AJAX Call, it returns NOT Acceptable using SPRING MVC Hibernate - ajax

Question

I'm using Spring MVC Hibernate, I'm retrieving districts and blocks from the database. District is successfully displayed but when it comes to Blocks i'm not able to display them, what can be the problem?? please help
$(document).ready(function()
{
$('#districtcode').change(function()
{
$.ajax({
type: "POST",
url: "./districtenrollment.htm",
data: "categoryCode="+ this.value,
success : function (data){
$('#blockcode').empty();
$('#blockcode').append($("<option>").val("-1").text("Select"));
for (var i = 0; i < data.length; i++) {
$('#blockcode').append($("<option>").val(data[i][1]).text(data[i][0]));
}
},
error: function(jqXHR, textStatus, errorThrown) {
alert("error:" + textStatus + " - exception:" + errorThrown);
}
});
});
});
<form:form method="POST" modelAttribute="disblo" autocomplete="off" >
<h3 id="heading"><u>Please Select</u></h3>
<table id="tab">
<tr>
<td>
User Id:
</td>
<td>
<form:input path="myid"/>
</td>
</tr>
<tr>
<td>
User name:
</td>
<td>
<form:input path="username"/>
</td>
</tr>
<tr>
<td>Select District</td>
<td>
<form:select path="mDistricts.districtcode" id="districtcode">
<form:option value="-1">Select </form:option>
<c:forEach var="c" items="${districtlist}">
<form:option value="${c.districtcode}" >${c.districtname}
</form:option>
</c:forEach>
</form:select>
</td>
</tr>
<tr>
<td>Select Block</td>
<td>
<form:select path="mBlocks.blockcode" id="blockcode">
<form:option value="-1">Select </form:option>
<c:forEach var="c" items="${blocklist}">
<form:option value="${c.blockcode}" >${c.blockname}
</form:option>
</c:forEach>
</form:select>
</td>
</tr>
</table>
</form:form>
`
This is my controller
#Autowired
private D_BDAO d_bdao;
#RequestMapping(value="Dist_Block.htm", method = RequestMethod.GET)
public ModelAndView getmodel(#ModelAttribute("disblo") usertestDisBlock db, HttpSession session) {
List<MDistricts> districtlist = d_bdao.getAllCategory();
org.springframework.web.servlet.ModelAndView model = new org.springframework.web.servlet.ModelAndView("Dist_Block");
model.addObject("districtlist", districtlist);
System.out.println("after model");
return model;
}
#RequestMapping(value = "/districtenrollment.htm", method = RequestMethod.POST)
public #ResponseBody
List<MBlocks> getmodel1(#RequestParam("categoryCode") Integer categoryCode) {
System.out.println("categoryCode="+categoryCode);
List<MBlocks> blocklist;
System.out.println("i'm here in ajax controller ");
blocklist = d_bdao.getAllBlocks(categoryCode);
System.out.println("i'm here after b_dao ");
System.out.println("c " + blocklist);
return blocklist;
}
This is my DAO Implementation
#Override
public List<MDistricts> getAllCategory() {
org.hibernate.Session session = sessionFactory.openSession();
session.beginTransaction();
String hql = "from MDistricts";
Query query = session.createQuery(hql);
List<MDistricts> districtlist = query.list();
session.close();
return districtlist;
}
#Override
public List<MBlocks> getAllBlocks(Integer districtcode) {
org.hibernate.Session session = sessionFactory.openSession();
session.beginTransaction();
SQLQuery q = session.createSQLQuery("select blockname, blockcode from test_schema.m_blocks where districtcode=:districtcode ORDER BY blockname");
q.setParameter("districtcode", districtcode);
List<MBlocks> blocklist = q.list();
session.close();
System.out.println("blocklist" + blocklist);
return blocklist;
}

Answer 1

I am not a telepath. But I can make an assumption (cause you don't provide enough information: stacktrace of the error, entity classes).
This code is incorrect
SQLQuery q = session.createSQLQuery("select blockname, blockcode from test_schema.m_blocks where districtcode=:districtcode ORDER BY blockname");
q.setParameter("districtcode", districtcode);
List<MBlocks> blocklist = q.list();
session.createSQLQuery() doesn't return List<MBlocks>, but List<Object[]>. Try this code with HQL:
Query q = session.createQuery(
"from MBlocks where districtcode = :districtcode order by blockname");
q.setParameter("districtcode", districtcode);
List<MBlocks> blocklist = q.list();
And try to log errors.