PonyORM release 0.7.14 (2020-11-23)

Features

• Add Python 3.9 support
• Allow to use kwargs in select: Entity.select(**kwargs) and obj.collection.select(**kwargs), a feature that was announced but actually missed from 0.7.7
• Add support for volatile collection attributes that don't throw "Phantom object appeared/disappeared" exceptions

Bugfixes

• Fix negative timedelta conversions
• Pony should reconnect to PostgreSQL when receiving 57P01 error (AdminShutdown)
• Allow mixing compatible types (like int and float) in coalesce() arguments
• Support of subqueries in coalesce() arguments
• Fix using aggregated subqueries in ORDER BY section
• Fix queries with expressions like (x, y) in ((a, b), (c, d))
• #451: KeyError for seeds with unique attributes in SessionCache.update_simple_index()