tommienu/firestore_collection

Firestore extension with cache-first pagination and stream builder support.

firestore_collection

This package is used in production but It doesn't provide any warranty. So, be careful with your data!

Firestore extension with cache-first pagination and stream builder support.

Features

• Cache-first query support.
• Easy to use with StreamBuilder.
• Pagination support.
• Collection listener support. For documents which has greater value related to order field.
• Remove document-list with BatchWrite.
• Select documents to remove.
• Fake remove operation with document update.
• Custom compare function support for ordering list as desired in ListView.

Usage

Initialize a FirestoreCollection

FirestoreCollection fireCollection = FirestoreCollection(
    collection: FirebaseFirestore.instance
        .collection('posts')
        .doc('post_id')
        .collection("comments"),
    initializeOnStart: true, // first page will be fetched immediately
    offset: 15, // page size
    serverOnly: false, // cache first
    live: true, // notifies to newest docs
    query: FirebaseFirestore.instance
        .collection('posts')
        .doc('post_id')
        .collection("comments"),
    queryOrder: QueryOrder(
        orderField: 'timestamp',
    ),
);

Use it with StreamBuilder

StreamBuilder(
    stream: fireCollection.stream,
    builder: (context, AsyncSnapshot<List<DocumentSnapshot>> snapshot) {
        return ListView.builder(itemBuilder: (context, index) {
            return Text(snapshot.data.elementAt(index).id);
        });
    },
);

Fetch next page

fireCollection.nextPage();

Don't forget to dispose

await fireCollection.dispose();