在Xamarin.iOS中将本地领域转换为同步领域时发生异常 [英] Exception when converting local realm to synced realm in Xamarin.iOS

问题描述

请放心，我已经看到了相同问题的所有答案. 按照此链接输入switch-from-local-to-synced-realm

Be assured I have seen all the answer for the very same questions . following this link enter switch-from-local-to-synced-realm

我有一个本地域，我想从该域复制到同步域.

I have a local realm from where I want to copy to synced realm .

    public void InitiateSyncForPost()
    {

        realm = Realm.GetInstance(ConfigForSync);

        //realm.WriteAsync((Realm obj) =>
        //{

        //    var realmOld = Realm.GetInstance(Config);
        //    var ding = realmOld.All<Post>().ToList();
        //    var dang = realmOld.All<Comment>().ToList();
        //    var ting = realmOld.All<ImageData>().ToList();
        //    foreach (var t in dang)
        //    {
        //        obj.Add(t, false);
        //    }
        //    foreach (var t in ding)
        //    {
        //        obj.Add(t, false);
        //    }
        //foreach (var t in ting)
        //    {
        //        obj.Add(t, false);
        //    }
        //});

            realm.Write(() => {
            var realmOld = Realm.GetInstance(Config);
            var ding = realmOld.All<Post>().ToList();
            var dang = realmOld.All<Comment>().ToList();
            var ting = realmOld.All<ImageData>().ToList();

            realmOld.Dispose();


            foreach (var t in ting)
            {
                realm.Add(t, true);
            }

            foreach (var t in dang)
            {
                realm.Add(t, true);
            }
            foreach (var t in ding)
            {
                realm.Add(t, true);
            }

        });

    }

如您所见，我同时尝试了异步write和write方法. 两者都给我例外

as you can see I tried both async write and write method . both are giving me exception

当我使用WriteAsync
我遇到异常，例如条件未满足数组长度== 1(不完全记得)

When I am using WriteAsync
I get exception something like condition not met array length == 1 (don't exactly remember )

使用当前代码时，出现此异常

When I am using current code I am getting this exception

Realms.Exceptions.RealmObjectManagedByAnotherRealmException:如果对象已由另一个领域管理，则无法开始管理该领域的对象

将对象从本地域复制到同步域时，我做错什么了吗?

Is there anything wrong I am doing in copying the object from local realm to synced realm ?

推荐答案

您需要先创建>子类的非托管副本，然后再将其添加到新的领域.

You need to create a non-managed copy of your RealmObject subsclass before adding it to the new Realm.

您可以手动执行此操作，也可以通过辅助扩展程序执行此操作.

You can do this manually or via a helper extension.

var nonSyncedRealm = Realm.GetInstance(nonSyncedRealmConfig);
var syncedRealm = Realm.GetInstance(syncedRealmConfig);

var nonSyncedAll = nonSyncedRealm.All<ARealmClass>();
syncedRealm.Write(() =>
{
    foreach (var realmObject in nonSyncedAll)
    {
        var syncedObject = realmObject.NonManagedCopy<ARealmClass>();
        syncedRealm.Add(syncedObject, true);
    }
});

手册副本:

将RealmObject子类的每个属性分配给新实例的非托管对象.

Manual Copy:

Assign each property of your RealmObject subclass to a newly instanced non-managed object.

syncedRealm.Write(() =>
{
   foreach (var realmObject in nonSyncedAll)
   {
        var syncedObject = new ARealmClass
        {
            Id = realmObject.Id,
            Name = realmObject.Name,
            ~~~~~~
            ~~~~~~
            ~~~~~~
            ~~~~~~
        };
        syncedRealm.Add(syncedObject, true);
    }
});

( 1 )免责声明RealmJson.Extensions是我编写的扩展，可通过nuget软件包或源提供:

(1) Disclaimer RealmJson.Extensions is an extension I wrote, available via nuget package or source:

re: https://sushihangover.github.io/Realm.Json.Extensions/

这篇关于在Xamarin.iOS中将本地领域转换为同步领域时发生异常的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！