如何在Django模型中使用芹菜节拍为每个对象创建单独的任务

Question

假设我们具有以下模型字段：

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假设我们有2个项目对象：

class Project(models.Model):
    project_name = models.CharField(max_length=200,unique=True)
    project_scan = models.IntegerField()  ### Scan interval
    project_status = models.BooleanField() ### To Enable "Scan" or Disable "Scan" Tasks

Tasks.py

1. Project(project_name='test1',project_scan=5) ### Scan `test1` every `5` hour
2. Project(project_name='test2',project_scan=10) ### Scan `test2` every `10` hour

我的问题： 如何根据给定的@task(name='project_tasks') def Project_Tasks(): get_all_projects = Project.objects.all() for each_project in get_all_project: if each_project.project_status == True: ### Checking if it "Scan" is allowed. get_interval = each_project.project_scan get_name = each_project.project_name print(get_name) 间隔在每个对象上运行任务？ ，由于Celery beat将Tasks名称作为参数来执行扫描，如下所示： project_scan

如何为每个项目任务创建单独的实例？

我尝试在models.py中创建intervalSchedule字段，但没有成功：

PeriodicTask.objects.create(interval=given_interval, name='I dont know', task='project_tasks', )

Answer 1

您可以添加使用信号：

from django.db.models.signals import post_save
from django.dispatch import receiver

from django_celery_beat.models import PeriodicTask, IntervalSchedule


class Project(models.Model):
    project_name = models.CharField(max_length=200,unique=True)
    project_scan = models.IntegerField()  
    project_status = models.BooleanField()


    def set_periodic_task(self, task_name):
        schedule = self.get_or_create_interval()
        PeriodicTask.objects.create(
            interval=schedule, 
            name=f'{self.project_name}-{self.id}', 
            task=task_name,
        )

    def get_or_create_interval(self):
        schedule, created = IntervalSchedule.objects.get_or_create(
            every=self.project_scan,
            period=IntervalSchedule.HOURS,
        )
        return schedule

    def get_periodic_task(self, task_name):
        interval = self.get_or_create_interval()
        periodic_task = PeriodicTask.objects.get(
            interval=interval, 
            name=f'{self.project_name}-{self.id}', 
            task=task_name,
        )
        return periodic_task

    def sync_disable_enable_task(self, task_name):
        periodic_task = self.get_periodic_task(task_name)
        periodic_task.enabled = self.project_status
        periodic_task.save()


@receiver(post_save, sender=Project)
def set_or_sync_periodic_task(sender, instance=None, created=False, **kwargs):
    if created:
        instance.set_periodic_task(task_name='project_tasks')
    else:
        instance.sync_disable_enable_task(task_name='project_tasks')

您所拥有的： 创建新的Project实例时，将使用方法set_periodic_task保存新的定期任务。如果您想执行实例的disable或enable周期性任务，只需更改project_status状态并保存。它将触发sync_disable_enable_task方法来启用或禁用。

如果您想传递参数，可以执行以下操作：

 PeriodicTask.objects.create(
     interval=schedule,
     name=f'{self.project_name}-{self.id}', 
     task='proj.tasks.import_contacts',
     args=json.dumps(['arg1', 'arg2']),
     kwargs=json.dumps({
        'some_kwarg': '123,
     }),
)