hibernate validation not working while one-to-one mapping in between two entities - spring

Question

During form submission, if there is any validation error then form shows the errors messages under the fields. But the actual problem is in another place. I have two entities User and UserDetails. These entities are mapped with each other by bidirectional one-to-one mapping. Validation is working only with the User entity fields but not with the UserDetails entity.
Spring - 5.0.2`
Hibernate - 5.2.10
User.java
#Entity
#Table(name="users")
public class User {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
#NotEmpty(message="{common.error.msg}")
private String first_name;
#NotEmpty(message="{common.error.msg}")
private String last_name;
#NotEmpty(message="{common.error.msg}")
private String status;
#OneToOne(cascade = CascadeType.ALL, mappedBy = "user", fetch = FetchType.LAZY)
private UserDetails userDetails;
//Getter and setter methods
}
UserDetails.java
#Entity
#Table(name="user_details")
public class UserDetails {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int user_id;
#NotEmpty(message="{common.error.msg}")
private String address;
#NotEmpty(message="{common.error.msg}")
private String mobile;
#OneToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "id")
private User user;
//Getter and setter methods
}
Get and Post methods in the controller class
#GetMapping(value="/create")
public String loadUserForm(Model model) {
model.addAttribute("command", new User());
return "backend/oms/user/form"; //JSP
}
#PostMapping(value="/create")
public String Save(#Valid #ModelAttribute("command") User user, BindingResult br, Model model, HttpSession session, RedirectAttributes ra) {
if(br.hasErrors()) {
return "backend/oms/user/form"; //JSP
} else {
try {
int id = userService.save(user);
if(id > 0) {
ra.addFlashAttribute("flash_msg", "ok|User added!");
return "redirect:/oms/user/edit/"+id;
} else {
return "backend/oms/user/create"; //JSP
}
} catch (ConstraintViolationException ex) {
model.addAttribute("err", "Something wrong! Please try again.");
return "backend/oms/user/form"; //JSP
}
}
}
messages.properties
common.error.msg=This field is required!
form.jsp
<form:form action="/oms/user/create" method="post" modelAttribute="command">
<label>First Name</label>
<form:input path="first_name" class="form-control" placeholder="First Name" value="" />
<form:errors cssClass="error" path="first_name" />
<label>Last Name</label>
<form:input path="last_name" class="form-control" placeholder="Last Name" value="" />
<form:errors cssClass="error" path="last_name" />
<label>Mobile</label>
<form:input path="userDetails.mobile" class="form-control" placeholder="Mobile" value="" />
<form:errors cssClass="error" path="userDetails.mobile" />
<label>Address</label>
<form:textarea path="UserDetails.address" class="form-control" placeholder="Address" value="" />
<form:errors cssClass="error" path="userDetails.address" />
<label>Status</label>
<form:select class="form-control" path="status">
<option value="">Choose...</option>
<option value="E">Enable</option>
<option value="D">Disable</option>
</form:select>
<form:errors path="status" cssClass="error"/>
<input type="submit" class="btn btn-primary" value="Save" />
</form>
Please see the screenshot
As you can see the image only fields from the User entity is validating but fields those are from the UserDetails are not validating. Please help.

Answer 1

It is solved now. #Valid annotation solved my problem. I need to put #Valid annotation before the entity variable declaration like below --
#OneToMany(mappedBy="majorHead", cascade = CascadeType.ALL)
#Valid
private List<MinorHead> minorHead = new ArrayList<MinorHead>();