Firestore - How create DocumentReference using path String

Question

Firebase realtime database allowed to create refrence using

 var reference = db.ref(path);

Is there any method exist in firestore so that I can create document refrence using path String.

If method exists how can I find path string in android and then how create document reference in node.js using that path.

Solution 1

Yes, you can achieve this also in Cloud Firestore. So these are your options:

FirebaseFirestore db = FirebaseFirestore.getInstance();

First option:

DocumentReference userRef = db.collection("company/users");

Second option:

DocumentReference userRef = db.document("company/users");

Third option:

DocumentReference userRef = db.collection("company").document("users");

Solution 2

For web/javascript, db.doc() will create a DocumentReference from a string:

let docRef = db.doc(pathString)

e.g. let userRef = db.doc('users/' + userId)

Solution 3

You can use FirebaseFirestore.document() and pass it the path of the document you want. Each document must be located within a collection. If you're looking for a document called documentId in a collection called collectionId, the path string will be collectionId/documentId.

Comments

[Doug Stevenson]

This isn't true. You can pass a path to FirebaseFirestore.document().

[Doug Stevenson]

The path can contain any number of collections and subcollections.

[Alex Mamo]

@DougStevenson Right, but you cannot pass a path to the collection method, only to the document, right?

[Doug Stevenson]

I don't think that's what the OP is asking. But the documentation for collection() suggests that it also can take a path. firebase.google.com/docs/reference/android/com/google/fireba‌​se/…

[Monu]

Thanks but I think you are not complete right, I tried in android studio there is no direct method FirebaseFirestore.document() first I have to create object of firestore then can call method.....Please edit your answer so that i can accept it

[Alex Mamo]

@DougStevenson Edited my answer accordingly. Thanks again!

[Doug Stevenson]

When I say FirebaseFirestore.document(), I mean the method called document() on an object of type FirebaseFirestore. You can get an object of type FirebaseFirestore by calling FirebaseFirestore.getInstance().

[Monu]

I think variable name for FirebaseFirestore should be like db or firestore because rootRef is little confusing because it is object of databse not refrence.

[Alex Mamo]

document() is not a static method and in order to be able to call it, you need to create an object of the class first. FirebaseFirestore rootRef = FirebaseFirestore.getInstance();.

[Alex Mamo]

Just changed the rootRef to db, not to be confused.