Java Hibernate在POST上调用INSERT，但当我得到

我试图使用Hibernate存储两个对象，用户（具有ID、名称和ImageURL）和播放器（具有用户、点和FriendList）

出于某种原因，hibernate正确地存储了用户，并说它正在执行对播放器的插入，但当我试图检索我刚刚保存的播放器（或任何播放器）时，集合总是空的。用户正确返回。尝试了em.flush（），但没有帮助，尝试使用默认构造函数创建一个新的播放器，并对其执行em.persist，但得到了相同的结果

请帮忙。我真的不知道这里出了什么问题。这应该是相当基本的

这是我在玩家上发布的Web服务代码

@Path("/webService")
@RequestScoped
@Consumes({ "application/json" })
@Produces({ "application/json" })
public class MyWebService {

    @PersistenceContext(type = PersistenceContextType.EXTENDED)
    private EntityManager em;

    @POST
    @Path("/PlayerRequest/{id}/{name}/{imageURL}")
    @Consumes("application/json")
    public Player playerPOSTRequest(
            @PathParam("id") long id,
            @PathParam("name") String name,
            @PathParam("imageURL") String imageURL,
            ArrayList<String> JsonInput) {

        System.out.println("POST on a PlayerRequest for Player id: ["+ id + "]");

        User foundUser = null;
        foundUser = getUserByid(em, id);
        if(null == foundUser){
            User user = new User(id, name, imageURL);
            em.persist(user);
            foundUser = user;
        }

        Player foundPlayer = null;
        foundPlayer = getPlayerByid(em, id);

        if (null == foundPlayer) {
            Player player = new Player(foundUser);
            em.persist(player);
            em.flush(); //Try Flushing to see if that helps
            foundPlayer = player;
            Player newPlayer = new Player(); //See if default constructor is any different
            em.persist(newPlayer); //Try default constructor just to see
        } else {
            // RETURNING PLAYER
            System.out.println("Welcome back.  You are a current player.");
        }

        //Use JsonInput for stuff here

        System.out.println("Returning Player: " + foundPlayer);
        return foundPlayer;
    }// playerPOSTRequest

}//myWebService

当我运行此过程时，这里是我在控制台中获得的输出，请注意Hibernate正在生成的两个INSER-into-PLAYER语句（一个用于默认构造函数播放器），但在检索中，我能够获得用户，但没有现有的播放器：

 POST on a PlayerRequest for Player ID: [36985]
 Hibernate: 
     select
         user0_.id as id12_,
         user0_.myID as myID12_,
         user0_.ImageURL as ImageURL12_,
         user0_.Name as Name12_,
         user0_.version as version12_ 
     from
         USER user0_ 
     where
         user0_.myID=?
 New User for PlayerInfo for Player request.  Adding User to the system.
 Hibernate: 
     call next value for hibernate_sequence
 Hibernate: 
     insert 
     into
         USER
         (myID, ImageURL, Name, version, id) 
     values
         (?, ?, ?, ?, ?)
 Hibernate: 
     select
         player0_.id as id13_,
         player0_.FriendList as FriendList13_,
         player0_.Points as Points13_,
         player0_.version as version13_ 
     from
         PLAYER player0_ cross 
     join
         USER user1_ 
     where
         player0_.id=user1_.id 
         and user1_.myID=?
 New Player request.  Adding Player to the system.
 Hibernate: 
     call next value for hibernate_sequence
 Hibernate: 
     insert 
     into
         PLAYER
         (FriendList, Points, version, id) 
     values
         (?, ?, ?, ?)
 Hibernate: 
     call next value for hibernate_sequence
 Hibernate: 
     insert 
     into
         PLAYER
         (FriendList, Points, version, id) 
     values
         (?, ?, ?, ?)
 Returning Player: Player [PlayerInfo_ID=36985, PlayerInfo_Name=Joe Smith Points=100]

 GET on specific Player for User ID: [36985]
 Hibernate: 
     select
         player0_.id as id13_,
         player0_.FriendList as FriendList13_,
         player0_.Points as Points13_,
         player0_.version as version13_ 
     from
         PLAYER player0_ cross 
     join
         USER user1_ 
     where
         player0_.id=user1_.id 
         and user1_.myID=?
 Returning Player: null

 GET on All Players
 Hibernate: 
     select
         player0_.id as id13_,
         player0_.FriendList as FriendList13_,
         player0_.Points as Points13_,
         player0_.version as version13_ 
     from
         PLAYER player0_ cross 
     join
         USER user1_ 
     where
         player0_.id=user1_.id 
         and user1_.myID>?
 Returning List: []

 GET on specific User for User ID: [36985]
 Hibernate: 
     select
         user0_.id as id12_,
         user0_.myID as myID12_,
         user0_.ImageURL as ImageURL12_,
         user0_.Name as Name12_,
         user0_.version as version12_ 
     from
         USER user0_ 
     where
         user0_.myID=?
 Returning User: User [ID=36985, Name=Bob Smith ImageURL=www.myImage.com]

---

问题似乎出在播放器的映射注释中

@OneToOne
@JoinColumn(name="id")

---

指定给JoinColumn的名称与指定给id（PK）的名称相同。因此，Hibernate生成了错误的sql查询，在两个表之间进行了不正确的连接。

Wow。谢谢，从用户处更改了name=“myID”，现在可以使用了。非常感谢！非常好！如果投票对你有用的话，那就投票吧！；）

 POST on a PlayerRequest for Player ID: [36985]
 Hibernate: 
     select
         user0_.id as id12_,
         user0_.myID as myID12_,
         user0_.ImageURL as ImageURL12_,
         user0_.Name as Name12_,
         user0_.version as version12_ 
     from
         USER user0_ 
     where
         user0_.myID=?
 New User for PlayerInfo for Player request.  Adding User to the system.
 Hibernate: 
     call next value for hibernate_sequence
 Hibernate: 
     insert 
     into
         USER
         (myID, ImageURL, Name, version, id) 
     values
         (?, ?, ?, ?, ?)
 Hibernate: 
     select
         player0_.id as id13_,
         player0_.FriendList as FriendList13_,
         player0_.Points as Points13_,
         player0_.version as version13_ 
     from
         PLAYER player0_ cross 
     join
         USER user1_ 
     where
         player0_.id=user1_.id 
         and user1_.myID=?
 New Player request.  Adding Player to the system.
 Hibernate: 
     call next value for hibernate_sequence
 Hibernate: 
     insert 
     into
         PLAYER
         (FriendList, Points, version, id) 
     values
         (?, ?, ?, ?)
 Hibernate: 
     call next value for hibernate_sequence
 Hibernate: 
     insert 
     into
         PLAYER
         (FriendList, Points, version, id) 
     values
         (?, ?, ?, ?)
 Returning Player: Player [PlayerInfo_ID=36985, PlayerInfo_Name=Joe Smith Points=100]

 GET on specific Player for User ID: [36985]
 Hibernate: 
     select
         player0_.id as id13_,
         player0_.FriendList as FriendList13_,
         player0_.Points as Points13_,
         player0_.version as version13_ 
     from
         PLAYER player0_ cross 
     join
         USER user1_ 
     where
         player0_.id=user1_.id 
         and user1_.myID=?
 Returning Player: null

 GET on All Players
 Hibernate: 
     select
         player0_.id as id13_,
         player0_.FriendList as FriendList13_,
         player0_.Points as Points13_,
         player0_.version as version13_ 
     from
         PLAYER player0_ cross 
     join
         USER user1_ 
     where
         player0_.id=user1_.id 
         and user1_.myID>?
 Returning List: []

 GET on specific User for User ID: [36985]
 Hibernate: 
     select
         user0_.id as id12_,
         user0_.myID as myID12_,
         user0_.ImageURL as ImageURL12_,
         user0_.Name as Name12_,
         user0_.version as version12_ 
     from
         USER user0_ 
     where
         user0_.myID=?
 Returning User: User [ID=36985, Name=Bob Smith ImageURL=www.myImage.com]

@OneToOne
@JoinColumn(name="id")