JPA更改不会持久存在数据库中

Question

我对Spring很陌生，我试图构建一个休息API。

我的目的是创建一个小问答游戏。

游戏由Rounds（1：n）组成。

在回合中，我有设置用户响应的字段。

这是我RoundRepository类：

import org.springframework.data.jpa.repository.JpaRepository; 
import org.springframework.data.jpa.repository.Modifying; 
import org.springframework.data.jpa.repository.Query; 
import org.utouch.nymeria.quizzServer.models.Round; 

public interface RoundRepository extends JpaRepository<Round, Long> { 

    @Modifying 
    @Query("update Round r set r.reply_player = ?1 where r.id = ?2") 
    @Transactional 
    void addPlayerReply(int reply_number, Long roundID); 

    @Modifying 
    @Query("update Round r set r.reply_opponent = ?1 where r.id = ?2") 
    @Transactional 
    void addOpponentReply(int reply_number, Long roundID); 
} 

GameRepository.java：

import java.util.List; 
import org.springframework.data.jpa.repository.JpaRepository; 
import org.utouch.nymeria.quizzServer.models.Game; 
import org.utouch.nymeria.quizzServer.models.User; 

public interface GameRepository extends JpaRepository<Game, Long> { 
    List<Game> findByPlayer(User player); 
} 

Game.java：

@Entity 
public class Game implements Serializable { 

    private static final long serialVersionUID = 2L; 

    @Id 
    @GeneratedValue 
    private Long id; 

    @ManyToOne 
    private User player; 

    @ManyToOne 
    private User opponent; 

    private int player_score=0; 
    private int opponent_score=0; 

    private Boolean ended; 

    @Temporal(TemporalType.TIMESTAMP) 
    private Date startDate = new Date(); 

    @OneToMany(targetEntity=Round.class, 
       fetch=FetchType.EAGER, cascade=CascadeType.ALL) 
    private List<Round> rounds = new ArrayList<Round>(); 

    public Game(User player, User opponent) { 
     super(); 
     this.player = player; 
     this.opponent = opponent; 
     this.ended = false; 
    } 

    public Game() { 
     super(); 
     this.ended = false; 
    } 
    // ... getter/setter 
} 

在这里，我的逻辑：

// create user 
User jesaispas = userRepo.save(new User("jesaispas","pass")); 
User morgan = userRepo.findByLogin("morgan"); 

// create first game 
Game game1 = new Game(morgan,jesaispas); 
gameRepo.save(game1); 

// add first round 
Round r1 = new Round(q1.getIdQuestion()); 
//roundRepo.save(r1); 

game1.getRounds().add(r1); 
gameRepo.save(game1); 

roundRepo.addPlayerReply(3, r1.getId()); 
roundRepo.addOpponentReply(1, r1.getId()); 


Round r2 = new Round(q2.getIdQuestion()); 
//roundRepo.save(r2); 

game1.getRounds().add(r2); 
gameRepo.save(game1); 

roundRepo.addPlayerReply(4, r2.getId()); 

而且有Hibernate日志：

Hibernate: insert into round (round_id, questionid, reply_opponent, reply_player, start_date) values (null, ?, ?, ?, ?) 

Hibernate: insert into game_rounds (game, rounds) values (?, ?) 

Hibernate: update round set reply_player=? where round_id=? 

Hibernate: update round set reply_opponent=? where round_id=? 

Hibernate: select game0_.game_id as game_id1_0_1_, game0_.ended as ended2_0_1_, game0_.opponent as opponent6_0_1_, game0_.opponent_score as opponent3_0_1_, game0_.player as player7_0_1_, game0_.player_score as player_s4_0_1_, game0_.start_date as start_da5_0_1_, rounds1_.game as game1_0_3_, round2_.round_id as rounds2_1_3_, round2_.round_id as round_id1_3_0_, round2_.questionid as question2_3_0_, round2_.reply_opponent as reply_op3_3_0_, round2_.reply_player as reply_pl4_3_0_, round2_.start_date as start_da5_3_0_ from game game0_ left outer join game_rounds rounds1_ on game0_.game_id=rounds1_.game left outer join round round2_ on rounds1_.rounds=round2_.round_id where game0_.game_id=? 

Hibernate: select user0_.id as id1_4_0_, user0_.auth_token as auth_tok2_4_0_, user0_.email as email3_4_0_, user0_.last_activity as last_act4_4_0_, user0_.login as login5_4_0_, user0_.password as password6_4_0_, user0_.registration_date as registra7_4_0_, user0_.salt as salt8_4_0_ from user user0_ where user0_.id=? 

Hibernate: select user0_.id as id1_4_0_, user0_.auth_token as auth_tok2_4_0_, user0_.email as email3_4_0_, user0_.last_activity as last_act4_4_0_, user0_.login as login5_4_0_, user0_.password as password6_4_0_, user0_.registration_date as registra7_4_0_, user0_.salt as salt8_4_0_ from user user0_ where user0_.id=? 

Hibernate: insert into round (round_id, questionid, reply_opponent, reply_player, start_date) values (null, ?, ?, ?, ?) 

Hibernate: insert into round (round_id, questionid, reply_opponent, reply_player, start_date) values (null, ?, ?, ?, ?) 

Hibernate: insert into game_rounds (game, rounds) values (?, ?) 

Hibernate: insert into game_rounds (game, rounds) values (?, ?) 

Hibernate: update round set reply_player=? where round_id=? 

The problem is: the modification is not persisted, but as week can see, there is update request done by hibernate. So, Why get I do a ```findAll()``` the value is not updated ? 

你知道所在的问题呢？

Answer 1

将@Transactional放在已实现的JpaRepository类（实现RoundRepository的类）的顶部。那么你应该能够看到你的数据永久持久。