您如何看待该解决方案？
@receiver(post_save, sender=Article)
def generate_thumbnails(sender, instance=None, created=False, **kwargs):
if not instance:
return
if hasattr(instance, '_dirty'):
return
do_something()
try:
instance._dirty = True
instance.save()
finally:
del instance._dirty
您也可以创建装饰器
def prevent_recursion(func):
@wraps(func)
def no_recursion(sender, instance=None, **kwargs):
if not instance:
return
if hasattr(instance, '_dirty'):
return
func(sender, instance=instance, **kwargs)
try:
instance._dirty = True
instance.save()
finally:
del instance._dirty
return no_recursion
@receiver(post_save, sender=Article)
@prevent_recursion
def generate_thumbnails(sender, instance=None, created=False, **kwargs):
do_something()
你可以使用更新而不是保存在信号处理程序中
queryset.filter（pk = instance.pk）.update（....）
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