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.单字段验证
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,‘alex‘),(1,‘刘皓宸‘),(2,‘杨建‘),]) ) # 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,‘alex‘),(1,‘刘皓宸‘),(2,‘杨建‘),]) ) # 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
2 django序列化
序列化 queryset的类型 需要用django自带的
from django.core import serializers import json def get_data(request): ret = {‘status‘: True} userlist = models.Student.objects.all() ret[‘data‘] = serializers.serialize(‘json‘, userlist) return HttpResponse(json.dumps(ret))
原文地址:https://www.cnblogs.com/hexintong/p/9579864.html
时间: 2024-10-08 23:53:42