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增删改
# models.py from django.db import models # Create your models here. # 自定义模型必须继承Model class User(models.Model): # 字段名:不能是python的关键字;不能使用连续的下划线; #db_column:数据库表中的字段名称 uid = models.AutoField(primary_key=True) # CharField类型必须指明长度max_length username = models.CharField(max_length=30,unique=True) password = models.CharField(max_length=128) regtime = models.DateTimeField(auto_now_add=True) class Meta: # 元数据,模型本身的信息 #默认表名:应用名_模型名 db_table = 'user' # 表名 ordering = ['username'] # 排序
# views.py from random import randint from django.http import HttpResponse from django.shortcuts import render # Create your views here. from App.models import User def handle_data(request): # 增加记录 # user = User(username='tom',password='123') # user.save() # 便利方法 # user = {'username':'tom1','password':'33334'} # User.objects.create(**user) # 批量创建 # first = ["张","李","赵","周","吴","郑","王"] # lastname = ['三','春花','翠花','卫国','二狗'] # users = [] # for name in range(100): # username = first[randint(0,6)] + lastname[randint(0,4)]+str(randint(0,10000)) # users.append(User(username=username,password=str(randint(11111,999999)))) # User.objects.bulk_create(users) # User.objects.bulk_create([User(username='test1'),User(username='test2')]) #修改 # user = User.objects.get(pk=1) # user.password = '3333' # user.save() #删除 # pk表示主键 # try: # user = User.objects.get(uid=1) # print(user,type(user)) # if user: # user.delete() # except Exception as e: # print(e) #删除多条记录 # users = User.objects.filter(uid__gte=2) # print(users) # users.delete() return HttpResponse("增删改") def find_data(request): # all 过滤器 查询所有数据 # users = User.objects.all() # print(data) #filter 过滤器 where # select * from user where uid=5 # users = User.objects.filter(uid=5) # select * from user where uid>5 # 过滤器可以串联调用 users = User.objects.filter(uid__gt=5).filter(uid__lt=50) print(users) # return HttpResponse("query") return render(request,'list.html',locals())
# urls.py from django.urls import path, include from App import views urlpatterns = [ # 数据的增、删、改 path('',views.handle_data, name='data'), path('query/',views.find_data, name='find'), ]
Django—模型—增删改
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转载自blog.csdn.net/piduocheng0577/article/details/105001797
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