public IDocumentQuery <T> SelectSum(GroupByField field, params GroupByField[] fields)
{
if (field == null)
{
throw new ArgumentNullException(nameof(field));
}
_query.GroupBySum(field.FieldName, field.ProjectedName);
if (fields == null || fields.Length == 0)
{
return(_query);
}
foreach (var f in fields)
{
_query.GroupBySum(f.FieldName, f.ProjectedName);
}
return(_query);
}
