Django组件扩展 总结
1. Form组件扩展:
验证用户输入
obj = Form(reuest,POST,request.FILES)
if obj.is_valid():
obj.clean_data
else:
obj.error
1.简单扩展 利用Form组件自带的正则扩展: a. 方式一 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( error_messages={'invalid': '...'}, validators=[RegexValidator(r'^[0-9]+$', '请输入数字'), RegexValidator(r'^159[0-9]+$', '数字必须以159开头')], ) b. 方式二 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.RegexField(r'^[0-9]+$',error_messages={'invalid': '...'}) 2.基于源码流程 a. 单字段 from django.core.exceptions import NON_FIELD_ERRORS, ValidationError class AjaxForm(forms.Form): username = fields.CharField() user_id = fields.IntegerField( widget=widgets.Select(choices=[(0,'aa'),(1,'bb'),(2,'cc'),]) ) # 自定义方法 clean_字段名 # 必须返回值self.cleaned_data['username'] # 如果出错:raise ValidationError('用户名已存在') def clean_username(self): v = self.cleaned_data['username'] if models.UserInfo.objects.filter(username=v).count(): # 整体错了 # 自己详细错误信息 raise ValidationError('用户名已存在') return v def clean_user_id(self): return self.cleaned_data['user_id'] b. 整体错误验证 class AjaxForm(forms.Form): username = fields.CharField() user_id = fields.IntegerField( widget=widgets.Select(choices=[(0,'aa'),(1,'bb'),(2,'cc'),]) ) # 自定义方法 clean_字段名 # 必须返回值self.cleaned_data['username'] # 如果出错:raise ValidationError('用户名已存在') def clean_username(self): v = self.cleaned_data['username'] if models.UserInfo.objects.filter(username=v).count(): # 整体错了 # 自己详细错误信息 raise ValidationError('用户名已存在') return v def clean_user_id(self): return self.cleaned_data['user_id'] def clean(self): value_dict = self.cleaned_data v1 = value_dict.get('username') v2 = value_dict.get('user_id') if v1 == 'root' and v2==1: raise ValidationError('整体错误信息') return self.cleaned_data