HQL hibernate jpa - spring

Question

I have an HQL query from my repository and I want to get information from my class where condition class type = string. The error is field is not present.
View:
<div layout:fragment="content">
<div class="col-sm-12">
<div class="panel panel-primary">
<div class="panel-heading">Mes demandes</div>
<div class="panel-body">
<form th:action="#{/demande}" method="post">
<div>
<label>Type de la demandes:</label>
<select name="field">
<option th:value="Demande_absence">Demande d'absence</option>
<option th:value="Demande_conge">Demande de congé</option>
<option th:value="Demande_document">Demande de documtents</option>
<option th:value="Demande_pret">Demande de prêt</option>
</select>
<button type="submit" class="btn btn-primary">Chercher</button>
</div>
</form>
<form th:action="#{/AddDemande}" method="post">
<button type="submit" class="btn btn-primary">Ajouter une demande</button>
</form>
<div class="container-fluid spacer50">
<h3 class="text-danger">Liste des demandes</h3>
<table class="table">
<thead>
<tr>
<th>Code</th><th>date</th><th>TYPE_DEM</th>
</tr>
</thead>
<tbody>
<tr th:each="p:${listdemandes}">
<td th:text="${p.codeDemande}"></td>
<td th:text="${p.dateDemande}"></td>
<td th:text="${p.class.simpleName}"></td>
<td><a th:href="#{/afficher(id=${p.codeDemande})}">Informations sur la demande</a></td>
</tr>
</tbody>
</table>
</div>
<div class="text-danger" th:if="${exception}" th:text="${exception.message}">
</div>
<div class="container col-sm-8">
<ul class="nav nav-pills">
<li th:class="${pageCourante}==${status.index}?'active':''" th:each="pa,status:${pages}" >
<a th:href="#{demande(page=${status.index},size=${size})}" th:text="${status.index}"></a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
Controller :
#RequestMapping(value="/demande")
public String dem(Model model,
#RequestParam(name="page",defaultValue="0")int p,
#RequestParam(name="size",defaultValue="4")int s,
#RequestParam(name="field",defaultValue="4")String type) {
String pr_emp;
Authentication auth = SecurityContextHolder.getContext().getAuthentication();
Long matricule =Long.parseLong(auth.getName());
pr_emp=employeRepository.prenom(matricule);
Page<Demande> PageDemande=demandeRepository.listdemande(matricule,"valide",type,new PageRequest(p,s));
int[] pages = new int[PageDemande.getTotalPages()];
model.addAttribute("pages", pages);
model.addAttribute("size", s);
model.addAttribute("pagecourante", p);
model.addAttribute("prenom", pr_emp);
model.addAttribute("matricule", matricule);
model.addAttribute("listdemandes",PageDemande.getContent());
return "demandes";
}
Repository Query:
#Query("select d from Demande d where d.employe.matricule=:x and d.valide=:isvalide and d.class=:type order by dateDemande")
public Page<Demande> listdemande(#Param("x") Long matricule,
#Param("isvalide") String isvalide,
#Param("type") String type,
Pageable pageable);