Django基于form组件实现注册校验

时间：2021-01-10 02:45:52

一 基本流程

1 创建form组件对应的类，比如LoginForm

2 前端的三种渲染方式：

渲染方式三种：

1

<form action="" novalidate method="post">

    {% csrf_token %}

    {{ form_obj.as_p }}

    <input type="submit">

</form>

2

<form action="" novalidate method="post">

    {% csrf_token %}

    <div>

        <label for="">用户名</label>

        {{ form_obj.user }} <span>{{ form_obj.errors.user.0 }}</span>

    </div>

    <div>

        <label for="">密码</label>

        {{ form_obj.pwd }}<span>{{ form_obj.errors.pwd.0 }}</span>

    </div>

    <input type="submit">

</form>

3

<form action="" novalidate method="post">

    {% csrf_token %}

    {% for field in form_obj %}

        <div>

            <label for="">{{ field.label }}</label>

            {{ field }}

        </div>

    {% endfor %}

    <input type="submit">

</form>

　　

二 注册校验

from django.core.exceptions import NON_FIELD_ERRORS, ValidationError
from django.forms import widgets

 class RegForm(forms.Form):

     user = forms.CharField(max_length=18, min_length=3,

                            error_messages={

                                'required': '不能为空',

                                'min_length': 'too short',

                                'max_length': "too long"

                            })

     pwd = forms.CharField(max_length=32, min_length=3,

                           error_messages={

                               'max_length': "too long",

                               'required': '不能为空',

                               'min_length': 'too short',

                           },

                           widget=widgets.PasswordInput(attrs={}))

     repeat_pwd = forms.CharField(label='确认密码',

                                  max_length=32,

                                  error_messages={},

                                  widget=widgets.PasswordInput(attrs={}))

     email = forms.EmailField(

         error_messages={

             "invalid": '格式错误'

         }

     )

     tel = forms.CharField()

     def clean_user(self):

         val = self.cleaned_data.get("user")

         ret = Userinfo.objects.filter(name=val)

         if not ret:

             return val

         else:

             raise ValidationError("该用户已经注册")

     def clean_tel(self):

         val = self.cleaned_data.get('tel')

         import re

         ret = re.search("1[356789]\d{9}$", val)

         if ret:

             return val

         else:

             raise ValidationError("手机号格式错误")

     def clean(self):

         pwd = self.cleaned_data.get('pwd')

         repeat_pwd = self.cleaned_data.get('repeat_pwd')

         if pwd == repeat_pwd:

             return self.cleaned_data

         else:

             raise ValidationError("两次密码不一致")

forms

 def reg(request):

     if request.method == 'POST':

         reg_form = RegForm(request.POST)

         if reg_form.is_valid():

             print(reg_form.cleaned_data)  # dict

             name = reg_form.cleaned_data.get("user")

             pwd = reg_form.cleaned_data.get("pwd")

             Userinfo.objects.create(name=name, pwd=pwd)

             return redirect('/login/')  # 注册成功去登录

         else:

             all_error = reg_form.errors.get("__all__")

             return render(request, 'reg.html', locals())

     reg_form = RegForm()

     return render(request, 'reg.html', {'reg_form': reg_form})

views

 <body>

 <h3>注册页面</h3>

 <form action="" novalidate method="post">

     {% csrf_token %}

     {% for field in reg_form %}

         <div>

             <label for="">{{ field.label }}</label>

             {{ field }}<span>{{ field.errors.0 }}</span>

             {% if field.label == '确认密码' %}

                 <span>{{ all_error.0 }}</span>

             {% endif %}

         </div>

     {% endfor %}

     <input type="submit">

 </form>

 </body>

reg.html

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