[MAUI] Backup Realm File (WriteCopy)

[jbtdevgit]

Hi guys,

I am trying to back up my realm db file. Below is my code, not sure where I am doing it wrong as WriteCopy indicates that the Realm file should not exists before doing so. So I make sure to delete the realm file first, tried creating the directory firsthand as well since it causes other issues that the directory cannot be found.

string fullPath = Path.Combine(AppConstants.BackupFolder, AppConstants.RealmDbName);
                Realm realm = _dbService.GetRealm();
                RealmConfiguration backupConfig = new(fullPath)
                {
                    SchemaVersion = AppConstants.RealmDbSchemaVersion,
#if DEBUG
                    ShouldDeleteIfMigrationNeeded = true
#endif
                };

                string backupDirectory = Path.Combine(appDataPath, AppConstants.BackupFolder);

                if (!File.Exists(backupDirectory))
                {
                    File.Create(backupDirectory);
                }

                if(File.Exists(fullPath)) 
                {
                    Realm.DeleteRealm(backupConfig);
                }

                realm.WriteCopy(backupConfig);
                realm.Dispose();

and I am getting an exception of

{Realms.Exceptions.RealmException: open("/data/user/0/com.companyname.app/files/Backups/defaultDb.realm.lock") failed: Not a directory Path: /data/user/0/com.companyname.app/files/Backups/defaultDb.realm.lock
Exception backtrace:
<backtrace not supported on this platform>
   at Realms.NativeException.ThrowIfNecessary(Func`2 overrider) in D:\a\realm-dotnet\realm-dotnet\Realm\Realm\Native\NativeException.cs:line 88
   at Realms.SharedRealmHandle.DeleteFiles(String path) in D:\a\realm-dotnet\realm-dotnet\Realm\Realm\Handles\SharedRealmHandle.cs:line 435
   at Realms.Realm.DeleteRealm(RealmConfigurationBase configuration) in D:\a\realm-dotnet\realm-dotnet\Realm\Realm\Realm.cs:line 169
   at App.Repository.Repository.Data.DataRepository.BackupRecords(String appDataPath) in D:\Projects\Xamarin\App\AppV1\App.Repository\Repository\Data\DataRepository.cs:line 37}

If this is considered as an issue I will gladly transfer this post to an issue. Thanks!

[nirinchev]

if (!File.Exists(backupDirectory))
{
	File.Create(backupDirectory);
}

You're creating the backup directory as a file, not as a directory.

[jbtdevgit]

Holy crap, yes, that was my bad.. I changed it to Directory and deleted the Backup.File and it worked fine..