序列化操作
???- Errordict
???????- 自定义Encoder
???????- django的模块可以直接序列化
???????????第一种：
???????????from django.core import serializers # 通过这个模块对queryset对象可以直接序列化
???????????ret = models.tb.objects.all()
???????????data = serializers.serialize("json",ret) #这里指定将ret序列化为json
???????????第二种：
???????????ret = models.tb.objects.values(‘id‘,‘name‘)
???????????v = list(ret)
???????????json.dumps(v)
???????????这样不可以对时间序列化，如果要序列化时间，序号使用json.dumps(v,cls=JsonCustomEncoder（说明这个需要自定制）)
实例：通过ajax提交前端表单数据到后台，后台通过form表单进行验证，如果有错误，通过重写类进行一次json序列化返回给前台
html代码
<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8"> ???<title>login</title></head><body><form id="loginform"> ???{% csrf_token %} ???<input type="text" name="username" /> ???<input type="password" name="pwd" /> ???<a id="sub">提交</a></form><script src="/static/jquery-1.12.4.min.js"></script><script> ???$(function () { ???????$(‘#sub‘).click(function () { ???????????$.ajax({ ???????????????url:‘/app04/login‘, ???????????????type:‘POST‘, ???????????????data:$(‘#loginform‘).serialize(), ???????????????success:function (data) { ???????????????????console.log(data); ???????????????????arg = JSON.parse(data) ???????????????}, ???????????????error:function () { ???????????????????console.log(data) ???????????????} ???????????}) ???????}) ???????} ???????????)</script></body></html>python代码
from django.shortcuts import render,HttpResponseimport jsonfrom django import formsfrom django.forms import fields,widgetsclass logform(forms.Form): ???username = fields.CharField() ???pwd = fields.CharField( ???????max_length=64, ???????min_length=12 ???)from django.core.exceptions import ValidationErrorclass JsonCustomEncoder(json.JSONEncoder): ???‘‘‘重写此类，可以解决以下出现的2次序列化的问题，通过这个类可以一次性序列化‘‘‘ ???def default(self, field): ???????if isinstance(field,ValidationError): ???????????return {‘code‘:field.code,‘messages‘:field.messages} ???????else: ???????????return json.JSONEncoder.default(self,field)def login(request): ???if request.method == ‘GET‘: ???????return render(request,‘app04/login.html‘) ???if request.method == ‘POST‘: ???????ret = {‘status‘:True,‘error‘:None,‘data‘:None} ???????out = logform(request.POST) ???????if out.is_valid(): ???????????print(out.cleaned_data) ???????else: ???????????ret[‘error‘] = out.errors.as_data() ???????????print(ret) ???????????result = json.dumps(ret,cls=JsonCustomEncoder) ????????????return HttpResponse(result) ???django学习之- json序列化
原文地址：http://www.cnblogs.com/zy6103/p/8083079.html