django model field validator 设置

转自：http://blog.csdn.net/cwjcwj520/article/details/17330845

例子为想在创建用户名的时候验证输入字符是否有效，并且插入了even_field为Category

model.py 中加入：

from django.core.exceptions import ValidationError
import re

def validate_letter(value):
p = re.compile(r'^[\d\w_]{1,30}$')
if p.match(value) == None:
raise ValidationError(u"Username can only have digital, letter and '_'.")

def validate_even(value):
print 'validate_even'
if value % 2 != 0:
raise ValidationError(u'%s is not an even number' % value)

class Category(models.Model):
title = models.CharField(max_length=100, db_index=True, validators=[validate_letter])

slug = models.SlugField(max_length=100, db_index=True)

even_field = models.IntegerField(validators=[validate_even])

巴特西

django model field validator 设置

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