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https://github.com/outdatedguy/firebase_pagination
A flutter package to paginate Realtime Database and Firestore with real-time updates.
https://github.com/outdatedguy/firebase_pagination
firebase flutter package pagination realtime
Last synced: about 2 months ago
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A flutter package to paginate Realtime Database and Firestore with real-time updates.
- Host: GitHub
- URL: https://github.com/outdatedguy/firebase_pagination
- Owner: OutdatedGuy
- License: bsd-3-clause
- Created: 2022-06-25T20:58:00.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2024-08-20T13:57:24.000Z (4 months ago)
- Last Synced: 2024-10-22T15:15:22.624Z (2 months ago)
- Topics: firebase, flutter, package, pagination, realtime
- Language: Dart
- Homepage: https://pub.dev/packages/firebase_pagination
- Size: 466 KB
- Stars: 13
- Watchers: 1
- Forks: 11
- Open Issues: 9
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
README
# Firebase Pagination
A simple and effective way to **Paginate** Firebase related data.
[![pub package][package_svg]][package]
[![GitHub][license_svg]](LICENSE)
[![GitHub issues open][issues_svg]][issues]
[![GitHub issues closed][issues_closed_svg]][issues_closed]
| Realtime Database | Firestore |
| :--------------------------------------: | :--------------------------: |
| ![RealtimeDB Ascending Pagination Demo] | ![Firestore Pagination Demo] |
| ![RealtimeDB Descending Pagination Demo] | |
## Features
- `FirestorePagination` to simplify paginating firestore collections.
- `RealtimeDBPagination` to simplify paginating realtime database nodes.
- Get live updates when new data is added using `isLive` property.
- Get realtime changes on already loaded data.
- Descending pagination for `RealtimeDBPagination`.
## Getting started
#### Add to Dependencies
```yaml
firebase_pagination: ^4.0.1
```
#### Import the package
```dart
import 'package:firebase_pagination/firebase_pagination.dart';
```
## Usage
#### Simplest Firestore Pagination
```dart
FirestorePagination(
query: FirebaseFirestore.instance.collection('scores').orderBy('score'),
itemBuilder: (context, docs, index) {
final data = docs[index].data() as Map;
// Do something cool with the data
},
),
```
#### Simplest Firebase Realtime Database Pagination
```dart
RealtimeDBPagination(
query: FirebaseDatabase.instance.ref().child('scores').orderByChild('score'),
orderBy: 'score',
itemBuilder: (context, dataNodes, index) {
final data = dataNodes[index].value as Map;
// Do something cool with the data
},
),
```
#### For more examples, see the [examples](example/example.md) section.
## How it Works
- A _data listener_ is added to the query with the given limit.
- Every time the user scrolls to the bottom of the list, the limit is increased.
- If there are any changes for the loaded data, it will be automatically updated.
- If `isLive` is true, a _live listener_ is added to fetch data before the first load. (i.e. Newly added data will be automatically loaded)
- When new data is added, the _data listener_ will be removed and a new _data listener_ will be added with the new limit.
- Also the _live listener_ will be removed and a new _live listener_ will be added.
## Efficiency & Performance
- Both `FirestorePagination` and `RealtimeDBPagination` uses maximum of two `stream listeners` to fetch data.
- Hence it is **performant** and uses **minimum amount of resources**.
- The listeners are automatically removed when the widget is removed from the widget tree.
- For fetching data, the widgets uses [this hack](https://stackoverflow.com/a/70645473) to minimize the number of reads from the database.
## Description
| Property | Description | Type | Default |
| :----------------: | :----------------------------------------------------------------------------------------------------: | :------------------: | :-----------------------------: |
| `query` | **The query to use to fetch data from Firestore / Realtime Database.** | _Query_ | - |
| `itemBuilder` | **The builder to use to build the items in the list.** | _Function_ | - |
| `separatorBuilder` | **The builder to use to render the separator.** | _Function_ | `separatorBuilder (package fn)` |
| `limit` | **The number of items to fetch from Database at once.** | _int_ | `10` |
| `viewType` | **The type of view to use for the list.** | _ViewType_ | `ViewType.list` |
| `isLive` | **Whether to fetch newly added items as they are added to Database.** | _bool_ | `false` |
| `gridDelegate` | **The delegate to use for the GridView.** | _SliverGridDelegate_ | `crossAxisCount: 2` |
| `wrapOptions` | **The Wrap widget properties to use.** | _WrapOptions_ | `WrapOptions()` |
| `pageOptions` | **The PageView widget properties to use.** | _PageOptions_ | `PageOptions()` |
| `onEmpty` | **The widget to use when data is empty.** | _Widget_ | `EmptyScreen()` |
| `bottomLoader` | **The widget to use when more data is loading.** | _Widget_ | `BottomLoader()` |
| `initialLoader` | **The widget to use when data is loading initially.** | _Widget_ | `InitialLoader()` |
| `scrollDirection` | **The scrolling direction of the ScrollView.** | _Axis_ | `false` |
| `reverse` | **Whether the ScrollView scrolls in the reading direction.** | _bool_ | `false` |
| `shrinkWrap` | **Should the ScrollView be shrink-wrapped.** | _bool_ | `false` |
| `physics` | **The scroll behavior to use for the ScrollView.** | _ScrollPhysics_ | - |
| `padding` | **The padding to use for the ScrollView.** | _EdgeInsetsGeometry_ | - |
| `controller` | **The controller to use for the ScrollView.** | _ScrollController_ | ScrollController() |
| `pageController` | **The controller to use for the PageView.** | _PageController_ | PageController() |
| `descending` | **Whether the data should be fetched in descending order or not. Only works for RealtimeDBPagination** | _bool_ | `false` |
### If you liked the package, then please give it a [Like 👍🏼][package] and [Star ⭐][repository]
[package_svg]: https://img.shields.io/pub/v/firebase_pagination.svg?color=blueviolet
[license_svg]: https://img.shields.io/github/license/OutdatedGuy/firebase_pagination.svg?color=purple
[issues_svg]: https://img.shields.io/github/issues/OutdatedGuy/firebase_pagination.svg
[issues_closed_svg]: https://img.shields.io/github/issues-closed/OutdatedGuy/firebase_pagination.svg?color=green
[package]: https://pub.dev/packages/firebase_pagination
[repository]: https://github.com/OutdatedGuy/firebase_pagination
[issues]: https://github.com/OutdatedGuy/firebase_pagination/issues
[issues_closed]: https://github.com/OutdatedGuy/firebase_pagination/issues?q=is%3Aissue+is%3Aclosed
[RealtimeDB Ascending Pagination Demo]: https://github.com/OutdatedGuy/firebase_pagination/assets/74326345/6f888eac-13c4-422d-a662-0f7bf7f626f8
[RealtimeDB Descending Pagination Demo]: https://github.com/OutdatedGuy/firebase_pagination/assets/74326345/df101fa2-8a51-4fdf-a900-828abb6dbaee
[Firestore Pagination Demo]: https://github.com/OutdatedGuy/firebase_pagination/assets/74326345/7c300ae2-49fb-439e-86fc-10be387c56f8