Java 如何在Jhipster生成的应用程序上从AbstractAuditionEntity扩展实体？

我已经用命令生成了一个实体

yojhipster:entitymyentity

（我正在使用生成器-jhipster@2.19.0)

以及以下选项

{
    "relationships": [],
    "fields": [
        {
            "fieldId": 1,
            "fieldName": "title",
            "fieldType": "String"
        }
    ],
    "changelogDate": "20150826154353",
    "dto": "no",
    "pagination": "no"
}

我已经在liquibase变更日志文件中添加了可审核的列

<changeSet id="20150826154353" author="jhipster">
    <createSequence sequenceName="SEQ_MYENTITY" startValue="1000" incrementBy="1"/>
    <createTable tableName="MYENTITY">
        <column name="id" type="bigint" autoIncrement="${autoIncrement}" defaultValueComputed="SEQ_MYENTITY.NEXTVAL">
            <constraints primaryKey="true" nullable="false"/>
        </column>
        <column name="title" type="varchar(255)"/>

        <!--auditable columns-->
        <column name="created_by" type="varchar(50)">
            <constraints nullable="false"/>
        </column>
        <column name="created_date" type="timestamp" defaultValueDate="${now}">
            <constraints nullable="false"/>
        </column>
        <column name="last_modified_by" type="varchar(50)"/>
        <column name="last_modified_date" type="timestamp"/>
    </createTable>

</changeSet>

然后运行

mvn测试

，得到以下异常

[DEBUG] com.example.web.rest.MyEntityResource - REST request to update MyEntity : MyEntity{id=2, title='UPDATED_TEXT'}

javax.validation.ConstraintViolationException: Validation failed for classes [com.example.domain.MyEntity] during update time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
    ConstraintViolationImpl{interpolatedMessage='may not be null', propertyPath=createdBy, rootBeanClass=class com.example.domain.MyEntity, messageTemplate='{javax.validation.constraints.NotNull.message}'}
]
    at org.hibernate.cfg.beanvalidation.BeanValidationEventListener.validate(BeanValidationEventListener.java:160)
    at org.hibernate.cfg.beanvalidation.BeanValidationEventListener.onPreUpdate(BeanValidationEventListener.java:103)
    at org.hibernate.action.internal.EntityUpdateAction.preUpdate(EntityUpdateAction.java:257)
    at org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:134)
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:463)
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:349)
    at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:350)
    at org.hibernate.event.internal.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:67)
    at org.hibernate.internal.SessionImpl.autoFlushIfRequired(SessionImpl.java:1191)
    at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1257)
    at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103)
    at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:573)
    at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:449)
    at org.hibernate.jpa.criteria.compile.CriteriaQueryTypeQueryAdapter.getResultList(CriteriaQueryTypeQueryAdapter.java:67)
    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.findAll(SimpleJpaRepository.java:318)

这是一个失败的测试

@Test
    @Transactional
    public void updateMyEntity() throws Exception {
        // Initialize the database
        myEntityRepository.saveAndFlush(myEntity);

        int databaseSizeBeforeUpdate = myEntityRepository.findAll().size();

        // Update the myEntity
        myEntity.setTitle(UPDATED_TITLE);


        restMyEntityMockMvc.perform(put("/api/myEntitys")
                .contentType(TestUtil.APPLICATION_JSON_UTF8)
                .content(TestUtil.convertObjectToJsonBytes(myEntity)))
                .andExpect(status().isOk());

        // Validate the MyEntity in the database
        List<MyEntity> myEntitys = myEntityRepository.findAll();
        assertThat(myEntitys).hasSize(databaseSizeBeforeUpdate);
        MyEntity testMyEntity = myEntitys.get(myEntitys.size() - 1);
        assertThat(testMyEntity.getTitle()).isEqualTo(UPDATED_TITLE);
    }

---

如何使实体可审核并通过测试？

问题是传输（序列化）的对象不包含可审核的属性（由于@JsonIgnore注释），这与@NotNull注释相结合会产生ConstraintViolation

1.-一种解决方案是首先检索要更新的对象，然后只更新需要更新的字段。因此，在我们的示例中，我们需要修改MyEntityResource类的更新方法，如下所示：

/**
 * PUT  /myEntitys -> Updates an existing myEntity.
 */
@RequestMapping(value = "/myEntitys",
    method = RequestMethod.PUT,
    produces = MediaType.APPLICATION_JSON_VALUE)
@Timed
public ResponseEntity<MyEntity> update(@RequestBody MyEntity myEntityReceived) throws URISyntaxException {
    log.debug("REST request to update MyEntity : {}", myEntityReceived);
    if (myEntityReceived.getId() == null) {
        return create(myEntityReceived);
    }
    MyEntity myEntity = myEntityRepository.findOne(myEntityReceived.getId());
    myEntity.setTitle(myEntityReceived.getTitle());
    MyEntity result = myEntityRepository.save(myEntity);
    return ResponseEntity.ok()
            .headers(HeaderUtil.createEntityUpdateAlert("myEntity", myEntity.getId().toString()))
            .body(result);
}

因此，在更新实体时，请求将包含以前生成的值

{
"createdBy":"admin",
"createdDate":"2015-08-27T17:40:20Z",
"lastModifiedBy":"admin",
"lastModifiedDate":"2015-08-27T17:40:20Z",
"id":1,
"title":"New Entity Updated"
}

与更新响应类似，但是更新了lastModified字段

{
"createdBy":"admin",
"createdDate":"2015-08-27T17:40:20Z",
"lastModifiedBy":"admin",
"lastModifiedDate":"2015-08-27T17:45:12Z",
"id":1,
"title":"New Entity Updated"
}

两种解决方案都有各自的优缺点，因此请选择最适合您的解决方案。

---

此外，您应该在generator jhipster上签出它，尽管它的标题仅为DTO实体，但无论您是否使用它们，问题都是一样的。

正如我在与jhipster相关的一些问题上所发现的（现在找不到该页面，我将参考它），最好和最简单的解决方案（在我看来）是这个包

它包含您需要的所有内容，还可以更改更改日志文件并在数据库中生成列：

创建人

，

创建日期

，

上次修改人

和

上次修改日期

---

致以最诚挚的问候

我已经检查了这个问题，但问题有点不同。同时，我添加了一个解决方法，只需在restMyEntityMockMvc.perform之后将createdBy属性设置为“system”

/**
 * PUT  /myEntitys -> Updates an existing myEntity.
 */
@RequestMapping(value = "/myEntitys",
    method = RequestMethod.PUT,
    produces = MediaType.APPLICATION_JSON_VALUE)
@Timed
public ResponseEntity<MyEntity> update(@RequestBody MyEntity myEntityReceived) throws URISyntaxException {
    log.debug("REST request to update MyEntity : {}", myEntityReceived);
    if (myEntityReceived.getId() == null) {
        return create(myEntityReceived);
    }
    MyEntity myEntity = myEntityRepository.findOne(myEntityReceived.getId());
    myEntity.setTitle(myEntityReceived.getTitle());
    MyEntity result = myEntityRepository.save(myEntity);
    return ResponseEntity.ok()
            .headers(HeaderUtil.createEntityUpdateAlert("myEntity", myEntity.getId().toString()))
            .body(result);
}

{
"createdBy":"admin",
"createdDate":"2015-08-27T17:40:20Z",
"lastModifiedBy":"admin",
"lastModifiedDate":"2015-08-27T17:40:20Z",
"id":1,
"title":"New Entity"
}

{
"createdBy":"admin",
"createdDate":"2015-08-27T17:40:20Z",
"lastModifiedBy":"admin",
"lastModifiedDate":"2015-08-27T17:40:20Z",
"id":1,
"title":"New Entity Updated"
}

{
"createdBy":"admin",
"createdDate":"2015-08-27T17:40:20Z",
"lastModifiedBy":"admin",
"lastModifiedDate":"2015-08-27T17:45:12Z",
"id":1,
"title":"New Entity Updated"
}