领域迁移错误 "Property 'x' has been added"

Question

我无法使用迁移领域

在我的项目中，需要配置realm的迁移。我创建了一个迁移 class，我添加了迁移并向 realmObject 添加了字段，但是迁移不起作用

我收到此错误消息：

由于以下错误需要迁移：

属性 'PickupState.latitude' 已添加。

属性 'PickupState.longitude' 已添加。

旧的 realmObject 模型

public class PickupState extends RealmObject {
  @PrimaryKey
  private long autoIncrementId;
  private long id;
  private String userName;
  private String eventType;
  private String eventData;
  private String syncStatus;
  private String syncErrorCode;

  public void setAutoIncrementId(long l) {
    autoIncrementId = l;
  }

  public long getAutoIncrementId() {
    return autoIncrementId;
  }

  public long getId() {
    return id;
  }

  public void setId(long id) {
    this.id = id;
  }

  public String getUserName() {
    return userName;
  }

  public void setUserName(String userName) {
    this.userName = userName;
  }

  public String getEventType() {
    return eventType;
  }

  public void setEventType(State eventType) {
    this.eventType = eventType.name();
  }

  public String getEventData() {
    return eventData;
  }

  public void setEventData(String eventData) {
    this.eventData = eventData;
  }

  public String getSyncStatus() {
    return syncStatus;
  }

  public void setSyncStatus(String syncStatus) {
    this.syncStatus = syncStatus;
  }

  public String getSyncErrorCode() {
    return syncErrorCode;
  }

  public void setSyncErrorCode(String syncErrorCode) {
    this.syncErrorCode = syncErrorCode;
  }
}

新领域对象

public class PickupState extends RealmObject {
  @PrimaryKey
  private long autoIncrementId;
  private long id;
  private String userName;
  private String eventType;
  private String eventData;
  private String syncStatus;
  private String syncErrorCode;
  private double latitude;
  private double longitude;

  public void setAutoIncrementId(long l) {
    autoIncrementId = l;
  }

  public long getAutoIncrementId() {
    return autoIncrementId;
  }

  public long getId() {
    return id;
  }

  public void setId(long id) {
    this.id = id;
  }

  public String getUserName() {
    return userName;
  }

  public void setUserName(String userName) {
    this.userName = userName;
  }

  public String getEventType() {
    return eventType;
  }

  public void setEventType(State eventType) {
    this.eventType = eventType.name();
  }

  public String getEventData() {
    return eventData;
  }

  public void setEventData(String eventData) {
    this.eventData = eventData;
  }

  public String getSyncStatus() {
    return syncStatus;
  }

  public void setSyncStatus(String syncStatus) {
    this.syncStatus = syncStatus;
  }

  public String getSyncErrorCode() {
    return syncErrorCode;
  }

  public void setSyncErrorCode(String syncErrorCode) {
    this.syncErrorCode = syncErrorCode;
  }

  public double getLatitude() {
    return latitude;
  }

  public void setLatitude(double latitude) {
   this.latitude = latitude;
    }

   public double getLongitude() {
    return longitude;
  }

   public void setLongitude(double longitude) {
   this.longitude = longitude;
  }
}

迁移class:

public class PickupStateMigration implements RealmMigration {

  @Override
  public void migrate(@NonNull DynamicRealm realm, long oldVersion, long newVersion) {
    final RealmObjectSchema schema = realm.getSchema().get("PickupState");
    assert schema != null;
    if (oldVersion == 0) {
        schema.addField("latitude", double.class);
        schema.addField("longitude", double.class);
      oldVersion++;
    }
  }
}

Answer 1

要执行迁移，您还需要提升架构版本。

RealmConfiguration config = new RealmConfiguration.Builder()
                                    .schemaVersion(1)
                                    .migration(new PickupStateMigration())
                                    // ...
                                    .build()

Answer 2

我制作了两个table和两个不同的schemaVersion 但是我改变了一个版本并迁移现在我已经更改了两个版本并且对它们进行了相同的迁移

我必须为每个 table 使用模块，但我没有这样做

领域迁移错误 "Property 'x' has been added"

realm migration error "Property 'x' has been added"

android

realm

realm-migration