return get_user_model().objects.get_or_create(username='deleted')[0] class MyModel(models.Model): user = models.ForeignKey( settings.AUTH_USER_MODEL, on_delete=models.SET(get_sentinel_user), ) 1. 2. 3. 4. 5. 6.
models.UserType.objects.create(caption='普通用户') models.UserType.objects.create(caption='超级管理员') # 创建用户信息表 user_info_dict_1 = {'user':'ales', 'email':'alex@qq.com', 'pwd':123, 'user_type': models.UserType.objects.get(nid=1), } user_info_dict_2 = {'user':'eric...
objects.get_or_create(username='deleted')[0] class MyModel(models.Model): user = models.ForeignKey( settings.AUTH_USER_MODEL, on_delete=models.SET(get_sentinel_user), ) DO_NOTHING 删除被参照表的某条表记录,不对参照表中同待删除记录存在外键关联的记录做任何处理。 参考链接: https://docs....
<QuerySet [<User: jason>, <User: egon>, <User: sean>, <User: admin>, <User: 你不行>]> 2.all() 查询所有数据 <QuerySet [<User: jason>, <User: egon>, <User: sean>, <User: admin>, <User: 你不行>]> 增 1.create() user_obj=models.User.objects.create(name=username,password...
models.User.objects.filter(username="alex",password="dsb")--过滤获取对象列表 结果:<QuerySet [<User: User object>]> <class 'django.db.models.query.QuerySet'> 1. 2. obj = models.Publisher.objects.create(name=pub_name)-- 创建 models.Publisher.objects.filter(pk=pk).delete() # 对象列表-...
user should be treated as active. ''Unselect this instead of deleting accounts.'),)date_joined=models.DateTimeField(_('date joined'),default=timezone.now)objects=UserManager()EMAIL_FIELD='email'USERNAME_FIELD='username'REQUIRED_FIELDS=['email']classMeta:verbose_name=_('user')verbose_name_...
py createsuperuser 输入用户名,输入密码 第三步:登录,录入书籍 -http://127.0.0.1:8000/admin/ 11-聚合查询 aggregate(*args, **kwargs) #结合聚合函数使用 from django.db.models import Avg, Max, Sum, Min, Max, Count (1)计算所有图书的总价格 res=models.Book.objects.all().aggregate(sum('price...
filter(username='elina').update(password="Luffy#21") # 单条修改obj = models.Account.objects.get(username='linux')obj.username = 'python'obj.save() # 批量删除models.User.objects.get(password='oldboy').delete() # 单条删除obj = models.User.objects.get(id=3)obj.delete() 数据返回后的展示...
user.username, tweet.message) Sometimes you only need the associated primary key value from the foreign key column. In this case, Peewee follows the convention established by Django, of allowing you to access the raw foreign key value by appending "_id" to the foreign key field’s name:...
export DATABASE_NAME="dor_services" export DATABASE_USERNAME=$DOR_SERVICES_DB_USER export DATABASE_HOSTNAME=$DOR_SERVICES_DB_PROD_HOST export DATABASE_PASSWORD=$DOR_SERVICES_DB_PROD_PWD Runbin/validate-cocina(NOTE:You likely want to run this in a screen session, as it can take many hours...