NULL values break profit from unique together database keys. It's better to use some default (zero?) values for that purpose. Unfortunately there is lack of databases which support zero datetimes, and python doesn't too. Need to implement into None and backwards translation.
NULL values break profit from unique together database keys. It's better to use some default (zero?) values for that purpose. Unfortunately there is lack of databases which support zero datetimes, and python doesn't too. Need to implement into None and backwards translation.