About Sorting a List of Model Instances with Lambda
Use lambda returning a tuple to sort a list of model instances by two or more fields, for example:
from datetime import datetime
MIN_DATETIME = datetime.fromtimestamp(0)
last_logged_in_users = sorted(
users,
key=(lambda obj: (
-datetime.timestamp(obj.last_login or MIN_DATETIME),
obj.last_name,
obj.first_name,
)),
)
for user in last_logged_in_users:
print(user.get_full_name())
Note that whenever possible, you should instead do the sorting at the database level, that is, QuerySets.
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