Push failed: Bad Request

[edalatpour]

Brand new to the Datasync community toolkit. I deployed the server on Azure and loaded up the MAUI sample app in VS Code. I updated my Endpoint with the URL of my app service and ran the app. It opens an empy todo list and I can enter values. Great so far.

But then I realized I need to change line 5 of AppDbContect.cs from
#undef OFFLINE_SYNC_ENABLED to #define OFFLINE_SYNC_ENABLED.

Once I do that, I start to get some unexpected results. When I click the sync button, I get an error dialog that says "Push failed: Bad Request".

Looking at the Debug Cosole, I see the message:

[HTTP] >>> POST https://app-qg762nqxq5bva.azurewebsites.net/tables/todoitem
[HTTP] >>> {"title":"one","id":"c3ce4cb294e14cd9aed7e8b6de723d95"}
[HTTP] <<< Created Created
[HTTP] >>> {"title":"one","isComplete":false,"updatedAt":"2026-02-06T02:32:56.935Z","version":"AAAAAAAACAo=","id":"c3ce4cb294e14cd9aed7e8b6de723d95","deleted":false}
[HTTP] >>> POST https://app-qg762nqxq5bva.azurewebsites.net/tables/todoitem
[HTTP] >>> {"title":"","id":"1eaecd8933e24163ab8216b24ac8ab9c"}
[HTTP] <<< BadRequest Bad Request
[HTTP] >>> [{"memberNames":["Title"],"errorMessage":"The Title field is required."}]
CommunityToolkit.Datasync.Client.Offline.PushResult
Exception thrown: 'System.ApplicationException' in TodoApp.MAUI.dll
Exception thrown: 'System.ApplicationException' in System.Private.CoreLib.dll

The interesting thing is that my data is now in the Azure SQL database. And when I run the app again, the data populates in the client. So the synchronization seems to be working fine. But my response is coming back with something other than success.

I realized after playing with it for a bit that every time I add an item to the list, it adds a blank item with no title under the real one. That explains the error message. But why is it doing this?

After some more debugging, I realized that the Xaml for addItemEntry was triggering AddItemAsync twice, once through

Completed="OnAddItemEntryCompleted"

and again through

ReturnCommand="{Binding AddItemCommand}"
ReturnCommandParameter="{Binding Text, Source={x:Reference addItemEntry}}"

I removed the databinding lines and it is working fine now. Should I submit a PR or am I missing something about why it was done this way?