from django.forms import Form

from django.forms import widgets

from django.forms import fields

from django.core.validators import RegexValidator

class MyForm(Form):

    user = fields.CharField(

        validators=[RegexValidator(r'^[0-9]+$', '请输入数字'), RegexValidator(r'^159[0-9]+$', '数字必须以159开头')],

    )

import re

from django.forms import Form

from django.forms import widgets

from django.forms import fields

from django.core.exceptions import ValidationError

# 自定义验证规则

def mobile_validate(value):

    mobile_re = re.compile(r'^(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$')

    if not mobile_re.match(value):

        raise ValidationError('手机号码格式错误')

class PublishForm(Form):

    title = fields.CharField(max_length=20,

                            min_length=5,

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

                                            'min_length': '标题最少为5个字符',

                                            'max_length': '标题最多为20个字符'},

                            widget=widgets.TextInput(attrs={'class': "form-control",

                                                          'placeholder': '标题5-20个字符'}))

    # 使用自定义验证规则

    phone = fields.CharField(validators=[mobile_validate, ],

                            error_messages={'required': '手机不能为空'},

                            widget=widgets.TextInput(attrs={'class': "form-control",

                                                          'placeholder': u'手机号码'}))

    email = fields.EmailField(required=False,

                            error_messages={'required': u'邮箱不能为空','invalid': u'邮箱格式错误'},

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

from django.forms import Form

from django.forms import fields

from django.forms import widgets

from app01 import models

from django.core.validators import RegexValidator

class UserInfoForm(Form):

    name=fields.CharField(

        required=True,

        min_length=6,

        max_length=12,

    )#用户提交是字符串

    email=fields.EmailField()#用户提交是字符串 正则

    phone=fields.CharField(

        #1.通过对象（支持正则表达式）

        # validators=[RegexValidator(r'^[0-9]+$', '请输入数字'), RegexValidator(r'^159[0-9]+$', '数字必须以159开头')]

        #2.通过函数

        # validators=([mobile_validate,])

        #在当前类中 方法名称有要求

        # validators=([clean_phone])

    )#自定义验证规则 正则

def clean_phone(self):
    # 去取用户提交的值：可能是错误的，可能是正确
    value = self.cleaned_data['phone']
    mobile_re = re.compile(r'^(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$')
    if not mobile_re.match(value):
        raise ValidationError('手机号码格式错误')

    if models.UserInfo.objects.filter(phone=value).count():
        raise ValidationError('手机号码已经存在')