Springboot spring data JPA 使用连接和分页

Question

Java：20.0

Springboot：3.0.1

表结构

posts | CREATE TABLE `posts` (
  `id` binary(16) NOT NULL,
  `posts` varchar(5000) DEFAULT NULL,
  `created_at` datetime(6) DEFAULT NULL,
  `updated_at` datetime(6) DEFAULT NULL,
  `user_id` binary(16) DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `FK8omq0tc18jd43bu5tjh6jvra7taq` (`user_id`),
  CONSTRAINT `FK8omq0tc18jd43bu5tjh6jvra7taq` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci |

post_reports

post_reports | CREATE TABLE `post_reports` (
  `id` binary(16) NOT NULL,
  `reported_at` datetime(6) DEFAULT NULL,
  `reported_by` varchar(255) DEFAULT NULL,
  `reported_reason` varchar(255) DEFAULT NULL,
  `updated_at` datetime(6) DEFAULT NULL,
  `updated_by` varchar(255) DEFAULT NULL,
  `post_id` binary(16) DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `FKj9so403o1bquehozscdqxpyijjma` (`post_id`),
  CONSTRAINT `FKj9so403o1bquehozscdqxpyijjma` FOREIGN KEY (`post_id`) REFERENCES `posts` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci |

查询

@Query(
      value =
          "SELECT DISTINCT p.* FROM posts AS p LEFT JOIN post_reports AS pr ON p.id=pr.post_id WHERE (pr.reported_by IS NULL OR pr.reported_by!=:reportedBy) order by p.created_at",
      countQuery =
          "SELECT COUNT(DISTINCT p.*) FROM posts AS p LEFT JOIN FETCH post_reports AS pr ON p.id= pr.post_id WHERE (pr.reported_by IS NULL OR pr.reported_by!=:reportedBy)",
      nativeQuery = true)
  Page<Post> findAllByStatusTrueAndReportedByNullOrReportedByNot(
      @Param("reportedBy") String reportedBy, Pageable pageable);

*这会产生未知字段

p.createdAt.*

错误。因为在表中名称是

created_at

它无法识别该列。

Answer 1

请分享您的实体类以获得更好的答案。

您需要设置以下任意一项

1. 设置命名策略
2. 在注释中使用小写列名称

作为以下示例中显示的属性或通过创建自定义策略。

 spring:
  jpa:
    hibernate:
      naming.physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl