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Загружаю существующий объект пользователя как @ModelAttribute в форму Spring (и он правильно отображает соответствующий идентификатор и имя), но когда я изменяю имя и пытаюсь прочитать его обратно на submit, я получаю нуль ID в processEditSubmit (имя правильно изменено).Spring MVC @ModelAttribute zero ID из формы
User.java
@Entity
@Table(name = "\"user\"")
public class User {
@Id
// @GeneratedValue(strategy = GenerationType.IDENTITY)
@Column
private int id;
@Column
private String name;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
EditUser.jsp
<table>
<form:form modelAttribute="userCmd" action="update" method="post" >
<tr><td>ID:</td><td><form:input disabled="true" path="id" /></td><td><form:errors path="id" cssClass="error"/></td></tr>
<tr><td>Name:</td><td><form:input path="name"/></td><td><form:errors path="name" cssClass="error"/></td></tr>
<tr><td colspan="3"><input type="submit" value="Save"/></td></tr>
</form:form>
</table>
ManageUsers.java
@Controller
@RequestMapping("/users")
public class ManageUsers {
@Autowired
private UserValidator userValidator;
@Autowired
private UserManager userManager;
@InitBinder
private void initBinder(WebDataBinder binder) {
// binder.setValidator(userValidator);
// binder.registerCustomEditor(User.class, new UserEditor());
}
@RequestMapping(method = RequestMethod.GET)
public String viewUsers(ModelMap model) {
UserList ul = new UserList();
List<User> users = userManager.getUsers();
ul.setUserList(users);
model.addAttribute("userListCmd", ul);
return "manageUsers";
}
@RequestMapping(value = "/edit", method = RequestMethod.GET)
public String editUser(@RequestParam int id, ModelMap model) {
model.addAttribute("userCmd", userManager.getUserById(id));
return "editUser";
}
@RequestMapping(value = "/add", method = RequestMethod.GET)
public String addUser(ModelMap model) {
model.addAttribute("userCmd", new User());
return "addUser";
}
@RequestMapping(value = "/add", method = RequestMethod.POST)
public String processAddSubmit(@ModelAttribute("userCmd") User user,
BindingResult result, SessionStatus status,
HttpServletResponse response) throws IOException {
userValidator.validate(user, result);
if (result.hasErrors())
return "addUser";
userManager.insertUser(user);
status.setComplete();
return "redirect:/users";
}
@RequestMapping(value = "/update", method = RequestMethod.POST)
public String processEditSubmit(@ModelAttribute("userCmd") User user,
BindingResult result, SessionStatus status,
HttpServletResponse response) throws IOException {
userValidator.validate(user, result);
if (result.hasErrors())
return "editUser";
// user contains zero ID and operation fails with org.hibernate.StaleStateException:
// Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
userManager.updateUser(user);
status.setComplete();
return "redirect:/users";
}
@RequestMapping(value = "/delete/{id}", method = RequestMethod.POST)
public String processDelete(@PathVariable int id,
HttpServletResponse response) throws IOException {
userManager.deleteUser(id);
return "redirect:/users";
}
}