django queryset相加和筛选

1、集合相加

a = {1,2,3}
b = {3,4,5}
print(type(a))
print(a|b)

2、queryset 符合条件的筛序

projects = Project_models.objects.filter(user=request.user).order_by('id')

projects = projects.filter(bad_numbers__gt=0).order_by('bad_numbers')

参考博客：https://www.cnblogs.com/yoyo008/p/9076200.html