我有两个简单的类Staff和Department,我想按部门列出人员,然后使用HQL在视图中显示。
首先,这些是Domain classes Staff and Department
class Staff {
String fullName
String dateOfBirth
static belongsTo = [department: Department]
}
class Department {
String department
static hasMany = [staff: Staff]
}
部门有海,陆,空等实例。
这是一个StaffController.groovy(例如,只有listbysea行动)
def listbysea() {
params.max = Math.min(params.max ? params.int('max') : 10, 100)
//Query
def staffList = Staff.executeQuery("SELECT s.fullName from Staff s join s.department d WHERE d.department = 'Sea')
[staffInstance: staffList, staffInstanceTotal: staffList.size()]
}
这是我的listbysea.gsp
<table class="table table-striped table-hover table-bordered">
<thead>
<tr>
<g:sortableColumn property="fullName" title="${message(code: 'staff.fullName.label', default: 'Full Name')}" />
<g:sortableColumn property="dateOfBirth" title="${message(code: 'staff.dateOfBirth.label', default: 'Date of Birth')}" />
</tr>
</thead>
<tbody>
<g:each in="${staffList}" status="i" var="staffInstance">
<tr class="${(i % 2) == 0 ? 'even' : 'odd'}">
<td style="vertical-align: middle;"><g:link action="show" id="${staffInstance.id}"> ${fieldValue(bean: staffInstance, field: "fullName")}</g:link></td>
<td style="vertical-align: middle;"> ${fieldValue(bean: staffInstance, field: "dateOfBirth")}</td>
</tr>
</g:each>
</tbody>
</table>
但是,表中没有显示数据,我不确定查询是否确实不会产生任何结果,或者视图是否存在问题。所以我问我是否在将查询结果返回给视图时做了正确的事情。我甚至尝试了这个查询
def staffList = Staff.executeQuery("SELECT new map(s.fullName as fullName, d.department as department)\
FROM Staff as s, Department as d \
WHERE s.department = d HAVING s.department = ('Sea')")
但仍然没有显示结果。
欣赏任何提示。
答案 0 :(得分:0)
控制器中的变量名与gsp文件使用的名称不匹配。
在控制器中,您使用staffInstance
:
def staffList = Staff.executeQuery("SELECT s.fullName from Staff s join s.department d WHERE d.department = 'Sea')
[staffInstance: staffList, staffInstanceTotal: staffList.size()]
但是在gsp中你使用staffList
:
<g:each in="${staffList}" status="i" var="staffInstance">
尝试将控制器更改为:
[staffList: staffList, staffInstanceTotal: staffList.size()]