android - auto generate id for document and not collection in firestore

Question

I have gone through the firestore docs and I'm yet to find an example where we have something like this.

collection
       |--document
                |--{auto-generated-id}
                                  |--property1:value1
                                  |--property2:value2
                                  |--peoperty3:value3

Rather what I often see is:

collection     
         |--{auto-generated-id}
                            |--property1:value1
                            |--property2:value2
                            |--peoperty3:value3

In the former, I cannot call add()-(which generates unique id) on a document. However this can be done in a collection as shown in the latter sketch above.

My question is thus: Is there a way firestore can help autogenerate an id after creating a document i.e How can I achieve something like this:

db.collection("collection_name").document("document_name").add(object)

Answer 1

Waitting for answers