OData-EnableQuery query params filter, select, top prevents the step-by-step processing of IEnumerable and the complete ODataController handle IEnumerable results without enumeration/streaming the output data

[GitHub-TC]

.NET6 & OData 8.0.8 If a controller returns an IEnumerable as result, this is requested completely. This was partially correct in .NET Core 3.1. Especially with the parameter $top this has always been broken.

public class ApiStreamTestController : ControllerBase
{...
    [HttpGet]
    [EnableQuery]
    public IEnumerable<StreamTestModel> Get(){ foreach (var row in StreamTestModelData.DataCache) yield return row; }
}...

public class StreamTestController : ODataController
{
    [HttpGet]
    [EnableQuery]
    public IEnumerable<StreamTestModel> Get(){ foreach (var row in StreamTestModelData.DataCache) yield return row; }
...}

Here the complete foreach is queried if OData parameters are used.

The complete code with the test is attached StreamTest.NET6.zip

Summary: ODataController

• ODataStreamingTest_Raw_are_not_supported
• ODataStreamingTest_Filter_And_Select_are_not_supported
• ODataStreamingTest_Top_is_not_supported
• ODataStreamingTest_OrderBy_cannot_work (it's ok)

ControllerBase

• StreamingTest_Raw_are_supported
• StreamingTest_Filter_And_Select_are_not_supported
• StreamingTest_Top_is_not_supported
• StreamingTest_OrderBy_cannot_work (it's ok)

[GitHub-TC]

@gathogojr @corranrogue9 Are there any findings now ? 22.06.2022