How to use SQLite/Sqflite CRUD on Flutter App [Easiest Guide Example]
Introduction
In this guide, we will walk you through the process of using SQLite/Sqflite CRUD operations in a Flutter app. SQLite is a self-contained, file-based database system that allows you to store and manage data locally on a device. Sqflite is a Flutter plugin that provides a simple way to interact with SQLite databases. By the end of this guide, you will have a solid understanding of how to perform CRUD (Create, Read, Update, Delete) operations using SQLite/Sqflite in your Flutter app.
Setting Up Sqflite
To get started, you need to add the Sqflite plugin to your Flutter project. You can do this by adding the following dependency to your `pubspec.yaml` file:
“`dart
dependencies:
sqflite: ^2.0.0+3
path: ^1.8.0
“`
Then, run `flutter pub get` in your terminal to install the dependencies.
Creating a Database
To create a database, you need to import the Sqflite plugin and use the `openDatabase` function to create a new database. Here is an example:
“`dart
import ‘package:path/path.dart’;
import ‘package:sqflite/sqflite.dart’;
Future
return await openDatabase(
join(await getDatabasesPath(), ‘my_database.db’),
onCreate: (db, version) {
return db.execute(
“CREATE TABLE users(id INTEGER PRIMARY KEY, name TEXT, email TEXT)”,
);
},
version: 1,
);
}
“`
CRUD Operations
Now that you have a database, you can perform CRUD operations. Here are some examples:
Create
To create a new user, you can use the `insert` function:
“`dart
Future
return await db.insert(
‘users’,
user.toMap(),
conflictAlgorithm: ConflictAlgorithm.replace,
);
}
“`
Read
To read all users, you can use the `query` function:
“`dart
Future
final List
return List.generate(maps.length, (i) => User.fromMap(maps[i]));
}
“`
Update
To update a user, you can use the `update` function:
“`dart
Future
return await db.update(
‘users’,
user.toMap(),
where: ‘id = ?’,
whereArgs: [user.id],
);
}
“`
Delete
To delete a user, you can use the `delete` function:
“`dart
Future
return await db.delete(
‘users’,
where: ‘id = ?’,
whereArgs: [id],
);
}
“`
Conclusion
In this guide, we have walked you through the process of using SQLite/Sqflite CRUD operations in a Flutter app. By following the examples provided, you should now have a solid understanding of how to create, read, update, and delete data in your Flutter app using SQLite/Sqflite.
Frequently Asked Questions
1. What is SQLite/Sqflite?
SQLite/Sqflite is a self-contained, file-based database system that allows you to store and manage data locally on a device.
2. How do I add the Sqflite plugin to my Flutter project?
You can add the Sqflite plugin to your Flutter project by adding the following dependency to your `pubspec.yaml` file: `dependencies: sqflite: ^2.0.0+3`.
3. How do I create a database using SQLite/Sqflite?
You can create a database using SQLite/Sqflite by using the `openDatabase` function.
4. What is the difference between SQLite and Sqflite?
SQLite is a self-contained, file-based database system, while Sqflite is a Flutter plugin that provides a simple way to interact with SQLite databases.
5. Can I use SQLite/Sqflite for large-scale applications?
While SQLite/Sqflite can be used for large-scale applications, it may not be the best choice due to its limitations, such as limited concurrency support and lack of scalability.
