不支持具有 JPA 更新查询的 DML 操作

java hibernate spring-mvc jpa hql

2022-08-31 16:51:57

以前有人问过一次，但解决方案没有解决问题。我正在创建一个JUnit测试：

 @Test
    @Transactional
    @Modifying
    public void updateMaterialInventory() throws Exception{

        // Initialize the database
        materialRepository.saveAndFlush(material);

        long id =  material.getId();
        materialRepository.updateMaterialInventory(id,UPDATED_INVENTORY_COUNT);

        assertEquals(material.getInventory_count(), UPDATED_INVENTORY_COUNT, 0);
    }

上述测试调用的查询为：

 @Query("UPDATE Material m SET m.inventory_count = ?2 WHERE m.id = ?1")
    void updateMaterialInventory(Long id,int newInventoryAmount);

错误：

Caused by: org.hibernate.hql.internal.QueryExecutionRequestException: Not supported for DML operations [UPDATE com.htd.domain.Material m SET m.inventory_count = ?2 WHERE m.id = ?1]
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.errorIfDML(QueryTranslatorImpl.java:318)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:369)
    at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:231)
    at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1264)
    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.getSingleResult(QueryImpl.java:495)
    ... 55 more

答案 1

注释必须放在方法上，一起放在注释上，让Spring-data知道查询不是用于选择值的查询，而是用于更新值的查询。@ModifyingupdateMaterialInventory@Query

答案 2

据我所知，您不应该在存储库类中使用注释。找到下面的答案。@Transactional

服务进口类

import org.springframework.transaction.annotation.Transactional;
...
@Test
@Transactional
public void updateMaterialInventory() throws Exception{

    // Initialize the database
    materialRepository.saveAndFlush(material);

    long id =  material.getId();
    materialRepository.updateMaterialInventory(id,UPDATED_INVENTORY_COUNT);

    assertEquals(material.getInventory_count(), UPDATED_INVENTORY_COUNT, 0);
}

存储库类

import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;
...

  @Modifying
  @Query("UPDATE Material m SET m.inventory_count = ?2 WHERE m.id = ?1")
  void updateMaterialInventory(Long id,int newInventoryAmount);

确保使用正确的导入。希望这是有帮助的。