django-restframework-serializers

设置URL

re_path(r'^(?P<version>w+)/courselist.html$', course.CourseView.as_view({'get': 'list'})),
re_path(r'^(?P<version>w+)/(?P<pk>d+)/courselist.html$',course.CourseView.as_view({'get': 'retrieve',})),

serializers

from rest_framework.viewsets import ViewSetMixin   #继承这个类后可以使用带参数的as_view()方法
from rest_framework.views import APIView　　　　　　　#构建新的request和dispatch方法可以使用.data方法

　
from rest_framework import serializers
from luffyrestful import models
from rest_framework.response import Response


class CourseSerialize(serializers.ModelSerializer): 

    level = serializers.CharField(source='get_level_display') #自定义序列化字段显示level字段choices的值

    class Meta:
        model = models.Course
        fields = ['id', 'title', 'course_img', 'level']


class CourseDetailSerialize(serializers.ModelSerializer):
    level = serializers.CharField(source='course.get_level_display')
    course_img = serializers.CharField(source='course.course_img')
    title = serializers.CharField(source='course.title')
    course_section = serializers.SerializerMethodField()
    recommend = serializers.SerializerMethodField()

    class Meta:
        model = models.CourseDetail
        fields = ['title','slogan', 'why','level','course_img', 'course_section', 'recommend']

    def get_course_section(self,obj):
        queryset = obj.course.chapter_set.all()
        return [{'name': chapter_obj.name, 'num': chapter_obj.num} for chapter_obj in queryset]

    def get_recommend(self, obj):
        queryset = obj.recommend.all()
        return [{'title': course_obj.title, 'level': course_obj.get_level_display()} for course_obj in queryset]


class CourseView(ViewSetMixin, APIView):

    def list(self, request, *args, **kwargs):
        ret = {'code': 1000, 'data': None}
        try:
            course_list = models.Course.objects.all()
            src = CourseSerialize(course_list, many=True)
            ret['data'] = src.data
            return Response(ret)
        except Exception as e:
            ret['code'] = 1001
            ret['error'] = e
            return Response(ret)

    def retrieve(self,request, *args, **kwargs):
        ret = {'code': 1000, 'data': None}
        try:
            pk = kwargs.get('pk')
            query_obj = models.CourseDetail.objects.filter(course_id=pk).first()
            src = CourseDetailSerialize(query_obj, many=False)
            ret['data'] = src.data
            return Response(ret)
        except Exception as e:
            ret['code'] = 1001
            ret['error'] = e
            return Response(ret)