如何重复django事件发生周期？

Question

我有一个模型，它可以获取事件应该始终发生的星期几和时间。此外，人们可以参加活动的天数。

def validate_only_one(obj):
    model = obj.__class__
    if model.objects.count() > 0 and obj.id != model.objects.get().id:
        raise ValidationError("Você só pode adicionar um evento") # You can add only one schedule


class ModelPresenca(models.Model):
    DIAS = (
        # The days are in Portuguese
        ('Domingo', 'Domingo'),
        ('Segunda', 'Segunda'),
        ('Terça', 'Terça'),
        ('Quarta', 'Quarta'),
        ('Quinta', 'Quinta'),
        ('Sexta', 'Sexta'),
        ('Sábado', 'Sábado'),
    )
    dia = models.CharField('Dia da Pelada', max_length=10, help_text='Escolha o dia da pelada', choices=DIAS) # day of the event 
    hora_pelada = models.TimeField('Horário da pelada (ex: 19:30)', help_text='Hora em que sua pelada é realizada') # hour of the event 
    dias_antecedencia = models.PositiveIntegerField('Dias antecedência',
                                                    default=1,
                                                    validators=[MinValueValidator(1), MaxValueValidator(6)],
                                                    help_text='Em quantos dias de antecência os peladeiros devem '
                                                              'marcar presença') # numbers of days before event

但是，我不知道如何在不要求用户每周添加相同信息的情况下重复此事件。我正在考虑以下算法：

def period(request):

    event_data = ModelPresenca.objects.all() # I have always only one object

    hour_timefield = datetime.strptime(h.hora_pelada, '%H:%M') # TimeField to string
    day = event_data.dia # Day of the event 
    b_days = event_data.dias_antecedencia # Number of days before event 

    week_d = week_day(day) # week_day is a function that converts day to int 
    event_d = event_day(week_d, hour_timefield) # event_day is a function that returns the date of full event occur
    conf_d = event_open_date(b_days, event_d) # Is a function that returns date of open to confirm


    n = datetime.now()
    t_str = '{}-{}-{}'.format(n.year, n.month, n.day)
    t_hour = ' {}:{}'.format(n.hour, n.minute)
    today = t_str + t_hour
    today = datetime.strptime(today, '%Y-%m-%d %H:%M')

    if (conf_d <= today) and (today < event_d):
        # Show formulary to confirm presence 
    else:
        # another thing, ie, hidden formulary        

我相信最后一个代码块必须重复，但我不知道这样做，我不知道这是否是最好的方法。如果有人可以帮助我，我将不胜感激。

Answer 1

您可以使用 Django Celery。 Celery 是一个基于分布式消息传递的异步任务队列/作业队列。它专注于实时操作，但也支持调度。

这里是 django celery 的第一步。您可以在模型中创建一个 post_save 方法，您将在其中运行一个异步任务，该任务将根据需要添加事件。此外，还有一个 Celery beat，可让您创建异步周期性任务。

例如：

@app.task()
def period():
    # Do your stuff here

然后在您的设置文件中添加您的芹菜节拍时间表：

CELERY_BEAT_SCHEDULE = {
 'add-periodic-events': { 
     'task': 'my_app.my_tasks.periodic', # this is a path to your file separated by '.'
     'schedule': crontab(minute=0, hour=0), # Execute daily at midnight.
    },    
}