标签:let dong end 字段 password not int agg long
def login(request):
增加用户记录 使用save()方法来增加记录
username = UserInfo(username=‘tom‘, password=‘123‘)
username.save()
user = {‘username‘: ‘wangwang‘, ‘password‘: ‘1234‘}
UserInfo.objects.create(**user)
UserInfo.objects.create(username=‘wangwei‘, password=‘111‘)
批量插入 嵌套create方法在shell中执行
UserInfo.objects.create(UserInfo.objects.create(username=‘wangjian‘, password=‘222‘),
UserInfo.objects.create(username=‘wanghui‘, password=‘222‘),
UserInfo.objects.create(username=‘wanglong‘, password=‘222‘))
UserInfo.objects.bulk_create([UserInfo(username=‘huihui‘, password=‘222‘),
UserInfo(username=‘dongmao‘, password=‘222‘),
UserInfo(username=‘zhouzhou‘, password=‘222‘),
UserInfo(username=‘dongmao1‘, password=‘222‘),
UserInfo(username=‘zhouzhou1‘, password=‘222‘)
])
user = UserInfo.objects.get(userid=1)
print(user)
user.password = ‘3333‘
user.save()
user = UserInfo.objects.get(userid=2)
print(user, type(user))
if user:
user.delete()
users = UserInfo.objects.filter(userid__gte=2)
print(users)
users.delete()
firstname = ["张", "李", "郑", "吴", "赵", "周", "王"]
lastname = ["建军", "建辉", "建业", "建党", "建国"]
users = []
for name in range(100):
username = firstname[randint(0, 6)] + lastname[randint(0, 4)]+str(randint(0, 10000))
users.append(UserInfo(username=username, password=str(randint(11111, 999999))))
UserInfo.objects.bulk_create(users)
return HttpResponse("批量查询")
def query(request):
# all过滤器查询所有数据
users = UserInfo.objects.all()
print(users)
return render(request, ‘index.html‘, locals())
# filter 过滤器 条件查询
users = UserInfo.objects.filter(userid__gt=100).filter(userid__lt=200)
print(users)
return render(request, ‘index.html‘, locals())
# 数据查询
user = UserInfo()
user.username = ‘王辉‘
user.password = ‘2222222‘
user.save()
return HttpResponse("CURD")
[:number]切片取第前number条记录
def order(request):
data = UserInfo.objects.order_by(‘username‘)
for user in data:
print(user.username)
return HttpResponse("排序")
def curd(request):
data = UserInfo.objects.all().values(‘username‘)
for user in data:
print(user)
def distinctview(request):
data = UserInfo.objects.all().values("password").distinct()[:10]
print(data)
def fx(request):
data = UserInfo.objects.order_by(‘userid‘).reverse()
print(data)
return HttpResponse("curd")
def process_query(request):
get方法只能返回一条记录
user = UserInfo.objects.get(userid=100)
print("111")
print(user)
user = UserInfo.objects.first()
print(user)
user = UserInfo.objects.last()
print(user)
num = UserInfo.objects.filter(userid__gte=17).count()
print(num)
flag = UserInfo.objects.filter(userid__lt=17).all().exists()
print(flag)
return HttpResponse("非过滤器查询方法")
"""
关系运算符的表达式的使用
>= 字段__get=num
> 字段__gt=num
< 字段__lt=num
<= 字段__lte=num
== 字段=num
!= 字段__ne=num
"""
user = UserInfo.objects.filter(userid__lt=200, userid__gte=100)
print(user)
data = UserInfo.objects.filter(userid__in=[17, 18, 19])
print(data)
data = UserInfo.objects.filter(username__isnull=True)
print(data)
# __startwith以什么字符串开头的所有字段
data = UserInfo.objects.filter(username__startswith=‘张‘)
for user in data:
print(user)
data = UserInfo.objects.filter(username__regex=r‘3$‘)
print(data)
data = UserInfo.objects.filter(regtime__year=2021)
print(data)
return HttpResponse("多条件的逻辑与查询")
def group(request):
#查询最大userid
userid = UserInfo.objects.aggregate(Max(‘userid‘))
print(userid)
# 查询最小值userid
userid = UserInfo.objects.aggregate(Min(‘userid‘))
print(userid)
# 统计分组查询
data = UserInfo.objects.values(‘username‘).annotate(Count(‘userid‘)).filter(userid=30)
print(data)
return HttpResponse("统计查询")
标签:let dong end 字段 password not int agg long
原文地址:https://www.cnblogs.com/hotboy393/p/14671889.html