Filter phenomenonTime in $expand causes a truncated response

[DanielBertocci]

Bug Description

In some situations like using the $expand operator and $filter on phenomenonTime, causes a truncated response with an invalid JSON.

Current Behavior:
The server response is 200 OK with the following body:
{ "value": [

Expected Behavior:
A 4xx http error warning that despite the input is ISO8601 compliant, the server accepts only UTC complete datetimes or a valid json response

Steps to Reproduce:

1. Have a Thing and a Datastream stored
2. Execute one of the following queries:
   • Things?$expand=Datastreams($filter=phenomenonTime gt 2000-01-01)
   • Things?$expand=Datastreams($filter=phenomenonTime/start gt 2000-01-01)

Screenshots:

Environment

Application Version:
2.2.0 (but I have experienced it also in previous versions)

[hylkevds]

Hmm, indeed. This is because the $expand isn't fully evaluated until it is required, and by then the output has already started. Because of that, the result-code can't be changed to an error any more.