how to update an existed data using spingboot and thymeleaf? - spring-boot

Question

Using Kotlin.
I'm trying to update a User object by:
send old user to update page;
#GetMapping("/update/{id}")
fun updateUser(#PathVariable(value = "id") id: Int, model: Model): String {
val user = userService.findUserByUid(id)
model.addAttribute("user", user)
if (user.uid != 1)
model.addAttribute("allRoles", userService.addUserRole())
else
model.addAttribute("allRoles", userService.adminRole())
return "updateUser"
}
change some vars of that user in html page;
<form action="#" th:action="#{/userManagement/update}" th:object="${user}" method="POST">
<label>昵称</label>
<input type ="text" th:field = "*{usernickname}" placeholder="usernickname" class="form-control mb-4 col-4">
<br>
<label>密码</label>
<input type ="password" th:field = "*{password}" placeholder="password" class="form-control mb-4 col-4">
<div>
<label>职位:
<input type="radio" name="roles"
th:each="myRole : ${allRoles}"
th:text="${myRole.name()}"
th:value="${myRole}"
th:field="*{usertype}"
th:attr ="checked=${myRole.ordinal()==0?true:false}"
/>
</label>
</div>
<br>
<button type="submit" class="btn btn-update">更新员工</button>
</form>
update user data.
#PostMapping(path = ["/update"])
fun updateEmployee(#ModelAttribute("user") user: User, model: Model): String {
try {
user.password = passwordConfig.passwordEncoder().encode(user.password)
userService.updateUser(user)
} catch (ex: RuntimeException) {
model.addAttribute("error", ex.message)
if (user.uid != 1)
model.addAttribute("allRoles", userService.addUserRole())
else
model.addAttribute("allRoles", userService.adminRole())
return "updateUser"
}
return "redirect:/userManagement/"
}
The problem is, at phase 3, the user object i recieved have only usernickname, password and role, other vars becomes null.
For example, at phase 1, the user object is like{uid=5,username=aaa,usernickname=bbb,password=****,usertype=MANAGER,usergroup=DEFAULT,bugList={}}
and when i changed nickname and password at updateUser page, then push that commit btn, the user object at phase 3 will be{uid=0,username=null,usernickname=ccc,password=*****,usertype=MANAGER,usergroup=null,bugList=null}
it seems like phase 1 didnot run correctly, the user object i want to transmit didnot transmited.
I think it is caused by wrong syntax, but i cannot find how to solve it.
update:
User entity:
#Entity
class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
var uid = 0
lateinit var password: String
lateinit var username: String
lateinit var usernickname: String
lateinit var usertype: UserRole
#ManyToOne(fetch= FetchType.EAGER, optional = true)
#JoinColumn(name="groupid")
lateinit var usergroup: UserGroup
#OneToMany(mappedBy = "bid")
lateinit var bugList: List<Bug>
constructor(
password: String,
username: String,
usernickname: String,
usertype: UserRole,
usergroup: UserGroup
) {
this.password = password
this.username = username
this.usernickname = usernickname
this.usertype = usertype
this.usergroup = usergroup
}
constructor()
}
UserRole:
enum class UserRole {
ADMIN, PROGRAMMER, TESTER, MANAGER;
val roleAuthority: GrantedAuthority
get() = SimpleGrantedAuthority("ROLE_$name")
}