Django入门--简单的form验证

url

from django.contrib import admin
from  app01 import views
from django.conf.urls import url
from django.contrib import admin

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^login/',views.login)
]

html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <form method="POST" action="/login/">
        {% csrf_token %}
        <p>
            用户：<input type="text" name="username" />{{ obj.errors.username.0 }}
            </p>
        <p>
            密码：<input type="password" name="password" />{{ obj.errors.password.0 }}
        </p>
        <input type="submit" value="提交">
    </form>
</body>
</html>

View Code

view

from django.shortcuts import render,HttpResponse,redirect

# Create your views here.


from django.forms import Form
from django.forms import fields
class LoginForm(Form):
    #长度，是否为空的验证，正则验证:不能为空，长度6-18
    username = fields.CharField(max_length=18,
                                min_length=6,
                                required=True,
                                error_messages={
                                    'required':'用户名不能为空',
                                    'max_length':'用户名太长',
                                    'min_length':'用户名太短',
                                }
                                )
    #长度，是否为空的验证，正则验证：不能为空，长度大于5
    password = fields.CharField(min_length=5,required=True)

def login(request):
    if request.method == "GET":
        return render(request,'login.html')
    else:
        obj = LoginForm(request.POST)
        if obj.is_valid():
            print(obj.cleaned_data) ###字典类型
            return redirect('https://www.baidu.com')
        else:
            return render(request,'login.html',{'obj':obj})

View Code