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

Something like this --

from datetime import date, timedelta

class Person(models.Model):
    name = models.CharField(max_length=40)
    birthday = models.DateField()

    @staticmethod
    def upcoming_birthdays(days=30):
        today = date.today()
        where = 'DATE_ADD(birthday, INTERVAL (YEAR(NOW()) - YEAR(birthday)) YEAR) BETWEEN DATE(NOW()) AND DATE_ADD(NOW(), INTERVAL %S DAY)'
        birthdays = Person.objects.extra(where=where, params=[days]).values_list('birthday', flat=True)
        data = []
        for offset in range(0, days):
            i = 0
            d = today + timedelta(days=offset)
            for b in birthdays:
                if b.day == d.day and b.month == d.month:
                    i += 1
            data.append((d.day, i))
        return data

print Person.upcoming_birthdays()