querySingle method

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

Executes a query, returning a single (possibly null) result.

The query must return no more than one element. If the query returns more than one element, a ResultCardinalityMismatchError error is thrown.

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

Implementation

@override
Future<dynamic> querySingle(String query, [dynamic args]) {
  return _runOp(
      'querySingle',
      () => _conn.fetch(
          query: query,
          args: args,
          outputFormat: OutputFormat.binary,
          expectedCardinality: Cardinality.atMostOne,
          state: _holder.options.session));
}