Use mongo projection to remove _id from responses

[MarioHdpz]

Enhancement proposal for issue #69

Mongo allow us to select the fields we're retreiving by providing a second argument (projection).

So I added the projection {_id: 0} to prevent that field to appear in responses instead of deleting it from the response.

One interesting thing is that the insert_one method from PyMongo was modifying the input we were providing, so I prevent this mutation by providing a copy of the result dictionary.

Hope it helps!

[paulojbleitao]

Thanks a lot!! We knew there was a better way to do it, but just didn't know enough about Mongo haha

[paulojbleitao]

I took a quick look at the documentation for this, would .find(projection={'_id': 0}) work as well? Just so we can avoid passing an empty dictionary whose meaning isn't very clear.

Also, why 0? I saw that in PyMongo's documentation they use False instead. I think it's clearer to use a boolean rather than an integer in this case, if I understood correctly 🤔

[MarioHdpz]

Hi there, I've just seen this message.

Sure, python allows you to pass it as positional or keyword argument.

And I agree with you about the False, I'm just too used to do it with zeros, but I've never read that part of Pymongo docs.

I will update the PR with these changes.