CODEWITHSUNDEEP
angularfirebasegoogle-cloud-firestore
Nasco.Chachev
Nasco.Chachev

Reputation: 676

Accessing top-level collection in Firebase Firestore

I'm currently developing a web app in angular 5 with firebase. Anyway I'm using angular/firestore2 for that purpose.

The problem I have is that I cannot access my top-level collection. My structure is something like

Collection(top level collection ['events']) -> Docs(related to userId) -> Collection -> Docs

If I'm trying to access top level within

return this.db.collection('events').valueChanges();

It returns empty array, although there are documents inside that collection. Anyway If I make new custom collection like:

Collection (top level collection ['tests']) -> Docs

and I try to access that collection within

return this.db.collection('tests').valueChanges();

It returns the array with the docs inside.. I'm really confused and would appreciate any help..

I'm using https://github.com/angular/angularfire2 for firestore/storage connections.

Upvotes: 0

Views: 478

Answers (1)

Renaud Tarnec
Renaud Tarnec

Reputation: 83058

I am not 100% sure of what follows since I don't use angular/firestore2 but it says in the documentation that "The AngularFirestoreCollection service is a wrapper around the native Firestore SDK's CollectionReference and Query types".

Queries in Firestore are shallow queries, therefore when you make a modification in a document under a sub-collection, the listener declared at the collection's parent document will not be fired.

What is explained in the "standard" Javascript SDK documentation for the onSnapshot() method is similar: "You can listen to a document with the onSnapshot() method." It does not include changes in the document's sub-collections.

Upvotes: 1

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