RegexValidator checker:
In a custom form component class set field validators value introduced RegexValidator module
from django import forms
from django.core.validators import RegexValidator
from django.core.exceptions import ValidationError
class Myform(forms.Form):
name = forms.CharField(
# Required = True, # default is True
min_length=2,
max_length=6,
Initial = 'ABC' , # Default
help_text = ' a length of 2 to . 6 characters! ' , # Help
error_messages = [{ # custom error message ( default is English )
'required' : ' can not be empty! ' ,
'min_length' : ' can not be less than 2 characters! '
}],
validators = [RegexValidator ( R & lt '^ (\ W) + $' , ' User name only alphanumeric underscores! ' ),],
# Disabled = True # The default is True display
)
email = fields.EmailField(required=False,
error_messages, = { 'required' : U ' E-mail can not be empty ' , 'invalid' : U ' mailbox format error ' },
widget=widgets.TextInput(attrs={'class': "form-control", 'placeholder': u'邮箱'}))
Custom function check:
from django.shortcuts import render,HttpResponse
from django import forms
from app01 import models
from django.core.validators import RegexValidator
import re
from django.core.exceptions import ValidationError
# Custom check function, directly in the field validators use
def name_valid(value):
name_re=re.compile(r'^[a-zA-Z_]+$')
if not name_re.match(value):
The raise ValidationError ( " can only begin with the letter underlined! " )
class Myform(forms.Form):
name = forms.CharField(
# Required = True, # default is True
min_length=2,
max_length=6,
Initial = 'ABC' , # Default
help_text = ' a length of 2 to . 6 characters! ' , # Help
error_messages = [{ # custom error message ( default is English )
'required' : ' can not be empty! ' ,
'min_length' : ' can not be less than 2 characters! '
}],
validators = [RegexValidator ( R & lt '^ (\ W) + $' , ' User name only alphanumeric underscores! ' ), name_valid],
# Custom validation rules ( the list of custom function names discharge or introduce django built RegexValidator validator, can mix )
)
Calibration sequence:
自定义类实例化返回值对象的is_valid()方法调用：
（1）字段规则校验
（2）validators校验（RegexValidator校验器或自定义校验函数）
（3）局部钩子（类中定义的以clean_字段名命名的函数，校验正常必须返回该字段的值self.cleaned_data.get('name')）
（4）全局钩子（类中定义的函数名clean，校验正常必须返回该对象的校验结果值return self.cleaned_data）
（5）每一步通过校验单结果都以字典形式保存在类对象的cleaned_data属性中