Question

我目前使用Hibernate作为ORM开发Spring应用程序。我知道只要实体被持久化或加载，Hibernate默认使用JSR-303 Bean Validation。由于此应用程序支持草稿（我希望在持久化后执行验证），我不得不将其添加到persistence.xml：

<validation-mode>NONE</validation-mode>

for hibernate不执行这些验证。问题是，当我尝试在实体上手动执行bean验证时（当草稿成为文档时），hibernate尚未加载的元素（验证时PersistentBag的实例）未经验证，这里是代码示例

控制器方法代码：

@RequestMapping(value = "/entity/{entity_id}", method = RequestMethod.POST)
public String completeEntity(@PathVariable("entity_id") Long entity_id)
{
    //myEntityService was autowired in the controller
    MyEntity myEntity = myEntityService.findById(entity_id);
    //Here comes the bean validation
    DataBinder binder = new DataBinder(myEntity);
    //validator was also autowired
    binder.setValidator(validator);
    binder.validate();
    BindingResult result = binder.getBindingResult();
    if (result.hasErrors()) {
        //handleErrors
    }
    //continue doing stuff, marking the entity as 'not draft' and persisting it...
}

模型实体代码：

@Entity
@Table(name = "myEntity")
public class MyEntity{
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotBlank 
    String foo;

    // bi-directional one-to-many association to Bar
    //Note the valid annotation, as i want all related Bar's to be validated
    //when a MyEntity is validated
    @Valid
    @OneToMany(mappedBy = "myEntity")
    private List<Bar> bars;

    //Getters and Setters...
}

@Entity
@Table(name = "bar")
public class Bar{
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotBlank 
    String barFoo;

    // bi-directional many-to-one association to MyEntity
    @ManyToOne
    private MyEntity myEntity;

    //Getters and Setters...
}

我想知道如何传播bean验证，以便每当验证MyEntity实例时，所有关联的Bar都会得到验证，而不必在验证之前强制加载这些实体。 / p>

Answer 1

您可以实现自定义traversable resolver并配置Bean验证以使用此验证。

默认实现确保没有从数据库加载任何对象（假设它们在上次写入时已成功验证），但您可以根据您的要求覆盖特定关联。

Spring，JSR 303验证和Hibernate

1 个答案: