Django中用 form 实现登录注册

1、forms模块
将Models和Forms结合到一起使用，将Forms中的类和Models中的类关联到一起，实现属性的共享
1、在forms.py中创建class，继承自forms.ModelForm
2、创建内部类：Meta，关联Form和Model

属性：
1、model：指定要关联的Model类
2、fields：指定从Model中取哪些字段生成控件
1、取值 "__all__",全部的属性都要生成控件
2、取值 列表或元组，声明允许生成控件的属性名称
3、labels：每个属性所关联的label，取值为字典
labels = {
"属性名1","文本1",
"属性名2","文本2"
}

url:

 urlpatterns = [
     url(r'^01_request/$',request_views),
     url(r'^02_meta/$',meta_views),
     url(r'^03_form/$',form_views),
     url(r'^04_get_post/$',get_post_views),
     url(r'^05_remark/$',remark_views),

     url(r'^register/$',register_views),
     url(r'^login/$',login_views),
     url(r'^login_auto/$',login_auto_views),

     url(r'01_login',login_form_views),
     url(r'01_regiter',regiter_form_views),
 ]

models.py

 from django.db import models

 class Users(models.Model):
     uname = models.CharField(max_length=30)
     upwd = models.CharField(max_length=30)
     uage = models.IntegerField()
     uemail = models.EmailField()

     def __str__(self):
         return self.uname

views.py：

 from django.shortcuts import render,HttpResponse
 from django.views.decorators.csrf import csrf_protect

 def request_views(request):
     # request,类型就是HttpRequest
     # request 封装的是与所有请求相关的内容
     # print(dir(request))

     scheme = request.scheme    #请求方案(协议)
     body = request.body        #请求主体
     path = request.path        #请求路径
     host = request.get_host()  #请求主机地址  /  域名
     method = request.method    #请求方法
     get = request.GET          #get的请求数据
     post = request.POST        #get的请求数据
     cookies = request.COOKIES  #cookie中的数据
     meta = request.META        #请求中的元数据
     return render(request,"01_request.html",locals())

 def meta_views(request):
     print(request.META["HTTP_REFERER"])
     return HttpResponse("request ok")

 def form_views(request):
     return render(request,"03_form.html")

 @csrf_protect
 def get_post_views(request):
     if request.method == "GET":
         name = request.GET.get("uname")
         pwd = request.GET.get("upwd")
         return HttpResponse("用户名："+name+"，用户密码："+pwd)
     else:
         name = request.POST["uname"]
         pwd = request.POST["upwd"]
         return HttpResponse ("用户名：" + name + "，用户密码：" + pwd)

 from .forms import *
 def remark_views(request):
     if request.method == "POST":
         subject = request.POST["subject"]
         return HttpResponse(subject)
     form = RemarkForm()
     return render(request,"05_remark.html",locals())

 from .form import *
 def login_views(request):
     if request.method == "GET":
         forms = LoginForm()
         return render(request,"login.html",locals())
     else:
         uname = request.POST["uname"]
         upwd = request.POST["upwd"]
         user = Users.objects.get(uname=uname)
         if user:
             if user.upwd == upwd:
                 return HttpResponse("验证通过")
             else:
                 errmsg = "密码"
                 return render (request, "login.html", locals ())
         else:
             errmsg = "用户名错误"
             return render(request,"login.html",locals())

 def login_auto_views(request):
     if request.method == "GET":
         form = LoginForm()
         return render(request,"login.html",locals())
     else:
         form = LoginForm(request.POST)
         if form.is_valid():
             data = form.cleaned_data
             print(data)
             uname = data["uname"]
             print(uname)
             upwd = data["upwd"]
             user = Users.objects.filter(uname=uname).first()
             if user:
                 if user.upwd == upwd:
                     return HttpResponse("验证通过")
                 else:
                     errmsg = "密码错误"
                     return render (request,"login.html",locals())
             else:
                 errmsg = "用户名错误"
                 return render(request,"login.html",locals())
         return HttpResponse("信息错误")

 def register_views(request):
     if request.method == "GET":
         forms = RegisterForm()
         return render(request,"register.html",locals())
     else:
         form = RegisterForm(request.POST)
         if form.is_valid():
             data = form.cleaned_data
             uname = data["uname"]
             upwd = data["upwd"]
             uage = data["uage"]
             uemail = data["uemail"]
             user = Users.objects.filter(uname=uname).first()
             if user:
                 errmsg = "用户名已存在"
                 return render(request, "register.html", locals())
             else:
                 user = Users (uname=uname, upwd=upwd, uage=uage, uemail=uemail)
                 user.save ()

                 Users(**data).save()
                 return HttpResponse("注册成功")

 def login_form_views(request):
     if request.method == "GET":
         form = UserLoginForm()
         return render(request,"login_form.html",locals())
     else:
         uname = request.POST["uname"]
         upwd = request.POST["upwd"]
         user = Users.objects.get(uname=uname)
         if user:
             if user.upwd == upwd:
                 return HttpResponse("验证通过")
             else:
                 errmsg = "密码"
                 return render (request, "login.html", locals ())
         else:
             errmsg = "用户名错误"
             return render(request,"login.html",locals())

 def regiter_form_views(request):
     if request.method == "GET":
         form = UserRegisterForm()
         return render(request,"register_form.html",locals())
     else:
         form = RegisterForm(request.POST)
         if form.is_valid():
             data = form.cleaned_data
             uname = data["uname"]
             upwd = data["upwd"]
             uage = data["uage"]
             uemail = data["uemail"]
             user = Users.objects.filter(uname=uname).first()
             if user:
                 errmsg = "用户名已存在"
                 return render(request, "register.html", locals())
             else:
                 user = Users (uname=uname, upwd=upwd, uage=uage, uemail=uemail)
                 user.save ()

                 Users(**data).save()
                 return HttpResponse("注册成功")

forms.py

 from django import forms

 # 表示评论内容表单控件
 # 评论标题  文本框
 # 评论人邮件   type='Email'
 # 题目  Select
 # isSave  type="checkbox"
 class RemarkForm(forms.Form):
     subject = forms.CharField(label="标题")
     email = forms.EmailField(label="邮箱")
     message = forms.CharField(label="内容",widget=forms.Textarea)
     topic_choice = (
         ("","好评"),
         ("","中评"),
         ("","差评")
     )
     topic = forms.ChoiceField(label="评价",choices=topic_choice)
     issave = forms.BooleanField(label="是否保存")

form.py

 from django import forms

 class LoginForm(forms.Form):
     uname = forms.CharField(label="用户名：")
     upwd = forms.CharField(label="用户密码：",widget=forms.PasswordInput)

 class RegisterForm(forms.Form):
     uname = forms.CharField(label="用户名称：",max_length=18)
     upwd = forms.CharField(label="用户密码：",widget=forms.PasswordInput)
     uage = forms.IntegerField(label="用户年龄：")
     uemail = forms.EmailField(label="用户邮件：")

 from .models import *
 # 创建class表示登录的表单，要关联Users实体类
 class UserLoginForm(forms.ModelForm):
     # 创建内部类Meta，关联Model
     class Meta:
         # 1、指定关联的Model
         model = Users
         # 2、指定要生成的控件
         fields = ["uname","upwd"]
         # 3、指定每个控件对应的label
         labels = {
             "uname":"用户名称",
             "upwd":"用户密码"
         }
 class UserRegisterForm(forms.ModelForm):
     # 创建内部类Meta，关联Model
     class Meta:
         # 1、指定关联的Model
         model = Users
         # 2、指定要生成的控件
         fields = "__all__"
         # 3、指定每个控件对应的label
         labels = {
             "uname":"用户名称",
             "upwd":"用户密码",
             "uage":"用户年龄",
             "uemail":"用户邮箱"
         }

login.html：

 <!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8">
     <title>用户登录</title>
 </head>
 <body>
     <p>{{ errmsg }}</p>
     <form action="/login/" method="post">
      {% csrf_token %}
         {% for form in forms %}
             <p>{{ form.label }}{{ form }}</p>
         {% endfor %}
         <p><input type="submit" value="登录"></p>
     </form>

 ==========================================================
     <p>{{ errmsg }}</p>
     <form action="/login_auto/" method="post">
      {% csrf_token %}
         {% for form in forms %}
             <p>{{ form.label }}{{ form }}</p>
         {% endfor %}
         <p><input type="submit" value="登录"></p>
     </form>
 </body>
 </html>

register.html

 <!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8">
     <title>用户登录</title>
 </head>
 <body>
     <p>{{ errmsg }}</p>
     <form action="/register/" method="post">
      {% csrf_token %}
         {% for form in forms %}
             <p>{{ form.label }}{{ form }}</p>
         {% endfor %}
         <p><input type="submit" value="注册"></p>
     </form>
 </body>
 </html>

login_form.html：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
     <p>{{ errmsg }}</p>
    <form action="/01_login/" method="post">
        {% csrf_token %}
            {{ form.as_p }}
        <p><input type="submit" value="登录"></p>
    </form>

</body>
</html>

register_form.html：

 <!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8">
     <title>Title</title>
 </head>
 <body>
      <p>{{ errmsg }}</p>
     <form action="/01_regiter/" method="post">
         {% csrf_token %}
             {{ form.as_p }}
         <p><input type="submit" value="登录"></p>
     </form>

 </body>
 </html>