update cloud firestore document without id

Question

My Cloud Firestore looks like this:

users
  ├────random_id_1───{name, email, ...}
  ├────random_id_2───{name, email, ...}
 ...
  └────random_id_n───{name, em         


        

Answer 1

Firestore can only update documents for which it knows the complete reference, which requires the document ID. On your current structure, you will have to run a query to find the document. So something like:

firebase.firestore().collection("users")
  .where("name", "==", "Daniel")
  .get(function(querySnapshot) {
    querySnapshot.forEach(function(document) {
     document.ref.update({ ... }); 
    });
  });

If you have another attribute that is unique, I'd always recommend using that as the IDs for the documents. That way you're automatically guaranteed that only one document per user can exist, and you save yourself having to do a query to find the document.