Django的form组件——正则校验 

from django.contrib import admin
from django.urls import path
from app01 import views


urlpatterns = [
    path('admin/', admin.site.urls),
    path('test/',views.test)
]

　　

from django.shortcuts import render,HttpResponse
from django import forms
from django.core.validators import RegexValidator    #导入正则校验器RegexValidator


class UserInfo(forms.Form):

    username = forms.CharField(
        label='用户名',
        min_length=6,
        required=True,

        validators=[   #自定义校验规则
            RegexValidator(r'^a', '必须以a开头'),    #第一个参数定义正则规则，第二个参数为错误信息
            # RegexValidator(r'b$', '必须以b结尾'),
            # 可以写多个 ...
        ],

        error_messages={
            'required': '不能为空'
        },
    )

    password = forms.CharField(
        label='密码',
        widget=forms.widgets.PasswordInput(render_value=True)
    )



def test(request):
    if request.method == 'GET':
        u_obj = UserInfo()
        return render(request, 'test.html', {'u_obj': u_obj})
    else:
        u_obj = UserInfo(request.POST)
        if u_obj.is_valid():
            print(u_obj.cleaned_data)
            return HttpResponse('检验通过')
        else:
            print(u_obj.errors)
            return render(request, 'test.html', {'u_obj': u_obj})

　　

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>test</title>
    <style>

    </style>
</head>
<body>
    <form action="" method="post" novalidate>
        {% csrf_token %}
        <div>
            {{ u_obj.username.label }}:{{ u_obj.username }} {{ u_obj.username.errors.0 }}
        </div>
        <div>
            {{ u_obj.password.label }}:{{ u_obj.password }} {{ u_obj.password.errors.0 }}
        </div>


        <div>
            <input type="submit" value="提交">
        </div>
    </form>


</body>
</html>

　　

posted @ 2021-09-09 11:18  映辉  阅读(225)  评论(0)    收藏  举报