Django4.0 RestFramework序列化器使用指南

在应用程序目录下新建serializer.py。例如：/home/serializer.py

from rest_framework import serializers
from . import models


class BannerModelSerializer(serializers.ModelSerializer):
    class Meta:
        # 指定轮播图数据模型
        model = models.Banner
        # 指定需要返回的数据，例如只需要 title, link, img_url字段的数据
        fields = ['title', 'link', 'img_url']


class NavModelsSerializer(serializers.ModelSerializer):
    class Meta:
        # 指定导航数据模型
        model = models.Nav
        # 指定需要返回的数据
        fields = ['id', 'title', 'link', 'is_site']

编写视图层代码：/home/views.py

from rest_framework.generics import ListAPIView
from . import models
from .serializer import BannerModelSerializer, NavModelsSerializer

# banner轮播图
class BannerView(ListAPIView):
    queryset = models.Banner.objects.filter(is_show=True, is_delete=False).order_by('orders')[0:contains.BANNER_LENGTH]
    serializer_class = BannerModelSerializer

# 顶部导航栏
class NavTopView(ListAPIView):
    queryset = models.Nav.objects.filter(is_show=True, is_delete=False, position=1).order_by('orders')[0:contains.NAV_TOP_LENGTH]
    serializer_class = NavModelsSerializer

路由层代码：/home/urls.py

from django.urls import path
from . import views

urlpatterns = [
    # banner接口
    path(r'banner/', views.BannerView.as_view()),
    # 导航栏接口
    path(r'nav/top/', views.NavTopView.as_view()),
]

至此，两个接口就已经写好了;访问 /banner/ 和 /nav/top/ 查看返回的数据：