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Type: Bug
Resolution: Fixed
Priority: Major - P3
Fix Version/s: None
Affects Version/s: None
Component/s: None
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Github URL:
https://github.com/realm/realm-dotnet/issues/3597
GitHub#:
3597

What happened?

I'm migrating data that was previously "float?" and IList<float?" to the type "string" and "IList<string>". I am attaching the code that performs this migration, and everything goes well when I give a DynamicApi.GetList in an IEmbeddedObject, however, when I call a DynamicApi.GetList in a "float?" gives the error "KeyNotFoundException: The given key '' was not present in the dictionary". him being the "float?" type. The error only happens when I try to call a GetList in the "MeasuredValues" field, the rest of the code works fine and performs the correct conversion. Does anyone have an idea what I might be doing wrong? See the error that appears:

See how MeasuredValues is in the database, it appears in the scope as List<float> but it is a List<float?>, I believe this is a bug in the realm, but I guarantee that in the code we are saving it as IList<float?>.

I'm attaching a drive with the old bank (the bank that tries to get "MeasuredValues") in case it helps with anything. Link drive :
LinkDrive

Repro steps

Save an object in the database with the field type "IList<float?>
Perform a database migration by calling GetList from an "Ilist<float?">

The error occurs exactly on this line:

Version

.NET Framework

What Atlas Services are you using?

Local Database only

What type of application is this?

Unity

Client OS and version

Unity

Code snippets

if (oldSchemaVersion < 2)
{
    var oldOrders = migration.OldRealm.DynamicApi.All("OrderServiceEntity");
    var newOrders = migration.NewRealm.All<OrderServiceEntity>();

    for (int i = 0; i < newOrders.Count(); i++)
    {
        var oldOrder = oldOrders.ElementAt(i);
        var newOrder = newOrders.ElementAt(i);

        var oldCalibration = oldOrder.DynamicApi.Get<IEmbeddedObject>("Calibration");
        var newCalibration = newOrder.Calibration;

        if (oldCalibration != null)
        {
            for (int j = 0; j < oldCalibration.DynamicApi.GetList<IEmbeddedObject>("TablePages").Count; j++)
            {
                IEmbeddedObject oldPage = oldCalibration.DynamicApi.GetList<IEmbeddedObject>("TablePages")[j];
                var newPage = newCalibration.TablePages[j];

                for (int k = 0; k < oldPage.DynamicApi.GetList<IEmbeddedObject>("Rows").Count; k++)
                {
                    UnityEngine.Debug.LogError(k);
                    var oldRow = oldPage.DynamicApi.GetList<IEmbeddedObject>("Rows")[k];
                    var newRow = newPage.Rows[k];

                    // Convertendo o campo Nominal
                    var oldNominal = oldRow.DynamicApi.Get<float?>("Nominal");
                    newRow.Nominal = oldNominal.HasValue ? oldNominal.Value.ToString() : null;

                    // The error is here on this line:
                    IList<float?> oldMeasuredValues = oldRow.DynamicApi.GetList<float?>("MeasuredValues");

                    var newMeasuredValues = new List<string?>();
                    foreach (var value in oldMeasuredValues)
                    {
                        newMeasuredValues.Add(value.HasValue ? value.Value.ToString() : null);
                    }

                    newRow.MeasuredValues.Clear();
                    foreach (var newMeasured in newMeasuredValues)
                    {
                        newRow.MeasuredValues.Add(newMeasured);
                    }
                }
            }
        }
    }
}

Stacktrace of the exception/crash you're getting

Unable to find source-code formatter for language: shell. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml

KeyNotFoundException: The given key '' was not present in the dictionary.
System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) (at <51ee0c51c90047b488b10b1b78b365d8>:0)
Realms.Realm+RealmMetadata.get_Item (System.String objectType) (at <20c8551e199242abadc6d7b62871711c>:0)
Realms.ObjectHandle.GetList[T] (Realms.Realm realm, System.String propertyName, Realms.Metadata metadata, System.String objectType) (at <20c8551e199242abadc6d7b62871711c>:0)
Realms.DynamicObjectApi.GetList[T] (System.String propertyName) (at <20c8551e199242abadc6d7b62871711c>:0)
Ark.API.CMMS.Database.CmmsDatabase.MigrationCallBack (Realms.Migration migration, System.UInt64 oldSchemaVersion) (at Assets/Scripts/Api/CMMS/Database/CmmsDatabase.cs:174)
Realms.SharedRealmHandle.OnMigration (System.IntPtr oldRealmPtr, System.IntPtr newRealmPtr, System.IntPtr migrationSchema, Realms.Native.Schema oldSchema, System.UInt64 schemaVersion, System.IntPtr managedConfigHandle) (at <20c8551e199242abadc6d7b62871711c>:0)
Rethrow as AggregateException: Exception occurred in a Realm.MigrationCallback callback. (The given key '' was not present in the dictionary.)
Realms.NativeException.ThrowIfNecessary () (at <20c8551e199242abadc6d7b62871711c>:0)
Realms.SharedRealmHandle.Open (Realms.Native.Configuration configuration) (at <20c8551e199242abadc6d7b62871711c>:0)
Realms.RealmConfiguration.CreateHandle (Realms.Native.Configuration& configuration) (at <20c8551e199242abadc6d7b62871711c>:0)
Realms.RealmConfiguration+<>c__DisplayClass29_0.<CreateHandleAsync>b__1 (System.Threading.Tasks.Task _) (at <20c8551e199242abadc6d7b62871711c>:0)
System.Threading.Tasks.ContinuationResultTaskFromTask`1[TResult].InnerInvoke () (at <51ee0c51c90047b488b10b1b78b365d8>:0)
System.Threading.Tasks.Task.Execute () (at <51ee0c51c90047b488b10b1b78b365d8>:0)
--- End of stack trace from previous location where exception was thrown ---
Realms.RealmConfigurationBase.CreateRealmAsync (System.Threading.CancellationToken cancellationToken) (at <20c8551e199242abadc6d7b62871711c>:0)
Ark.Persistence.Database.RealmDatabase.InitAsync () (at

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