Thymeleaf 有没有办法验证 bean 对象属性中的属性?
考虑一下我们确实有一个 Department 类,如下所示:
public class Departement {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Long idDept;
@NotEmpty
private String name;
}
另一个 Employee 类如下
public class Employee{
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Long idEmp;
@NotEmpty
@Size(min = 5, message="At least five characters needed")
private String employeeName;
@NotNull
private Departement departement;
}
通过上面在员工表单中使用 thymeleaf 的代码,由于注释,只有 'employeeName' 才会被 spring 验证。
我们来看看这里
在我的控制器中
@GetMapping( value = "/emp" )
public String save(Model model){
Employee emp = new Employee();
emp.setDepartement(new Departement());
model.addAttribute('employee', emp);
return 'view';
}
//------------- Form in PostMapping
@PostMapping( value = "/save", @Valid Emp emp, BindingResult bindingResult )
public String savePost(Model model){
if( ! bindingResult.hasErrors() )
{
/* Even if departement has not been choosen, my code always goes here
and print "Form Ok. Departement : 0" instead of reaching the 'else' block, but if departement choosen,
it prints the correct value of departemnt
*/
System.out.println( "Form Ok.\n Departement : " + emp.getDepartement().getIdDept() );
}else{
System.out.println( "Missing attributes." );
}
return 'view';
}
这是员工表格
<form th:action="@{save}" th:object="${emp}" th:method="POST" >
<span th:if="${#fields.hasErrors('employeeName') }"th:errors="*{employeeName}"></span>
<input th:field="*{employeeName}" th:value="${employeeName}" />
//--------
<div th:object="${emp.departement}">
<span th:if="${#fields.hasErrors('idDept') }"th:errors="*{idDept}"></span>
<input th:field="*{idDept}" th:value="${idDept}" />
</div>
</form>
**这是我的问题:
如何在员工表单中不使用 javacript 的情况下验证员工部门标识符(idDept 字段)?
**
注意:我不使用 dropdownlist 来显示部门,但更喜欢自动完成字段和采用所选部门 ID 的隐藏字段。