Flutter, Firebase: retrieving data from firebase

Question

I have a question. I have an app that allows users to save posts by clicking an icon. Posts are saved in Firebase inside a collection called "saved", this collection is inside another collection called "posts". This is a saved sample post:

Here is an example of an unsaved post:

The question is, how do I retrieve only the saved posts?

Any sample code you write can help me, or even suggest an idea.

Answer 1

you can achieve your goal by multiple ways, but I think since you are trying to get all collections in your database that is names saved , consider trying Collection Group it would help get all documents inside any saved collection in your database, for more information you can check: https://firebase.google.com/docs/firestore/query-data/queries#collection-group-query