Question

对于以下查询：

@Query("SELECT fd FROM DPPFile fd WHERE fd.ID= ':ID'")
List<DPPFile> findByID(@Param("ID")String ID/);

我遇到了以下奇怪的例外：

Caused by: java.lang.IllegalArgumentException: Parameter with that position [1] did not exist
    at org.hibernate.jpa.spi.BaseQueryImpl.findParameterRegistration(BaseQueryImpl.java:502)
    at org.hibernate.jpa.spi.BaseQueryImpl.setParameter(BaseQueryImpl.java:692)
    at org.hibernate.jpa.spi.AbstractQueryImpl.setParameter(AbstractQueryImpl.java:181)
    at org.hibernate.jpa.spi.AbstractQueryImpl.setParameter(AbstractQueryImpl.java:32)
    at org.springframework.data.jpa.repository.query.ParameterBinder.bind(ParameterBinder.java:140)
    at org.springframework.data.jpa.repository.query.StringQueryParameterBinder.bind(StringQueryParameterBinder.java:61)
    at org.springframework.data.jpa.repository.query.ParameterBinder.bind(ParameterBinder.java:100)
    at org.springframework.data.jpa.repository.query.SpelExpressionStringQueryParameterBinder.bind(SpelExpressionStringQueryParameterBinder.java:69)
    at org.springframework.data.jpa.repository.query.ParameterBinder.bindAndPrepare(ParameterBinder.java:160)
    at org.springframework.data.jpa.repository.query.ParameterBinder.bindAndPrepare(ParameterBinder.java:151)
    at org.springframework.data.jpa.repository.query.AbstractStringBasedJpaQuery.doCreateQuery(AbstractStringBasedJpaQuery.java:81)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.createQuery(AbstractJpaQuery.java:190)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution$CollectionExecution.doExecute(JpaQueryExecution.java:121)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:85)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:116)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:106)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:483)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:461)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)

如果我使用？1而不是命名参数方法，我会期待这个异常。使用？1也失败了，所以我不确定这里出了什么问题。 DPPFile类有一个名为ID的成员以及getter / setter。

（我之所以没有使用默认的“findByID”而没有查询功能的原因是因为我想用其他参数扩展查询）

Answer 1

不要将参数放在单引号中，否则将其解析为文字。因此，查询将不会被注册。

Answer 2

作为替代解决方案，您可以使用spring-data @Query跳过整个findOne注释，假设ID是您实体中的唯一标识符。否则，您可以依赖spring-data从方法名称生成查询。使用这样的东西：

@Entity
public class DPPFile {

  @Id
  private Integer identifier;

  private Integer ID;
}

public interface DPPFileRepository extends Repository< DPPFile, Integer> {

   List<DPPFile> findByID(String ID);
}

请参阅https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#repositories.query-methods.query-creation

JPA存储库中的自定义SQL查询

2 个答案: