How to display HQL result to view in grails.? - grails

Question

I have two simple classes Staff and Department and I want to list staff by department using HQL that then displayed in a view.
First of all these are Domain classes Staff and Department
class Staff {
String fullName
String dateOfBirth
static belongsTo = [department: Department]
}
class Department {
String department
static hasMany = [staff: Staff]
}
Department has instances such as Sea, Land, Air.
Here is a StaffController.groovy (only a listbysea action for example)
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()]
}
This is my 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>
However, there is no data shown in the table and I am not sure whether the query indeed does not yields any results at all or it is the problem with the view. So I am asking did I do the right thing in returning the query result to the view.? I even tried this query
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')")
But still no result displayed.
Appreciate any hint.

Answer 1

The variable name you have in your controller doesn't match what the gsp file is using.
In the controller you use staffInstance:
def staffList = Staff.executeQuery("SELECT s.fullName from Staff s join s.department d WHERE d.department = 'Sea')
[staffInstance: staffList, staffInstanceTotal: staffList.size()]
But in the gsp you use staffList:
<g:each in="${staffList}" status="i" var="staffInstance">
Try changing the controller to:
[staffList: staffList, staffInstanceTotal: staffList.size()]