Django序列化

序列化定义:

向后台发送请求数据,序列化返回一个数据,这个过程称之为序列化,或者也可以理解为,

把一个对象转换为字符串,这个转换完成以后的对象可以被保存到本地文件中,这个过程就称之为序列化。

反之:如果把一个字符串,或文件转换为一个对象,这个过程称之为反序列化。

 示例一:(适用于数据量很少的场合)

# views
from django.shortcuts import render, HttpResponse
from day60app import models
# Create your views here.


def alignment(request):

    return render(request, "alignment.html")


def get_data(request):
    user_list = models.UserTabel.objects.all()

    return render(request, "get_data.html", {"user_list": user_list})

# models
from django.db import models

# Create your models here.


class UserTabel(models.Model):
    user = models.CharField(max_length=10)
    age = models.IntegerField
    email = models.EmailField(max_length=20)


# 前端

页面一:
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<h1>用户列表</h1>
<table id="tb">

</table>

<script src="/static/jquery-3.1.1.js"></script>
<script>
    $(function () {
        initData()
    });

    function initData() {
        $.ajax({
            url:"/get_data/",
            type:"GET",
            success:function (arg) {
{#                console.log(arg)#}
            $("#tb").append(arg);
            }
        })
    }



</script>
</body>
</html>


页面二:
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
{% for row in user_list %}
    <tr>
        <td>
            {{ row.user }}
        </td>
        <td>
            {{ row.email }}
        </td>
    </tr>


{% endfor %}
</body>
</html>

 

示例二:(serializers,django自带的序列化)

# views

from django.shortcuts import render, HttpResponse
from day60app import models
from django.core import serializers
import json

def alignment(request):

    return render(request, "alignment.html")


def get_data(request):
    ret = {"status": True, "data": None}
    try:

        # serializers,django自带的序列化,只能序列化QuerySet对象
        # 基于对象的序列化
        # user_list = models.UserTabel.objects.all()
        # ret["data"] = serializers.serialize("json", user_list)
        # 前端
        # var v = JSON.parse(arg.data);


        # 基于字典的序列化,用list将QuerySet对象转换为list类型
        # user_list = models.UserTabel.objects.all().values("id", "user")
        user_list = models.UserTabel.objects.all().values_list("id", "user")
        # 前端console.log(arg.data);


        ret["data"] = list(user_list)

    except Exception as e:
        ret["status"] = False

    result = json.dumps(ret)
    return HttpResponse(result)


# 前端

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<h1>用户列表</h1>
<table id="tb">

</table>

<script src="/static/jquery-3.1.1.js"></script>
<script>
    $(function () {
        initData()
    });

    function initData() {
        $.ajax({
            url:"/get_data/",
            type:"GET",
            dataType:"JSON",

            success:function (arg) {
{#                console.log(arg)#}
                if (arg.status){
                    console.log(arg.data);
{#                    var v = JSON.parse(arg.data);  /*基于serializers,django自带的序列化在进行反序列化*/#}
                }

            }
        })
    }



</script>
</body>
</html>

 

posted @ 2017-03-19 21:56  LaniLai  阅读(269)  评论(0编辑  收藏  举报