCode.id.label', default: 'Institution Id')}" />

                        <g:sortableColumn property="industrySector" title="${message(code: 'tacticalIndustryCode.industrySector.label', default: 'industrySector')}" />

                        <g:sortableColumn property="longName" title="${message(code: 'institution.longName.label', default: 'longName')}" />

                    </tr>
                </thead>
                <tbody>
                <g:each in="${institutionList}" var="institutionListInstance">
                    <td>${institutionListInstance.key}</td>
                    <g:each in="${institutionListInstance.value}" var="item">
                        <td>${item.id}</td>
                        <td>${item.industrysector}</td>
                </g:each>
                </tbody>
            </table>

Answer 1

看来您正在更改错误的 Action 或gsp。一旦您没有在“显示”操作中指定 View ，Grails就会渲染show.gsp，但是您希望在list.gsp上显示“institutionList”。