休眠查询不会返回正确的结果

Question

我正在开发一个带有休眠和弹簧的Web应用程序。我为所有配置使用注释。

我的问题是试图选择一个表白衣两个外键。

包含所有是实体：

@Entity 
@Table(name = "WAR_PLAYERS_ATTACKS") 
public class WarPlayerAttack implements Serializable { 

    private static final long serialVersionUID = 1L; 

    @Id 
    @ManyToOne(fetch = FetchType.LAZY) 
    @JoinColumn(name = "WAR_PLAYER") 
    private WarPlayer warPlayer; 

    @Id 
    @ManyToOne 
    @JoinColumn(name = "ATTACK") 
    private Attack attack; 

    @ManyToOne 
    @JoinColumn(name = "TYPE_ATTACK") 
    private TypeAttack typeAttackInWar; 

    public WarPlayerAttack() { } 

    // getters and setters 
} 

实体warPlayer：

@Entity 
@Table(name = "WAR_PLAYERS") 
public class WarPlayer implements Serializable { 

    private static final long serialVersionUID = 1L; 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    @Column(name = "ID", nullable = false) 
    private int id; 

    @ManyToOne 
    @JoinColumn(name = "WAR") 
    private War war; 

    @ManyToOne 
    @JoinColumn(name = "PLAYER") 
    private Player player; 

    @Column(name = "WAR_NUMBER") 
    private int warNumber; 

    @Column(name = "HAVE_KING") 
    private boolean haveKing; 

    @Column(name = "HAVE_QUEEN") 
    private boolean haveQueen; 

    @Column(name = "HAVE_POTIONS") 
    private boolean havePotions; 

    @OneToMany(mappedBy = "warPlayer", fetch = FetchType.EAGER) 
    private List<WarPlayerAttack> attacks; 

    public List<WarPlayerAttack> getAttacks() { 
     return attacks; 
    } 

    public void setAttacks(List<WarPlayerAttack> attacks) { 
     this.attacks = attacks; 
    } 

    private String comment; 

    public WarPlayer() {} 

吾道

@Override 
    public List<WarPlayerAttack> findByIdEnemyAndIdWar(int idEnemy, int idWar) throws DaoException { 

     List<WarPlayerAttack> attackss = null; 
     List attacks; 

     try { 
      attackss = getSession() 
       .createQuery("from WarPlayerAttack wpa where wpa.attack.enemy.id in :idEnemy and wpa.attack.enemy.war.id in :idWar") 
       .setParameter("idEnemy", idEnemy) 
       .setParameter("idWar", idWar) 
       //.createSQLQuery("select * from WAR_PLAYERS_ATTACKS where ATTACK in (select ID from ATTACKS where ENEMY in (select ID from WAR_ENEMIES where ID = ? and WAR = ?))") 
       //.setParameter(0, idEnemy) 
       //.setParameter(1, idWar) 
       .list(); 
     } catch (Exception e) { 
      throw new DaoException(e.getMessage()); 
     } 

     return attackss; 
    } 

我的问题是不冬眠收集warPlayer。只收集Attack和TypeAttack。收集JSON数据 例（攻击出现，但不是warPlayer）：

[ 
    {"attack":{"id":15,"enemy":{"id":10,"diffculty":0,"warNumber":2},"stars":1,"strategy":{"id":1,"value":"Air"},"timeRange":{"id":1,"value":"6H"}},"typeAttackInWar":{"id":3,"value":"Final 1"}}, 
    {"attack":{"id":16,"enemy":{"id":10,"diffculty":0,"warNumber":2},"stars":2,"strategy":{"id":2,"value":"Ground"},"timeRange":{"id":3,"value":"18H"}},"typeAttackInWar":{"id":4,"value":"Final 2"}} 
] 

如果我用SQL做道返回我的Object[]像[[1,1,1],[1,2,1]]

表的详细信息：

CREATE TABLE WAR_ENEMIES (
    ID INT AUTO_INCREMENT NOT NULL, 
    WAR INT NOT NULL, 
    WAR_NUMBER INT(2) NOT NULL, 
    DIFFCULTY INT(1), 

    CONSTRAINT PK_ENEMY PRIMARY KEY (ID), 
    CONSTRAINT FK_ENEMY_WAR FOREIGN KEY (WAR) REFERENCES WARS(ID) 
); 

CREATE TABLE ATTACKS (
    ID INT AUTO_INCREMENT NOT NULL, 
    ENEMY INT, 
    STARS INT(1) DEFAULT 0, 
    STRATEGY INT, 
    TIME_RANGE INT, 

    CONSTRAINT PK_ATTACK PRIMARY KEY (ID), 
    CONSTRAINT FK_ATTACK_ENEMY FOREIGN KEY (ENEMY) REFERENCES WAR_ENEMIES(ID), 
    CONSTRAINT FK_ATTACK_STRATEGY FOREIGN KEY (STRATEGY) REFERENCES STRATEGIES(ID), 
    CONSTRAINT FK_ATTACK_TIME_RANGE FOREIGN KEY (TIME_RANGE) REFERENCES TIMES_RANGES(ID) 
); 

CREATE TABLE WAR_PLAYERS (
    ID INT NOT NULL AUTO_INCREMENT, 
    WAR INT NOT NULL, 
    PLAYER INT NOT NULL, 
    WAR_NUMBER INT(2) NOT NULL, 
    HAVE_KING TINYINT(1) NOT NULL DEFAULT 1, 
    HAVE_QUEEN TINYINT(1) NOT NULL DEFAULT 1, 
    HAVE_POTIONS TINYINT(1) NOT NULL DEFAULT 1, 
    COMMENT VARCHAR(2500), 

    CONSTRAINT PK_PLAYER_IN_WAR PRIMARY KEY (ID), 
    CONSTRAINT FK_PLAYER_IN_WAR FOREIGN KEY (WAR) REFERENCES WARS(ID), 
    CONSTRAINT FK_PLAYER_IN_WAR_PLAYER FOREIGN KEY (PLAYER) REFERENCES PLAYERS(ID) 
); 
CREATE TABLE WAR_PLAYERS_ATTACKS (
    WAR_PLAYER INT NOT NULL, 
    ATTACK INT NOT NULL, 
    TYPE_ATTACK INT NOT NULL, 

    CONSTRAINT PK_WAR_PLAYER_ATTACK PRIMARY KEY (WAR_PLAYER, ATTACK), 
    CONSTRAINT FK_WAR_PLAYER_ATTACK_WAR_PLAYER 
     FOREIGN KEY (WAR_PLAYER) REFERENCES WAR_PLAYERS(ID), 
    CONSTRAINT FK_WAR_PLAYER_ATTACK_ATTACK 
     FOREIGN KEY (ATTACK) REFERENCES ATTACKS(ID), 
    CONSTRAINT FK_WAR_PLAYER_ATTACK_TYPE 
     FOREIGN KEY (TYPE_ATTACK) REFERENCES TYPE_ATTACK(ID) 

); 

我不知道我在做什么错。 （我没有太多的休眠时间）

在此先感谢和最好的问候。

Answer 1

我有类似的问题，使用EclipseLink实现，我只是在prder中解析了简单的callink .size（）方法来初始化懒惰收集。请参阅How to load lazy fetched items from Hibernate/JPA in my controller