Django 08.17

1.模型:

自关联

• 多对多关联

  class User(models.Model):
      name = models.CharField(max_length=32)
      gender_list = [
          (1,"男"),
          (2,"女"),
      ]
      gender = models.IntegerField(choices=gender_list,default=1)
      m =models.ManyToManyField('User')
      
  def test(request):
  
      ### 自关联
      '''
      from_user_id : 男生的id
      to_user_id: 女生id
      '''
      #### 查询和zekai约会的姑娘
      res = models.User.objects.filter(name='zekai', gender=1).first()
      #print(res) ### obj
      objs = res.m.all()
      '''
         1. select * from app01_user_m where  from_user_id = 1  ### to_user_id=[3,4]
         2. select * from app01_user where id in (3,4)
      '''
      for obj in objs:
          print(obj.name)
  
      #### 查询和cuihua约会的男生
      res = models.User.objects.filter(name='cuihua', gender=2).first()
      objs = res.user_set.all()
      '''
          1. select * from app01_user_m where  to_user_id = 3  ### from_user_id=[1,2]
          2. select * from app01_user where id in (1,2) 
      '''
      for obj in objs:
          print(obj.name)
  
  
      return HttpResponse('ok')
  

• 一对多关联django_admin_log

  class article(models.Model):
      title = models.TextField()
  
  class Comment(models.Model):
      content = models.CharField(max_length=255)
      article = models.ForeignKey("article")
      reply = models.ForeignKey("Comment",default=0)
  

auth模块:

django内置的模块

auth_user表记录的添加

• 创建超级用户(不可手动插入，因为密码是加密的)
• 简单使用auth认证

from django.contrib import auth
def login(request):
  if request.method == 'POST':
    name = request.POST.get('name')
    pwd = request.POST.get('pwd')
    user = auth.authenticate(request,username=name,password=pwd)
    # 类似于user=models.User.objects.filter(username=name,password=pwd).first()
    if user:
      return redirect('/home/')
  return render(request,'login.html')

def test1(request):
    if request.user.is_authenticated:
        return HttpResponse("OK")
    else:
        return render(request,"login.html")

from django.contrib.auth.decorators import login_required
@login_required()
def test1(request):
    return HttpResponse("OK")

# 可以在配置文件中指定auth校验登陆不合法统一跳转到某个路径
LOGIN_URL = '/login/'  # 既可以局部配置，也可以全局配置

### auth 模块注册
from django.contrib.auth.models import User
def register(request):
    if request.method  == 'GET':
        return render(request, 'register.html')
    else:
        username = request.POST.get('username')
        pwd = request.POST.get('pwd')

        # User.objects.create_superuser(username=username, password=pwd, email='111@qq.com')
        User.objects.create_user(username=username, password=pwd)
    return HttpResponse('ok')

• 注销

  auth.logout(request)
  # 等价于删除session数据
  request.session.flush()
  

• 校验密码，修改密码

  ### 修改密码
  def modify(request):
  
      if request.method=='GET':
  
          return render(request, 'modify.html')
      else:
          old_pwd = request.POST.get('oldpwd')
          new_pwd = request.POST.get('newpwd')
  
          res = request.user.check_password(old_pwd)
          if res:
              request.user.set_password(new_pwd)
              request.user.save()
              return HttpResponse('ok')
          else:
              return render(request, 'modify.html')
  

自定义模型表应用auth功能

如何扩张auth_user表？

• 一对一关联(不推荐)

  from django.contrib.auth.models import User
  
  class UserDetail(models.Models):
    phone = models.CharField(max_length=11)
    user = models.OnoToOneField(to=User)
  

• 面向对象的继承

  from django.contrib.auth.models import User,AbstractUser
  class UserInfo(AbstractUser):
    phone = models.CharField(max_length=32)
  
  # 需要在配置文件中，指定我不再使用默认的auth_user表而是使用我自己创建的Userinfo表
  AUTH_USER_MODEL = "app名.models里面对应的模型表名"
  """
  自定义认证系统默认使用的数据表之后，我们就可以像使用默认的auth_user表那样使用我们的UserInfo表了。
  库里面也没有auth_user表了，原来auth表的操作方法，现在全部用自定义的表均可实现
  """
  

layUI的使用: