Python 检查对象是否为queryset结果的外键
我有一组对象存储在一个名为Python 检查对象是否为queryset结果的外键,python,django,Python,Django,我有一组对象存储在一个名为subs的变量中。订阅的列是外来对象 有没有办法以更简单的方式检查相关的_对象是否在此列表中: def check_subscription_status(user, related_object): subs = get_user_subscriptions(user) # returns filter queryset subscribed = False for s in subs: if s.subscribed_to =
subs
的变量中。订阅的列是外来对象
有没有办法以更简单的方式检查相关的_对象是否在此列表中:
def check_subscription_status(user, related_object):
subs = get_user_subscriptions(user) # returns filter queryset
subscribed = False
for s in subs:
if s.subscribed_to == related_object: #related object is the potential match
subscribed = True
break
return subscribed
ETA:更好的方法:
return subs.filter(subscribed_to=related_object).count() > 0
ETA:更好的方法:
return subs.filter(subscribed_to=related_object).count() > 0
您的想法是正确的,但为了使其与方法兼容,返回应该是return subs.filter(subscribed\u to=related\u object).count()
谢谢。。另一个快速评论是s.subscribed\u for s in subs抛出了一个无效的语法错误。您的想法是正确的,但为了使其与方法兼容,返回应该是return subs.filter(subscribed\u to=related\u object).count()
谢谢。。另一个快速评论是,subs中s的s.subscribed\u抛出了一个无效的语法错误。