getIdOrInsert method
Implementation
Future<int> getIdOrInsert(String tableName, String where, List<Object?> whereArgs, String set, List<Object?> setArgs) async {
var id = await fetchOne<int>('SELECT `id` FROM $tableName WHERE $where', whereArgs);
id ??= (await query('INSERT INTO $tableName SET $set ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(`id`);', setArgs)).lastInsertID.toInt();
return id;
}