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spring data jpa @Query注解中delete語(yǔ)句報(bào)錯(cuò)的解決

 更新時(shí)間:2021年12月08日 09:29:20   作者:豬豬豬豬豬鴨  
這篇文章主要介紹了spring data jpa @Query注解中delete語(yǔ)句報(bào)錯(cuò)的解決,具有很好的參考價(jià)值,希望對(duì)大家有所幫助。如有錯(cuò)誤或未考慮完全的地方,望不吝賜教

spring data jpa @Query注解中delete語(yǔ)句報(bào)錯(cuò)

項(xiàng)目中需要?jiǎng)h除掉表中的一些數(shù)據(jù)

@Query("delete from EngineerServices es where es.engineerId = ?1")
int deleteByEgId(String engineerId);

但是提示了錯(cuò)誤

org.hibernate.hql.QueryExecutionRequestException: Not supported for DML operations

通過(guò)查閱相關(guān)的資料發(fā)現(xiàn),對(duì)于執(zhí)行update和delete語(yǔ)句需要添加@Modifying注解

@Modifying
@Query("delete from EngineerServices es where es.engineerId = ?1")
int deleteByEgId(String engineerId);

不過(guò),添加之后運(yùn)行又出現(xiàn)了另一個(gè)錯(cuò)誤

nested exception is javax.persistence.TransactionRequiredException: Executing an update/delete query

發(fā)現(xiàn)缺少Transaction,于是添加@Transactional

@Modifying
@Transactional
@Query("delete from EngineerServices es where es.engineerId = ?1")
int deleteByEgId(String engineerId);

到此,這條delete語(yǔ)句終于可以成功的執(zhí)行了。

代碼示例:

package com.easy.kotlin.chapter11_kotlin_springboot.dao 
import com.easy.kotlin.chapter11_kotlin_springboot.entity.Image
import org.springframework.data.domain.Page
import org.springframework.data.domain.Pageable
import org.springframework.data.jpa.repository.Modifying
import org.springframework.data.jpa.repository.Query
import org.springframework.data.repository.PagingAndSortingRepository
import org.springframework.data.repository.query.Param
import org.springframework.transaction.annotation.Transactional
 
/** Created by jack on 2017/7/17.
@Query注解里面的value和nativeQuery=true,意思是使用原生的sql查詢語(yǔ)句.
sql模糊查詢like語(yǔ)法,我們?cè)趯?xiě)sql的時(shí)候是這樣寫(xiě)的
like '%?%'
但是在@Query的value字符串中, 這樣寫(xiě)
like %?1%
另外,要注意的是: 對(duì)于執(zhí)行update和delete語(yǔ)句需要添加@Modifying注解
 */
 
interface ImageRepository : PagingAndSortingRepository<Image, Long> {
    @Query("SELECT a from #{#entityName} a where a.isDeleted=0 and a.category like %?1%")
    fun findByCategory(category: String): MutableList<Image>
 
    @Query("select count(*) from #{#entityName} a where a.isDeleted=0 and a.url = ?1")
    fun countByUrl(url: String): Int
 
    @Query("SELECT a from #{#entityName} a where a.isDeleted=0 and a.category like %:searchText%")
    fun search(@Param("searchText") searchText: String, pageable: Pageable): Page<Image>
 
    @Query("SELECT a from #{#entityName} a where a.isDeleted=0 and a.isFavorite=1")
    fun findAllFavorite(pageable: Pageable): Page<Image>
 
    @Query("SELECT a from #{#entityName} a where a.isDeleted=0 and a.isFavorite=1 and a.category like %:searchText%")
    fun searchFavorite(@Param("searchText") searchText: String, pageable: Pageable): Page<Image>
 
    @Modifying
    @Transactional
    @Query("update #{#entityName} a set a.isFavorite=1 where a.id=?1")
    fun addFavorite(id: Long)
 
    @Modifying
    @Transactional
    @Query("delete from #{#entityName} a where a.id=?1")
    fun delete(id: Long) 
} 
 

JPA使用@Query注解實(shí)例

1. 一個(gè)使用@Query注解的簡(jiǎn)單例子

@Query(value = "select name,author,price from Book b where b.price>?1 and b.price<?2")
List<Book> findByPriceRange(long price1, long price2);

2. Like表達(dá)式

@Query(value = "select name,author,price from Book b where b.name like %:name%")
List<Book> findByNameMatch(@Param("name") String name);

3. 使用Native SQL Query

所謂本地查詢,就是使用原生的sql語(yǔ)句(根據(jù)數(shù)據(jù)庫(kù)的不同,在sql的語(yǔ)法或結(jié)構(gòu)方面可能有所區(qū)別)進(jìn)行查詢數(shù)據(jù)庫(kù)的操作。

@Query(value = "select * from book b where b.name=?1", nativeQuery = true)
List<Book> findByName(String name);

4. 使用@Param注解注入?yún)?shù)

@Query(value = "select name,author,price from Book b where b.name = :name AND b.author=:author AND b.price=:price")
List<Book> findByNamedParam(@Param("name") String name, @Param("author") String author,
        @Param("price") long price);

5. SPEL表達(dá)式(使用時(shí)請(qǐng)參考最后的補(bǔ)充說(shuō)明)

'#{#entityName}'值為'Book'對(duì)象對(duì)應(yīng)的數(shù)據(jù)表名稱(book)。

public interface BookQueryRepositoryExample extends Repository<Book, Long>{
    @Query(value = "select * from #{#entityName} b where b.name=?1", nativeQuery = true)
    List<Book> findByName(String name);
}

6. 一個(gè)較完整的例子

public interface BookQueryRepositoryExample extends Repository<Book, Long> {
    @Query(value = "select * from Book b where b.name=?1", nativeQuery = true) 
    List<Book> findByName(String name);// 此方法sql將會(huì)報(bào)錯(cuò)(java.lang.IllegalArgumentException),看出原因了嗎,若沒(méi)看出來(lái),請(qǐng)看下一個(gè)例子
 
    @Query(value = "select name,author,price from Book b where b.price>?1 and b.price<?2")
    List<Book> findByPriceRange(long price1, long price2);
 
    @Query(value = "select name,author,price from Book b where b.name like %:name%")
    List<Book> findByNameMatch(@Param("name") String name);
 
    @Query(value = "select name,author,price from Book b where b.name = :name AND b.author=:author AND b.price=:price")
    List<Book> findByNamedParam(@Param("name") String name, @Param("author") String author,
            @Param("price") long price); 
}

7. S模糊查詢注意問(wèn)題

模糊查詢時(shí)在原生sql中l(wèi)ike后跟隨的值需要單獨(dú)傳,%不支持單獨(dú)出現(xiàn);在使用length查詢數(shù)據(jù)庫(kù)時(shí)需要()單獨(dú)括起。

@Repository
public interface SaleschargeRespolity extends JpaRepository<Salescharge,Integer> { 
    @Query(value = "select p from Salescharge p where ordertime>:startTime and ordertime<:endTime and staffid like :staffidlike and length(staffid)=(length(:staffid)+2)")    
    List<Salescharge> finAllSubChargeInfo(@Param("startTime") Date startTime, @Param("endTime") Date endTime,@Param("staffid") String staffid, @Param("staffidlike") String staffidlike); 
}

8. 解釋例6中錯(cuò)誤的原因

因?yàn)橹付薾ativeQuery = true,即使用原生的sql語(yǔ)句查詢。使用java對(duì)象'Book'作為表名來(lái)查自然是不對(duì)的。只需將Book替換為表名book。

@Query(value = "select * from book b where b.name=?1", nativeQuery = true)
List<Book> findByName(String name);

以上為個(gè)人經(jīng)驗(yàn),希望能給大家一個(gè)參考,也希望大家多多支持腳本之家。

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