empty object in controller from thymeleaf form - model-view-controller

Question

I have a table showing testResults using thymeleaf template -
<tr th:each="testResult,iterationStatus : ${testResults}">
<td th:text="${iterationStatus.count}">1</td>
<td th:text="${testResult.name}">DOMAIN</td>
<td th:text="${testResult.length}">PROCESS</td>
<td>
<form ACTION="#" th:action="#{/deleteName}" th:object="${testResult}" method="POST">
<input type="hidden" th:field="*{name}"/>
<input type="hidden" th:field="*{length}"/>
<button type="submit">submit</button>
</form>
</td>
</tr>
name and length are showing fine in the html, but when i submit the form, controller gets name and length as empty values.
What i am doing wrong in assigning the values....
below is controller method that gets invoked -
#RequestMapping(method= RequestMethod.POST, value = "/deleteName")
public String deleteName(#Valid #ModelAttribute("testResult") TestResult testResult, BindingResult bindingResult, Model model, HttpServletRequest request) {
System.out.println(testResult.toString());
return "/";
}
output once i submit the form -
TestResult [name=, length=, xyz=null]

Answer 1

I couldn't get th:field to work inside a th:object, like you're doing here. However, if I stop using th:field, and use th:value instead, the form submits successfully.
<tr th:each="testResult : ${testResults}">
<td th:text="${testResult.name}">DOMAIN</td>
<td th:text="${testResult.length}">PROCESS</td>
<td>
<form ACTION="#" th:action="#{/deleteName}" method="POST">
<input type="hidden" name="name" th:value="${testResult.name}"/>
<input type="hidden" name="length" th:value="${testResult.length}"/>
<button type="submit">submit</button>
</form>
</td>
</tr>