Konstantin Kosinsky

I'm working on $apply inside $expand too. These two features are related.

It's not implemented yet. Workaround is to just do "RutHWModelsView?$apply=groupby((description,hw_model,id))". Adding $select will not change query results

Are you deriving controller form ODataController or adding [ODataFormatting] attribute explicitly? Without ODataFormatting serialization fallbacks to basic Asp .Net

I did some digging. Looks like it reproduces only for .NET Core and for cases when controller returns IActionResult. It worked properly when I modified GetAddress() method to look like:...

> if (this.JsonLightOutputContext.MessageWriterSettings.Validations != ValidationKinds.None) For performance reasons consider adding following optimization: ODataValue value = property.ODataValue; // If no validation is required, we don't need property serialization info and could...

I think you looking for `all/$count` to get just count For example: https://analytics.dev.azure.com/analytics-demo/PartsUnlimited/_odata/v3.0-preview/Areas/$count returns just number all?$count=true returns count with collection as annotation @odata.count http://docs.oasis-open.org/odata/odata/v4.01/cs01/part1-protocol/odata-v4.01-cs01-part1-protocol.html#_Toc505771213 For example: https://analytics.dev.azure.com/analytics-demo/PartsUnlimited/_odata/v3.0-preview/Areas?$count=true returns (notice:...

It isn't particular writer. I'm experimenting with case when data and _delta_log are in different folders, because we can't move data or add _delta_log to it.