pass object from HTML template back to the controller - spring

Question

I have the following HTML block. I want to pass the object "jobDTO" back to the contoller "/deleteJob" method. Whatever I do I am getting null object.
<th:block th:if="${jobDTO != null}" th:each="jobDTO: ${allJobDTOs.get(jobGroup)}">
<div id="accordion2" style="margin-bottom: 3px;">
<div class="card" id="headingOne">
<div class="card-header" style="padding: 0">
<h5 class="mb-0">
<button class="btn btn-link" data-toggle="collapse" th:attr="data-target='#accordion2_'+${jobDTO.identity.name}"
aria-expanded="true" aria-controls="collapseChild" >
<p class="font-weight-bold custom-p identity-black" > Job Identity </p>
<p class="custom-p" style="padding-left: 52px;" th:text="${jobDTO.identity.group} +' , ' + ${jobDTO.identity.name}"></p>
</button>
</h5>
</div>
<div th:id="'accordion2_'+${jobDTO.identity.name}" class="collapse" aria-labelledby="headingOne" data-parent="#accordion2">
<div class="card-body">
<dl class="row">
<dt class="col-lg-3">Trigger List</dt>
<dd class="col-sm-9">
<th:block th:each="trigger: ${jobDTO.triggers}">
<p><b>nextFireTime</b> <span th:text="${trigger.nextFireTime}"> </span></p>
<hr>
</th:block>
</dd>
</dl>
<!-- important part.. how to pass the jobDTO object back to the controller -->
<form id="form2" action="#" th:action="#{/deleteJob}" th:object="${jobDTO}" th:method="post">
<input type="text" th:value="*{identity.name}" th:field="*{identity.name}" hidden/>
<button type="submit" value="Submit" class="btn btn-danger btn-sm" >Delete Job</button>
</form>
</div>
</div>
</div>
</div>
</th:block>
my controller relevant parts are:
#GetMapping(value = "/deleteJob")
public String deleteJobPage(Model model) {
model.addAttribute("jobDTO", new ScheduleJobDTO());
//Returns the Home page with the prepared model attributes
return "Home";
}
// =================
#PostMapping("/deleteJob")
public String deleteJob(#ModelAttribute final ScheduleJobDTO jobDTOReturn, BindingResult bindingResult, Model model) {
// I want to receive the jobDTO object here
schedulerService.deleteJobFromGroup(jobDTOReturn.getIdentity().getGroup(),
jobDTOReturn.getIdentity().getName());
return "redirect:/";
}
what I am missing here?

Answer 1

I think there is an error in your input tag, try this :
<input type="text" th:value="${jobDTO.identity.name}" th:field="*{identity.name}" hidden/>