用Django内置form组件实现注册

HTML页面代码块：

"en">

    "UTF-8">

    "stylesheet" href="/static/bootstrap/css/bootstrap.min.css">
    



class="container">
    
class="row">
        
class="col-md-6 col-md-offset-3">
            
"/index/" method="post" novalidate>
                {% csrf_token %}
                
class="form-group {% if reg.user.errors.0 %} has-error {% endif %}">
                    { { reg.user.label }}
                    { { reg.user }}
                    class="help-block" id="s1">{ { reg.user.errors.0 }}
                
                
class="form-group {% if reg.psd.errors.0 %} has-error {% endif %}">
                    { { reg.psd.label }}
                    { { reg.psd }}
                    class="help-block">{ { reg.psd.errors.0 }}
                
                
class="form-group {% if reg.re_pwd.errors.0 %} has-error {% endif %}">
                    { { reg.re_pwd.label }}
                    { { reg.re_pwd }}
                    class="help-block">{ { reg.re_pwd.errors.0 }}
                
                
class="form-group {% if reg.email.errors.0 %} has-error {% endif %}">
                    { { reg.email.label }}
                    { { reg.email }}
                    class="help-block">{ { reg.email.errors.0 }}
                
                
class="form-group {% if reg.mobile.errors.0 %} has-error {% endif %}">
                    { { reg.mobile.label }}
                    { { reg.mobile }}
                    class="help-block">{ { reg.mobile.errors.0 }}
                

                
class="form-group {% if reg.city.errors.0 %} has-error {% endif %}">
                    { { reg.city.label }}
                    { { reg.city }}
                    class="help-block">{ { reg.city.errors.0 }}
                
                
class="form-group">
                    "submit" class="btn btn-success">登录
                

            
        
    






   

views代码块的逻辑处理：>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

from django.shortcuts import render,redirect,HttpResponse

# Create your views here.

from appfind import models

def check(request):
    if request.method=="POST":
        user=request.POST.get('user')
        user_obj=models.UserInfo.objects.filter(user=user)
        if user_obj:
            msg='用户名已存在。请更换！'
        else:
            msg=''
        return HttpResponse(msg)

from django import forms
from django.forms import widgets
from django.core.validators import RegexValidator
from  django.core.exceptions import ValidationError
class RegForm(forms.Form):  #利用RegForm去生成HTML字段标签
    user=forms.CharField(max_length=32,label='用户名',
                         error_messages={ "required": "该字段不能为空",},
                         widget=widgets.TextInput(attrs={ 'class':'form-control'}))
    psd=forms.CharField(label='密码',min_length=6,max_length=30,
                        widget=widgets.PasswordInput(attrs={ 'class':'form-control'},render_value=True),
                        error_messages={ 'min_length':'密码不能少于6位',
                                        "max_length": "密码最长30位！",
                                        "required": "该字段不能为空",})
    re_pwd = forms.CharField(label='确认密码', min_length=6, max_length=30,
                             widget=widgets.PasswordInput(attrs={ 'class': 'form-control'}, render_value=True),
                             error_messages={ 'min_length': '密码不能少于6位',
                                             "max_length": "密码最长30位！",
                                             "required": "该字段不能为空", })
    email=forms.EmailField( label="邮箱",
                            widget=widgets.EmailInput(attrs={ "class": "form-control"}),
                            error_messages={
                                "required": "该字段不能为空",
                            })
    mobile = forms.CharField(label="手机",
                             validators=[
                                 RegexValidator(r'^[0-9]+$','手机号码必须是数字'),
                                 RegexValidator(r'^1[3-8][0-9]{9}$','手机格式有误')
                             ],
                             widget=widgets.TextInput(attrs={ "class": "form-control"}),
                             error_messages={
                                 "required": "该字段不能为空",
                             })
    def clean_user(self):  #clean_user  user 就是要检验的字段
        value=self.cleaned_data.get('user')
        if "独裁" in value:
            raise ValidationError("不符合社会主义核心价值观！")
        return value

    def clean(self):   #重写父类的clean方法
        # 此时 通过检验的字段的数据都保存在 self.cleaned_data
        psd=self.cleaned_data.get('psd')
        re_pwd=self.cleaned_data.get('re_pwd')
        if psd != re_pwd:
            self.add_error('re_pwd',ValidationError('两次密码不一致'))
            raise ValidationError('两次密码不一致')
        return self.cleaned_data

    city=forms.ChoiceField(
        choices=models.City.objects.all().values_list('id','name'),
        label='城市',   
        initial=1,
        widget=forms.widgets.Select
    )

    def __init__(self,*args,**kwargs):   #重写父类的__init__方法
        super().__init__(*args,**kwargs)  #每次初始化加载插件就重新再数据库里取值
        self.fields['city'].widget.choices=models.City.objects.all().values_list('id','name')

def index(request):
    regform=RegForm()           #实例化一个RegForm对象
    if request.method=="POST":
        regform = RegForm(request.POST)  #获取对象
        if regform.is_valid():           #校验对象的所有字段
            del regform.cleaned_data['re_pwd']     #删除部分用户表不需要存储的字段
            del regform.cleaned_data['city']
            models.UserInfo.objects.create(**regform.cleaned_data)  #数据库添加用户数据
            return HttpResponse('恭喜，注册成功！')

    return render(request,'index.html',{ 'reg':regform})
    #get请求直接把RegForm对象传给页面