queryRequiredSingle method

@override Future queryRequiredSingle(String query, [ dynamic args ])

Executes a query, returning a single (non-null) result.

The query must return exactly one element. If the query returns more than one element, a ResultCardinalityMismatchError error is thrown. If the query returns an empty set, a NoDataError error is thrown.

For details on result types and args see the edgedb library docs page.

Implementation

@override
Future<dynamic> queryRequiredSingle(String query, [dynamic args]) async {
  final holder = await _pool.acquireHolder(_options);
  try {
    return await holder.queryRequiredSingle(query, args);
  } finally {
    await holder.release();
  }
}