领域同步 - 无法同步，因为客户端和服务器端的属性不匹配

Question

我正在尝试使用领域同步，我按照文档中的步骤操作，创建了一个模式，然后复制了领域在 android 应用程序中建议的 java 对象模型，但是对于某些属性，如 int，加倍它会给出错误.

架构：

{
  "title": "Invoice",
  "properties": {
    "_id": {
      "bsonType": "objectId"
    },
    "ownerId": {
      "bsonType": "string"
    },
    "customerId": {
      "bsonType": "string"
    },
    "date": {
      "bsonType": "date"
    },
    "invoiceItems": {
      "bsonType": "array",
      "items": {
        "bsonType": "object",
        "properties": {
          "_id": {
            "bsonType": "objectId"
          },
          "quantity": {
            "bsonType": "int"
          },
          "trackId": {
            "bsonType": "string"
          },
          "unitPrice": {
            "bsonType": "double"
          }
        }
      }
    },
    "total": {
      "bsonType": "double"
    }
  }
}

建议型号：

案例 1：如果我使用 int 和 double

public class Invoice extends RealmObject {
    @PrimaryKey
    private ObjectId _id;

    private String ownerId;  

    private String customerId;

    private Date date;

    private double total;

    RealmList<InvoiceItem> invoiceItems;

    //getters, setters
}

错误：Failed to transform received changeset: Schema mismatch: Property 'total' in class 'Invoice' is nullable on one side and not on the other.

案例 2：如果我使用 Integer 和 Double

public class Invoice extends RealmObject {
    @PrimaryKey
    private ObjectId _id;

    private String ownerId;  

    private String customerId;

    private Date date;

    private Double total;

    RealmList<InvoiceItem> invoiceItems;

    //getters, setters
}

错误：E/AndroidRuntime: FATAL EXCEPTION: main Process: realm.example.mediastore, PID: 12939 java.lang.IllegalStateException: The following changes cannot be made in additive-only schema mode: - Property 'Invoice.total' has been made optional. at io.realm.internal.OsSharedRealm.nativeGetSharedRealm(Native Method) at io.realm.internal.OsSharedRealm.<init>(OsSharedRealm.java:175) at io.realm.internal.OsSharedRealm.getInstance(OsSharedRealm.java:251) at io.realm.BaseRealm.<init>(BaseRealm.java:141) at io.realm.BaseRealm.<init>(BaseRealm.java:108) at io.realm.Realm.<init>(Realm.java:159) at io.realm.Realm.createInstance(Realm.java:495) at io.realm.RealmCache.createInstance(RealmCache.java:494) at io.realm.RealmCache.doCreateRealmOrGetFromCache(RealmCache.java:461) at io.realm.RealmCache.createRealmOrGetFromCache(RealmCache.java:422) at io.realm.Realm.getInstance(Realm.java:424) ...

所以两者都不起作用。我不知道如何解决这个问题。

Answer 1

终止同步，擦除客户端，然后重新启用同步即可解决。