Firestore - How to get document id after adding a document to a collection

Question

Is there a way to acquire the document id that was generated after adding a document to a collection?

If I add a document to a collection that represents a \"post\"

Answer 1

Here's what I do, as mentioned in your question. Not sure if it is best practice, but it works for easy access.

When creating the document in the first place

firebase.firestore().collection("cities").doc().set({ name: Tokyo,
country: Japan })

you can set the id of the doc and put that exact id in it as a property:

firebase.firestore().collection("cities").doc('id-generated-from-somewhere')
.set({ id: 'id-generated-from-somewhere', name: Tokyo, country: Japan })