ongoDB Query Unwind issue

Working with Data Developer Tools
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2

Welcome @sohrab_shaikh :wave:

I think you need to make sure result.detections is included in the projection stage to make it accessible in the $unwind stage.

ProjectionOperation projectionPreUnwind = Aggregation.project()
    .and("result.detections").as("detections");

The other thing is on your $unwind.

Now, use $unwind on detections (as it’s directly projected).

UnwindOperation unwindOpn = Aggregation.unwind("detections");

Hope this helps.