保存创建新子对象的所属实体对象后,发生了奇怪的事情。尽管 SQL 日志还显示子实体的插入,但仅保存所属对象。
团队
@Data
@EqualsAndHashCode(of = "id")
@NoArgsConstructor
@Entity
public class Team implements Comparable<Team> {
@Id
@GeneratedValue
private int id;
private String name;
@Relation(value = Relation.Kind.ONE_TO_MANY, cascade = Relation.Cascade.PERSIST, mappedBy = "team")
private List<TeamPlayer> teamPlayers;
private int givenGoals;
private int gotGoals;
private int points;
@Relation(value = Relation.Kind.MANY_TO_ONE)
private Tournament tournament;
}
TeamPlayer
@Data
@EqualsAndHashCode(of = "id")
@NoArgsConstructor
@Entity
public class TeamPlayer {
@Id
@GeneratedValue
private int id;
@Relation(value = Relation.Kind.MANY_TO_ONE)
private Team team;
@Relation(Relation.Kind.MANY_TO_ONE)
private Player player;
}
玩家
@Data
@EqualsAndHashCode(of = "id")
@NoArgsConstructor
@Entity
public class Player {
@Id
@GeneratedValue
private int id;
private String forename;
private String surname;
private int rank;
@Relation(value = Relation.Kind.ONE_TO_ONE, cascade = Relation.Cascade.ALL)
private User user;
}
团队存储库
@JdbcRepository
public interface TeamRepository extends CrudRepository<Team, Integer> {}
保存集合后
teamRepository.saveAll(teams)
输出是...
17:16:32.160 [pool-1-thread-11] DEBUG io.micronaut.data.query - Executing Batch SQL Insert: INSERT INTO "team" ("name","given_goals","got_goals","points","tournament_id") VALUES (?,?,?,?,?)
17:16:33.308 [pool-1-thread-11] DEBUG io.micronaut.data.query - Executing Batch SQL Insert: INSERT INTO "team_player" ("team_id","player_id") VALUES (?,?)
17:16:33.308 [pool-1-thread-11] DEBUG io.micronaut.data.query - Executing Batch SQL Insert: INSERT INTO "team_player" ("team_id","player_id") VALUES (?,?)
17:16:33.309 [pool-1-thread-11] DEBUG io.micronaut.data.query - Executing Batch SQL Insert: INSERT INTO "team_player" ("team_id","player_id") VALUES (?,?)
17:16:33.309 [pool-1-thread-11] DEBUG io.micronaut.data.query - Executing Batch SQL Insert: INSERT INTO "team_player" ("team_id","player_id") VALUES (?,?)
17:16:33.309 [pool-1-thread-11] DEBUG io.micronaut.data.query - Executing Batch SQL Insert: INSERT INTO "team_player" ("team_id","player_id") VALUES (?,?)
17:16:33.310 [pool-1-thread-11] DEBUG io.micronaut.data.query - Executing Batch SQL Insert: INSERT INTO "team_player" ("team_id","player_id") VALUES (?,?)
但是,仅在数据库中创建了团队,并且不会显示进一步的错误。
有人可以帮我解决这个问题吗?
编辑: 将日志记录更改为跟踪级别后,我可以看到表 team_player 的批量选择的值未绑定(bind)..
14:31:40.928 [pool-1-thread-4] DEBUG io.micronaut.data.query - Executing SQL Insert: INSERT INTO "team" ("name","given_goals","got_goals","points","tournament_id") VALUES (?,?,?,?,?)
14:31:40.928 [pool-1-thread-4] TRACE io.micronaut.data.query - Binding value Team1 to parameter at position: 1
14:31:40.928 [pool-1-thread-4] TRACE io.micronaut.data.query - Binding value 0 to parameter at position: 2
14:31:40.928 [pool-1-thread-4] TRACE io.micronaut.data.query - Binding value 0 to parameter at position: 3
14:31:40.928 [pool-1-thread-4] TRACE io.micronaut.data.query - Binding value 0 to parameter at position: 4
14:31:40.928 [pool-1-thread-4] TRACE io.micronaut.data.query - Binding value 2 to parameter at position: 5
14:31:40.959 [pool-1-thread-4] DEBUG io.micronaut.data.query - Executing Batch SQL Insert: INSERT INTO "team_player" ("team_id","player_id") VALUES (?,?)
14:31:40.991 [pool-1-thread-4] DEBUG io.micronaut.data.query - Executing Query: UPDATE "tournament" SET "status"=? WHERE ("id" = ?)
...
最佳答案
此问题的原因是 ID 被定义为基元而不是对象 Integer。更改为 private Integer id;
后,它可以工作。
关于postgresql - Micronaut Data 的级联持久不保存子对象,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59216990/