将Spring Boot 2.5.2升级到2.6.3会破坏所有基于投影的JPA查询 [英] Upgrading Spring Boot 2.5.2 to 2.6.3 breaks all projection based JPA queries

问题描述

当我尝试将应用程序的Spring Boot从2.5.2升级到2.6.3时，所有基于投影的JpaRepository查询都无法生成，并显示以下信息：

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Caused by: java.lang.IllegalArgumentException: Failed to create query for method public abstract java.util.Optional com.misc.project.ProjectRepository.getProjectionByIdAndField(java.lang.String,java.lang.String)! null
    at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:96)
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:113)
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:254)
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:87)
    at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:102)
    ... 85 common frames omitted
Caused by: java.lang.NullPointerException: null
    at org.springframework.data.jpa.repository.query.JpaQueryCreator.complete(JpaQueryCreator.java:181)
    at org.springframework.data.jpa.repository.query.JpaQueryCreator.complete(JpaQueryCreator.java:152)
    at org.springframework.data.jpa.repository.query.JpaQueryCreator.complete(JpaQueryCreator.java:59)
    at org.springframework.data.repository.query.parser.AbstractQueryCreator.createQuery(AbstractQueryCreator.java:95)
    at org.springframework.data.repository.query.parser.AbstractQueryCreator.createQuery(AbstractQueryCreator.java:81)
    at org.springframework.data.jpa.repository.query.PartTreeJpaQuery$QueryPreparer.<init>(PartTreeJpaQuery.java:217)
    at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:92)
    ... 89 common frames omitted

方法如下：

Optional<SomeProjection> getProjectionByIdAndField(String id, String field);

投影基于接口，如下所示：

public interface SomeProjection {
  Long getSomething();
}

如果我用@Query手动编写查询，它将移动到下一个投影。有没有什么方法可以解决这个问题，而不必为所有基于投影的JPA方法手动编写查询？

我在此找不到任何提及此问题的内容： https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-2.6-Release-Notes#upgrading-from-spring-boot-25

我发现他们在以下内容中提到了对预测的一些改进： https://github.com/spring-projects/spring-data-commons/wiki/Release-Train-2021.1-%28Q%29-Release-Notes#jdbc.projections

但不涉及破坏旧版本。

推荐答案

这是bug introduced in Spring Data JPA 2.6.1。升级到Spring Boot 2.6.4以获取包含修补程序的Spring Data JPA版本。

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