Et til mange forhold i MyBatis

Jeg har forsøgt at følge dette spørgsmål, og jeg har oprettet et One-to-Many-forhold i Mybatis ved hjælp af annoteringer. Følgende er min kode,

UserMapper.java

@Select("SELECT teamId, name FROM TEAM")
    @Results(value = {
        @Result(property="teamId", column = "teamId"),
        @Result(property="name", column = "name"),
        @Result(property="players", column="teamId", javaType= List.class, [email protected](select="selectPlayers"))
    })   
public List<Team> getAllTeams();

@Select("SELECT * FROM PLAYER WHERE teamId = #{teamId}")
    @Results(value={
        @Result(property="playerId", column ="playerId" ),
        @Result(property="name", column = "name")
    })
List<Player> selectPlayers(String teamId);

Mit Team.java :

public class Team {

    private Long teamId;
    private String name;
    private List<Player> players;

    //...getters and setters

}

Player.java :

public class Player {

    private Long playerId;
    private String name;
    private Team team;

    //...getter and setters

}

team.sql

CREATE TABLE `team` (
  `teamId` bigint(10) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`teamId`)
)

player.sql

CREATE TABLE `player` (
  `playerId` bigint(10) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) DEFAULT NULL,
  `teamId` bigint(10) DEFAULT NULL,
  PRIMARY KEY (`playerId`),
  KEY `FK_TEAM_ID` (`teamId`),
  CONSTRAINT `FK_TEAM_ID` FOREIGN KEY (`teamId`) REFERENCES `team` (`teamId`)
)

UserServiceImpl.java

@Autowired
private UserMapper userMapper;

...
/* Get the list of teams with players data */
List<Team> teams = userMapper.getAllTeams();
...

Håber dette er nyttigt for fremtidige læsere.