XDataQuery in Service Operation: Incompatible type string and TXDataQuery

BIZ TMS XData
1

Hi,
I'm trying to invoke a service operation with a query. The Documentation (Service Operations | TMS XData documentation) says I can do this with the TXDataClient and the QueryBuilder

  IMyService = interface(IInvokable)
    [HttpGet] function List(Query: TXDataQuery): TList<TCustomer>;

  Customer := Client.Service<IMyService>.List(
    CreateQuery.From(TCustomer)
      .Filter(Linq['Name'] eq 'Foo')
      .OrderBy('Name')
      .Top(10).Skip(30)
      .QueryString
  );

But the Client doesn't compile this.... Incompatible type string and TXDataQuery.
What I'm missing?

Thank you!

2

That's because you are calling directly using the interface, which of course requires you to pass a TXDataQuery object.

Thus that's what you can do, simply pass the XDataQuery object:

  QueryReq := TXDataQuery.Create('Name eq ''foo''', 'Name', 10, 30);
  XClient.ReturnedEntities.Add(QueryReq);
  Query := XClient.Service<IMyService>.List(QueryReq);

I agree, though, that the XData Query Builder could also return a TXDataQuery object In addition to a string, for those cases.

3

Thank you for your reply.

Hmm.. maybe the documentation is wrong? The code above is from the the current documentation.

2025-03-14 07_55_06-Service Operations _ TMS XData documentation - Vivaldi
2025-03-14 07_55_06-Service Operations _ TMS XData documentation - Vivaldi717×294 8.35 KB

4

Indeed, it's wrong. We will fix it.