exists method
Check if a value exists in the table
Implementation
Future<bool> exists(
{required String table,
required String where,
bool verbose = false}) async {
/// [table] is the table to use and [where] the sql where clause
///
/// Returns a future with true if the data exists
try {
if (!_isReady) {
throw DatabaseNotReady();
}
final timer = Stopwatch()..start();
final q = 'SELECT COUNT(*) FROM $table WHERE $where';
late int count;
await _db!.transaction((txn) async {
count = Sqflite.firstIntValue(await txn.rawQuery(q))!;
});
timer.stop();
if (verbose) {
final msg = "$q in ${timer.elapsedMilliseconds} ms";
print(msg);
}
if (count > 0) {
return true;
}
} catch (e) {
rethrow;
}
return false;
}