#!/usr/bin/env python

 # -*- coding: utf8 -*-

 #__Author: "Skiler Hao"

 #date: 2017/3/30 15:40

 from django.core.exceptions import ValidationError  #抛出异常

 from django import forms

 from django.forms import fields

 from django.forms import widgets   #内部有插件 用于密码什么二次验证

 from django.core.validators import RegexValidator  #定义正则表达式

 from respository import models

 class RegisterForm(forms.Form):

     username = fields.CharField(
　　　　　　 #limit_cjoices_to={"username__in":["alex","egon']}   补充##针对select的所有queryset做筛选,用于foreignkey,manaytomany字段

         required=True,

         widget=widgets.TextInput(attrs={'class': "form-control",'placeholder': '用户名为8-12个字符'}),

         min_length=6,

         max_length=12,

         strip=True,

         error_messages={'required': '标题不能为空',

                         'min_length': '用户名最少为6个字符',

                         'max_length': '用户名最不超过为20个字符'},

     )

     email = fields.EmailField(

         required=True,

         widget=widgets.TextInput(attrs={'class': "form-control",'placeholder': '请输入邮箱'}),

         strip=True,

         error_messages={'required': '邮箱不能为空',

                         'invalid':'请输入正确的邮箱格式'},

     )

     pwd = fields.CharField(

         widget=widgets.PasswordInput(attrs={'class': "form-control",'placeholder': '请输入密码，必须包含数字,字母,特殊字符'},render_value=True),

         required=True,

         min_length=6,

         max_length=12,

         strip=True,

         validators=[

             # 下面的正则内容一目了然，我就不注释了

             RegexValidator(r'((?=.*\d))^.{6,12}$', '必须包含数字'),

             RegexValidator(r'((?=.*[a-zA-Z]))^.{6,12}$', '必须包含字母'),

             RegexValidator(r'((?=.*[^a-zA-Z0-9]))^.{6,12}$', '必须包含特殊字符'),

             RegexValidator(r'^.(\S){6,10}$', '密码不能包含空白字符'),

         ], #用于对密码的正则验证

         error_messages={'required': '密码不能为空!',

                         'min_length': '密码最少为6个字符',

                         'max_length': '密码最多不超过为12个字符!',},

     )

     pwd_again = fields.CharField(

         #render_value会对于PasswordInput，错误是否清空密码输入框内容，默认为清除，我改为不清楚

         widget=widgets.PasswordInput(attrs={'class': "form-control",'placeholder': '请再次输入密码!'},render_value=True),

         required=True,

         strip=True,

         error_messages={'required': '请再次输入密码!',}

     )

     def clean_username(self):

         # 对username的扩展验证，查找用户是否已经存在

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

         users = models.User.objects.filter(username=username).count()

         if users:

             raise ValidationError('用户已经存在！')

         return username

     def clean_email(self):

         # 对email的扩展验证，查找用户是否已经存在

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

         email_count = models.User.objects.filter(email=email).count() #从数据库中查找是否用户已经存在

         if email_count:

             raise ValidationError('该邮箱已经注册！')

         return email

     def _clean_new_password2(self): #查看两次密码是否一致

         password1 = self.cleaned_data.get('pwd')

         password2 = self.cleaned_data.get('pwd_again')

         if password1 and password2:

             if password1 != password2:

                 # self.error_dict['pwd_again'] = '两次密码不匹配'

                 raise ValidationError('两次密码不匹配！')

     def clean(self):

         #是基于form对象的验证，字段全部验证通过会调用clean函数进行验证

         self._clean_new_password2() #简单的调用而已

 class loginForm(forms.Form):

     username = fields.CharField(

         required=True,

         widget=widgets.TextInput(attrs={'class': "form-control",'placeholder': '请输入用户名'}),

         min_length=6,

         max_length=12,

         strip=True,

         error_messages={'required': '用户名不能为空',}

     )

     pwd = fields.CharField(

         widget=widgets.PasswordInput(attrs={'class': "form-control",'placeholder': '请输入密码'}),

         required=True,

         min_length=6,

         max_length=12,

         strip=True,

         error_messages={'required': '密码不能为空!',}

     )

     def clean(self):

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

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

         user = models.User.objects.filter(username=username).first()

         if username and pwd:

             if not user :

                 # self.error_dict['pwd_again'] = '两次密码不匹配'

                 raise ValidationError('用户名不存在！')

             elif pwd != user.password:

                 raise ValidationError('密码不正确！')

 forms.py