When it comes to the official documentation regarding how to update elements in an array in Firestore, it says that: If your document contains an array field, you can use arrayUnion() and arrayRemove() to add and remove elements. arrayUnion() adds elements to an array but only elements not already present.
Read moreHow do I update my firestore value?
Update and Delete in Firestore
Read moreCan you query in firestore?
Cloud Firestore provides powerful query functionality for specifying which documents you want to retrieve from a collection or collection group . These queries can also be used with either get() or addSnapshotListener() , as described in Get Data and Get Realtime Updates.11 Kas 2021
Read moreWhat are queries in Firebase?
Firebase queries. Firebase queries are modifications of a ref . So you’ll create a ref as usual, but then you’ll add some query parameters to it. Once you add query parameters to a ref, you can’t take them off or change them… you’d need to create a new ref for that.
Read moreHow do I query in Firebase?
Firebase – Queries
Read moreCan we write query in Firebase?
Queries can only order by one key at a time . Calling orderByChild() multiple times on the same query is an error. Firebase queries allow you to order your data by any child key on the fly.11 Mar 2021
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