QuerySet和对象的例子 个人记录

import os
if __name__ == "__main__":
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "auth_demo.settings")
    import django
    django.setup()
    from app01 import models
    a1 = models.Article.objects.first()  #为对象
    print(type(a1))

    a2 = models.Article.objects.all() #为querySet
    print(type(a2))

    for a3 in a2:
        print(type(a3))  #单个对象
        print(a3.user.avatar)

    a4 = models.Article.objects.filter(pk=1)  #querySet
    print(type(a4))

    a5 = a4.values("user__avatar") #querySet
    print(a5, type(a5))
    for i in a5:
        print(i)

    a6 = models.Article.objects.values("user__avatar") #querySet
　　 #<QuerySet [{'user__avatar': 'avatars/95449993_9UqVsuI.jpg'}, {'user__avatar': 'avatars/95449993_9UqVsuI.jpg'}, {'user__avatar': 'avatars/95449993.jpg'}]>
    print("a6: %s" %(a6))
    for i in a6:
        print(i)