새로운 관계형 realmResults를 만드는 방법은 무엇입니까?

Question

다른 영역 객체에 따라 영역 객체 (VolleyballPlayer)를 만들었습니다. 여성 개체가 배구 개체를 포함하지만 남성 개체가 Volleyball 개체가 일부 있습니다.

나는 VolleyballPlayer에게 성별 그룹 여성 및 남성 객체 개체를 만들려고합니다. 그러나 나는 RealmResults에 따라 그것을하는 방법을 발견 할 수 없었다.

내 영역 객체 :

public class Volleyball extends RealmObject { 
    private int round; 
    // ... Generated getters and setters ... 
} 

public class Gender extends RealmObject { 
    private String gender; 
    // ... Generated getters and setters ... 
} 

//...All females play volleyball. 
public class Female extends RealmObject { 
    private Volleyball volleyball; 
    private int clasp; 
    // ... Generated getters and setters ... 
} 

public class Male extends RealmObject { 
    private Volleyball volleyball; 
    private int belt; 
    // ... Generated getters and setters ... 
} 

새로운 객체 :

public class VolleyballPlayer extends RealmObject { 
    private Volleyball volleyball; 
    private Gender gender; 

    // ... Generated getters and setters ... 
} 

내가 allFemale 및 allMale realmResults을 가지고 있지만 내가 ALLPlayer 웹 realmResults을하지 않았습니다.

RealmResults<Female> allFemales = mRealm.where(Female.class).findAll(); 
RealmResults<Male> allMales = mRealm.where(Male.class).findAll(); 

모든 여학생 배구를하고 난에서 배구를 (여성의) 모든 선수를 통해 남성 선수는 어떻게 추출 할 수 있습니까? 내가 코드 아래에 쓰기 영역의 방법이있다 :

public void setAllVolleyballPlayers(Realm mRealm) { 

     Realm mRealm = getRealm(); 

     mRealm.beginTransaction(); 

     addAllMalePlayers(mRealm); 
     addAllFemalePlayers(mRealm); 

     mRealm.commitTransaction(); 
    } 

    private void addAllMalePlayers(Realm mRealm) { 

     RealmResults<Male> allMalePlayers = new MalePlayersQueries().getAllMales(mRealm); 

     mRealm.beginTransaction(); 

     if (allMalePlayers != null && allMalePlayers.size() > 0) { 

      VolleyballPlayer volleyballPlayer = mRealm.createObject(VolleyballPlayer.class); 

      Gender gender = mRealm.createObject(Gender.class); 
      gender.setGender(getString(R.string.male)); 

      volleyballPlayer.setGender(gender); 

      for (Male male : allMales) { 

      VolleyballPlayer volleyballPlayer = 
      mRealm.createObject(VolleyballPlayer.class); 
      volleyballPlayer.setVolleyball(male.getVolleyball()); 

      } 
     } 
    } 

    private void addAllFemalePlayers(Realm mRealm) { 

      RealmResults<Female> allFemales = new FemaleQueries().getAllPlayers(mRealm); 

      VolleyballPlayer volleyballPlayer = mRealm.createObject(VolleyballPlayer.class); 

      Gender gender = mRealm.createObject(Gender.class); 
      gender.setGender(getString(R.string.female)); 

      volleyballPlayer.setGender(gender); 

      ////// All female students play volleyball and how can I extract male players from all the players(in females) who play this volleyball and get females 
} 

와 나는 테이블의 끝에서 보여주고 싶은 :

**Volleyball Players** 

    **Female** 

    Emma 
    Olivia 
    Sophia 

    **Male** 

    John 
    Jame 

Answer 1

가 개인적으로 나는 싱글 "의 힘을 활용하는 것 discriminator field를 이용한 table-inheritance "를 수행한다.

public class Volleyball extends RealmObject { 
    private int round; 

    @LinkingObjects("volleyball") 
    private final RealmResults<VolleyBallPlayer> playedBy = null; 
    // ... Generated getters and setters ... 
} 

public class VolleyBallPlayer extends RealmObject { 
    private Volleyball volleyball; 
    @Index 
    private String gender; 
    private int femaleClasp; // 0, or with Integer `null` if male 
    private int maleBelt; // 0, or with Integer `null` if female 
    // ... Generated getters and setters ... 
} 

이제

RealmResults<VolleyBallPlayer> femalePlayers = realm.where(VolleyBallPlayer.class) 
    .equalTo("gender", Gender.FEMALE.name()).findAll(); 
RealmResults<VolleyBallPlayer> malePlayers = realm.where(VolleyBallPlayer.class) 
    .equalTo("gender", Gender.MALE.name()).findAll(); 

심지어

RealmResults<Volleyball> maleVolleyballs = realm.where(Volleyball.class) 
    .equalTo("playedBy.gender", Gender.MALE.name()).findAll();