- 返回查询结果集
all() # 获取所有数据,对应SQL:select * from User User.objects.all() filter(**kwargs) 返回QuerySet包含与给定查找参数匹配的新查询集。 #等价sql:select * from User User.objects.filter() #等价sql:select * from User where uname = 'admin' User.objects.filter(uname='admin') #等级sql:select * from User where uid > 1 and type = 2 User.objects.filter(uid__gt=1,type=2) #链式调⽤,等价于User.objects.filter(uid__gt=1,type=2) User.objects.filter(uid__gt=1).filter(type=2) exclude(**kwargs) # 不匹配,对应SQL:select * from User where name != 'admin' User.objects.exclude(name='admin') order_by(*fields) 参数是字段名,可以有多个字段名,默认是升序。 如果要按某个字段降序,在字段名前加'-': "-uid"表示按uid降序排列 #按uid升序排列 等价于 order by uid User.objects().order_by('uid') #按uid降序排列 等价于 order by uid desc User.objects.order_by('-uid') #多列排序 等价于 order by password,uid desc User.objects.order_by('password','-uid') values() #返回所有字段 User.objects.values() #返回数据: [{'uid': 2, 'uname': '⼩甜甜', 'password': '59f2443a4317918ce29ad28a14e1bdb7'type': '普通⽤户', 'regtime': None, 'ip': None, 'allowed': '允许登录', 'email': None, None},...] #返回指定字段 User.objects.values('uname','password') [{'uname': '⼩甜甜', 'password': '59f2443a4317918ce29ad28a14e1bdb7'},...] reverse() User.objects.order_by('id').reverse() 降序 User.objects.order_by('-id').reverse() 升序 distinct()去重 User.objects.values('password').distinct()
Django—模型—数据查询(返回查询结果集)
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