How can I add the next 1st of August as DateTimeField default value in Django?-CodePudding

I have the following model and want to add the next August (midnight time) from now as a default value for offer_start:

class Offer(models.Model):
    """
    A table to store all available offers for an upcoming season
    """
    club = models.ForeignKey(Club, on_delete=models.CASCADE, related_name='offer')
    season_start = models.CharField(max_length=40)
    seasons_duration = models.IntegerField()
    offer_start = models.DateTimeField(auto_now_add=False, default= ???)
    roi_goal = models.FloatField()
    roi_point = models.FloatField()

    def __str__(self):
        return f'Offer by {self.club} for season {self.season_start}'

Is there any way to make such a specification?

CodePudding user response：

Yes, you can make a callable with:

from django.utils.timezone import now

def next_august_1():
    today = now().date()
    if (today.month, today.day) >= (8, 1):
        return datetime(today.year 1, 8, 1)
    return datetime(today.year, 8, 1)

and then pass the callable to the DateTimeField:

class Offer(models.Model):
    # …
    #                          without parenthesis