Django form
Posted gaizhongfeng
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Django form 使用步骤：
1.创建模板 class LoginForm(forms.Form) .... 2.创建模板对象，将请求传给模板 obj = LoginForm(req.POST) 3.验证 obj.is_valid(): 4.获取正确信息/错误信息 正确信息：obj.clean() 错误信息：obj.errors
views：
from django.core.exceptions import ValidationError from django.core.serializers import json from django.http import HttpResponse from django.shortcuts import render from django import forms # Create your views here. # 定义模板 class LoginForm(forms.Form): # 与 html 标签name相对应 user = forms.CharField(min_length=6,error_messages={"required":"用户名不能为空","min_length":"长度不能小于6"}) pwd = forms.CharField(min_length=6) def test(req): print(req.POST.get(‘pwd‘)) return render(req,‘login.html‘) def login(req): if req.method == "GET": obj = LoginForm() return render(req, ‘login.html‘,{‘obj‘:obj}) elif req.method == "POST": ‘‘‘ # 模板会去取post中的值 obj = LoginForm( req.POST) #验证 status = obj.is_valid() print(status) #拿到验证通过的值 value = obj.clean() print(value) #获取错误的值obj.errors error_obj=obj.errors.as_json() print(error_obj) ‘‘‘ obj = LoginForm(req.POST) if obj.is_valid(): value = obj.clean() print(value) # create(**value) else: error_obj = obj.errors #拿到user 的错误信息 print(error_obj[‘user‘][0]) return render(req, ‘login.html‘,{‘obj‘:obj}) #ajax #return HttpResponse(req,cls=JsonCustomeEncoder) class JsonCustomeEncoder(json.DjangoJSONEncoder): def default(self,field): if isinstance(field,ValidationError): return {‘code‘:field.code,‘message‘:field.message} else: return json.DjangoJSONEncoder.default(self,field)
html:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action="/login.html" method="post"> user:{{ obj.user }}<input type="text" name="user"/> <span>{{ obj.errors.user.0}}</span> password:{{ obj.pwd }} <input type="text" name="pwd"> <span>{{ obj.errors.pwd.0}}</span> <input type="submit" value="提交"> <input type="button" id="ajax_submit" value="ajax_submit"> </form> <script src="/static/jquery-2.1.4.min.js"></script> <script> $(function () { $(‘#ajax_submit‘).click(function () { $.ajax({ url:"login.html", data: {user:‘root‘,pwd:‘123‘}, type:"POST", success:function (arg) { } }); }); }) </script> </body> </html>
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