【一】前言#

什么意思呢？
- 就是我的前段想拿到由ORM得到的数据库里面的一个个用户对象
- 我的后端想直接将实例化出来的数据对象直接发送给客户端
- 那么这个时候，就可以用Django给我们提供的序列化方式

【二】案例#

在前端获取到后端用户表里面的所有数据，并且格式是列表套字典

【0】创建模型表#

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from django.db import models
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# Create your models here.
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class User(models.Model):
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    username = models.CharField(max_length=32, verbose_name="姓名")
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    age = models.IntegerField(verbose_name="年龄")
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    gender_choices = (
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        (1, 'male'),
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        (2, 'female'),
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        (3, 'others')
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    )
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    gender = models.IntegerField(choices=gender_choices, verbose_name="性别")

【1】基于JsonResponse序列化数据#

后端

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def ab_ser(request):
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    user_queryset = models.User.objects.all()
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    # 返回数据格式：[{},{},,{},{},{},{}]
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    user_list = []
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    for user in user_queryset:
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        tmp = {
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            'username': user.username,
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            'password': user.age,
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            'gender': user.get_gender_display(),
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        }
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        user_list.append(tmp)
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    return JsonResponse(user_list, safe=False)
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    # return render(request, 'ab_ser.html', locals())

前端

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<body>
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{% for user_obj in user_queryset %}
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    <p>{{ user_obj.name }}</p>
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{% endfor %}
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</body>

前端接收到的数据展示

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[
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{"username": "dream", "password": 18, "gender": "male"},
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{"username": "meng", "password": 28, "gender": "female"},
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{"username": "hope", "password": 38, "gender": "others"}
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]

【2】基于Django自带的serializers组件#

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from django.core import serializers
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def ab_ser(request):
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    user_queryset = models.User.objects.all()
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    res = serializers.serialize('json', user_queryset)
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    '''
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    serializers 模块内部会帮我们将数据全部变成JSON格式的字符串，并且内部非常的全面
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    '''
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    return HttpResponse(res)

前端返回的到的数据

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[
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{
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  "model": "app01.user",
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  "pk": 1,
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  "fields": {"username": "dream", "age": 18, "gender": 1}},
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{
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  "model": "app01.user",
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  "pk": 2,
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  "fields": {"username": "meng", "age": 28, "gender": 2}},
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{
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  "model": "app01.user",
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  "pk": 3,
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  "fields": {"username": "hope", "age": 38, "gender": 3}}
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]