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 = (
        ("1","好评"),
        ("2","中评"),
        ("3","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>