Django: Total birthdays each day for the next 30 days

Question

I\'ve got a model similar to this:

class Person(models.Model):
    name = models.CharField(max_length=40)
    birthday = DateTimeField() # their next birthda         


        

Answer 1

I would get the list of days and birthday count this way:

from datetime import date, timedelta    
today = date.today()
thirty_days = today + timedelta(days=30)

# get everyone with a birthday
people = Person.objects.filter(birthday__range=[today, thirty_days])

birthday_counts = []
for date in [today + timedelta(x) for x in range(30)]:
    # use filter to get only birthdays on given date's day, use len to get total
    birthdays = [date.day, len(filter(lambda x: x.birthday.day == date.day, people))]
    birthday_counts.append(birthdays)