: a collection (as of books or artwork) that is part of a larger collection … so many of her architects' drawings are for furniture designs that she has what constitutes a virtual subcollection of furniture sketches …—
Should you use Subcollections in firestore?
Subcollections will always give you a more structured database schema, as you can always refer to a subcollection that is related only to a specific document. So you can nest only data that is related to a particular document.Jan 19, 2019
What is a snapshot in firestore?
When you set a listener, Cloud Firestore sends your listener an initial snapshot of the data, and then another snapshot each time the document changes. When you use get() you "retrieve the content of a single document" only once. ... Then, each time the contents change, another call updates the document snapshot.
What is a Subcollection in firestore?
A subcollection is a collection associated with a specific document. Note: You can query across subcollections with the same collection ID by using Collection Group Queries. You can create a subcollection called messages for every room document in your rooms collection: collections_bookmark rooms. class roomA.Nov 11, 2021
How do I get all the Subcollection in firestore?
- If the document has one or more subcollections the page will display their id(s).
- If the document at the path does not exist or if it does not have any subcollection, the Cloud Function will return an empty array.