Django学习系列之ModelForm

前面两篇写了有关Form与Form的验证，今天我们来写些ModelForm，因为现在的web开发都基与db驱动的，所以models.py的定义是少不掉的，但我们会发现它的定义与forms.py定义很接近，为此减少输入，我们可以使用modelForm这个模块，可减少代码输入。

先定义models.py
#coding:utf-8
from django.db import models

SEX_CHOICES=(
('male','男'),
('female','女')
)

class Register(models.Model):
sn = models.CharField(max_length=30,blank=True)
nickname = models.CharField(max_length=50)
username = models.CharField(max_length=50)
password = models.CharField(max_length=50)
sex = models.CharField(max_length=10,choices=SEX_CHOICES,null=True,blank=True)
email = models.EmailField(max_length=50)
phone = models.CharField(max_length=30,null=True,blank=True)
birthday = models.DateField(max_length=50,null=True,blank=True)

def __unicode__(self):
return self.nickname

class Meta:
ordering = ('-sn',) #排序

#def clean(self): #此部分本来是用来验证的，但想想还是将验证放到forms.py中吧。
# print self.nickname
再定义forms.py
#coding:utf-8
from django import forms
from mysite.models import Register
from django.core.exceptions import ValidationError
from django.forms.extras.widgets import SelectDateWidget

SEX_CHOICES=(
('male','男'),
('female','女')
)

BIRTH_YEAR_CHOICES = ('1980', '1981', '1982','1983','1984')

def validate_phone(value):
if not value.isdigit():
raise ValidationError(u'%s不是电话号码' % value)

class RegisterForm(forms.ModelForm):
password = forms.CharField(widget=forms.PasswordInput(attrs={'id':'pass'}))
sex = forms.ChoiceField(widget=forms.RadioSelect,choices=SEX_CHOICES)
birthday = forms.DateField(required=False,widget=SelectDateWidget(years=BIRTH_YEAR_CHOICES))
phone = forms.CharField(required=False,validators=[validate_phone])

class Meta:
model = Register
#fields = ['nickname','username','password','phone']
fields = '__all__'

def clean(self):
cleaned_data=super(RegisterForm,self).clean()
nick_name=cleaned_data.get('nickname')
username = cleaned_data.get('username')
password = cleaned_data.get('password')
email = cleaned_data.get('email')

if not nick_name:
self._errors['nickname'] = self.error_class([u"请输入别名!"])

if not username:
self._errors['username'] = self.error_class([u"请输入用户名!"])

if not password:
self._errors['password'] = self.error_class([u"请输入密码!"])

if nick_name == username and nick_name:
self._errors['nickname'] = self.error_class([u"别名与用户名不能一样!"])

if not email:
self._errors['email'] = self.error_class([u"请输入正确邮箱!"])

if email == "badboy@163.com": #此部分可以扩展，将其数据从用户注册表中取出
self._errors['email'] = self.error_class([u"邮箱已经存在，请换一个!"])
return cleaned_data

以上仅供参考!