HTTP Status 500 - Expected session attribute 'consent' - spring-mvc

Question

this is my html form of consents. after posting the inputs i get error on the browser
<form th:object="${consent}" action="../users/userDetails.html" th:action="#{${#httpServletRequest.servletPath}}" method="post">
<fieldset>
<div class="col-sm-7 col-md-6 col-lg-5">
<label for="last_name">Service Provider</label>
<select id="provider" name="provider" class="form-control" th:onchange="'javascript:showPIIDoc(this.value);'">
<option th:value="0" >Select a Service Provider</option>
<option th:each="provider : ${user.providers}" name="name" th:value="${user.id} +','+ ${provider.id}" th:text="${provider.name}" >[name]</option>
</select>
</div>
<div style="clear:both"></div>
<div class="col-sm-7 col-md-6 col-lg-5">
<label for="last_name">PII Document</label>
<select id ="documentdiv" class="form-control">
</select>
</div>
<div style="clear:both"></div>
<div class="col-sm-7 col-md-6 col-lg-5">
<label for="last_name">Share with</label>
<select class="form-control">
<option th:value="0" >Select a user you want share the document to</option>
<option name="name" th:each="user : ${users}" th:value="${user.id}" th:text="${user.firstName} + ' ' + ${user.lastName}">[name]</option>
</select>
</div>
<div style="clear:both"></div>
<div class="col-sm-7 col-md-6 col-lg-5">
<label for="last_name">Consent</label>
<div style="clear:both"></div>
<input type="checkbox" name="share" th:value="1" th:text="Share" />
</div>
<div style="clear:both"></div>
<div style="margin-top:10px;margin-left:10px" class="form-actions">
<button class="btn btn-primary" type="submit">Add Consent</button>
</div>
</fieldset>
</form>
this is my controller
#RequestMapping(value = "/users/{userId}/providers/{providerId}/documents/{documentId}/consents/new", method = RequestMethod.POST)
public String processNewConsentForm(#PathVariable("userId") int userId, #PathVariable("providerId") int providerId,
#PathVariable("documentId") int documentId, #ModelAttribute("consent") Consent consent, BindingResult result, SessionStatus status) {
User user = this.clinicService.findUserById(userId);
Provider provider = this.clinicService.findProviderById(providerId);
System.out.println("daghade");
System.out.println(provider);
Document doc = this.clinicService.findDocumentById(userId);
Consent c =new Consent();
c.setProvider(provider);
c.setDocument(doc);
c.setUser(user);
c.setStatus(c.getStatus());
c.setFriend(c.getFriend());
System.out.println(c);
if (result.hasErrors()) {
return "providers/createOrUpdateConsentForm";
} else {
this.clinicService.saveConsent(c);
status.setComplete();
return "redirect:/users/{userId}";
}
}
I get this error on the browser
HTTP Status 500 - Expected session attribute 'consent'
after submitting the form
This is the code of Controller for GET Method. it used to call the consent form
#RequestMapping(value = "/users/{userId}/providers/{providerId}/documents/{documentId}/consents/new", method = RequestMethod.GET)
public String initNewConsentForm(#PathVariable("userId") int userId,#PathVariable("providerId") int providerId,#PathVariable("documentId") int documentId, Model model) {
User user = this.clinicService.findUserById(userId);
Provider provider = this.clinicService.findProviderById(providerId);
Document document = this.clinicService.findDocumentById(documentId);
Collection<User> users = this.clinicService.AllUsers();
Consent consent = new Consent();
model.addAttribute("provider",provider);
model.addAttribute("document", document);
model.addAttribute("user", user);
model.addAttribute("users", users);
return "providers/createOrUpdateConsentForm";
}

Answer 1

add model.addAttribute("consent", consent); in your GET method.