I have this use case, when I'm using a DRF serializer with many=True (hundreds of objects). If validation fails on any of these objects, I don't know on which it fails and all I'm getting in the end is field name with too general error message to trace down the failing object.

Was diving into the source code, but it seems that there are various places in which validation error could be raised, various validation error types (including django ones) and also there could be various different validators. So I can't find a single (or two) places where I could reasonably interscept execution and insert the object information, which I need.

Any suggestions on how I could get object info along with error message in the response?

In case this is useful for others and requires reasonable effort, I'd consider contributing it upstream.