org.hibernate.hql.internal.ast.QuerySyntaxException: XXX is not mapped

异常情况:

最近在把一个项目拆分多个 module 的时候数据库查询遇到这个异常:org.hibernate.hql.internal.ast.QuerySyntaxException: Identification is not mapped

JPA 查询方法如下:

public Identification findIdentificationByWxId(String wxId) {
        JPAQueryBase query = new JPAQuery(entityManager).from(qIdentification);
        query.where(qIdentification.wxId.eq(wxId));
        return (Identification) query.fetchOne();
    }

  

异常信息如下:

{
  "timestamp": 1548844710242,
  "status": 500,
  "error": "Internal Server Error",
  "exception": "org.springframework.dao.InvalidDataAccessApiUsageException",
  "message": "org.hibernate.hql.internal.ast.QuerySyntaxException: Identification is not mapped [select identification\nfrom Identification identification\nwhere identification.wxId = ?1];
   nested exception is java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: Identification is not mapped [select identification\nfrom Identification identification\nwhere identification.wxId = ?1]",
  "path": "/user/getUserInfo"
}

  

解决方法:

在springboot 启动类上加上如下注解便可:
@EntityScan(basePackages = ("cn.xxx.*"))
当一个项目拆分成多个 module 的时候,由于 应用层和实体层已经隔离,所以在应用层启动应用的时候需要扫描 实体。当然如果应用层需要其他 module 中的配置类的话,也是需要添加扫描配置,扫描到其他 module 中的配置类。如:
@SpringBootApplication(scanBasePackages ="cn.xxx.*")

  

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