More economical M2M handling in 3 DREF types

[szabozoltan69]

Addresses #2533

[szabozoltan69]

@susilnem @thenav56 – if you have better idea to fix the DREF m2m issue, I am open to it. Some urgency has this topic.

[szabozoltan69]

@susilnem – do you have any comments for this one?

[susilnem]

Hey @szabozoltan69 ,

I just looked into this and noticed that there’s still no schema generated for the id field of M2M relationships. Ideally, this should have been handled automatically by the serializer when passing the id for M2M fields.

As, previously it was done for the proposed actions.

Note

We might need to add some changes for these fields on the go-web-app.
Need to check this behavior for FK fields if this exists.