Firebase 9 - How to do new doc ref

Question

Hello guys i've been trying to convert this code into modular firebase 9:

fb8: const userRef = db.collection('Users').doc();

to fb9: const userRef = doc(db, 'Users');

But i'm getting this error: FirebaseError: Invalid document reference. Document references must have an even number of segments, but Users has 1.

Please help!

score 1 · Accepted Answer · answered Oct 13 '21 at 07:30

1

The doc() method is equivalent to .collection('users').doc('docID') where you need to specify the ID. If you are trying to add a document with random ID then you add use addDoc() with collection() as shown below:

const usersCol = collection(db, 'Users')

await addDoc(usersCol, {...data})

If you want the random ID before adding the document then you can try this:

const userRef = doc(collection(db, 'Users'));
console.log(userRef.id)

Document references must have an even number of segments, but Users has 1.

You can checkout this answer for explanation of doc() and collection():

Firestore: What's the pattern for adding new data in Web v9?

answered Oct 13 '21 at 07:30

Dharmaraj

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but i need to grab the id first before adding it, guess i will just use the old method. thanks man :D – Jonathan Jeshua Laniba Oct 14 '21 at 00:54
1

@JonathanJeshuaLaniba the 2nd method does not create a document but you get a reference for it and hence get the ID as shown. – Dharmaraj Oct 14 '21 at 04:31
thank you for helping me :D i was not able to make it work with the new logic, i did use the old one thank you :D – Jonathan Jeshua Laniba Oct 21 '21 at 02:50

Firebase 9 - How to do new doc ref

1 Answers1