add method
Inserts a new record into the database table.
data: A map containing the column names and values to insert.
Returns a Future that completes when the operation is done. Throws an error if the insertion fails.
Implementation
Future<void> add(Map<String, Object?> data) async {
try {
final db = await database;
await db.insert(_helper.tableName, data);
} catch (e) {
return Future.error("Error in adding the data: $e");
}
}