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我的models.py看起来像

class OneTimeEvent(models.Model):
    title = models.CharField(max_length = 160)
    location = models.CharField(max_length = 200, blank = True)
    event_date = models.DateTimeField('event date',blank = True, null = True)
    price = models.IntegerField(max_length = 20, blank = True, null = True)
    seats = models.IntegerField(max_length = 20, blank = True, null = True)
    abstract = models.TextField()
    event_plan = models.TextField()
    available_seats = models.IntegerField(max_length = 20, blank = True, null = True)
    booked_seats = models.IntegerField(max_length = 20, blank = True, null = True)
    byt_url = models.CharField(max_length = 160, …