from django.db import models

class Course(models.Model):

    """

    课程表

    """

    title = models.CharField(verbose_name='课程名称',max_length=32)

    course_img = models.CharField(verbose_name='课程图片',max_length=64)

    level_choices = (

        (1,'初级'),

        (2,'中级'),

        (3,'高级'),

    )

    level = models.IntegerField(verbose_name='课程难易程度',choices=level_choices,default=1)

    def __str__(self):

        return self.title

class CourseDetail(models.Model):

    """

    课程详细

    """

    course = models.OneToOneField(to='Course')

    slogon = models.CharField(verbose_name='口号',max_length=255)

    why = models.CharField(verbose_name='为什么要学？',max_length=255)

    recommend_courses = models.ManyToManyField(verbose_name='推荐课程',to='Course',related_name='rc')

    def __str__(self):

        return "课程详细："+self.course.title

class Chapter(models.Model):

    """

    章节

    """

    num =  models.IntegerField(verbose_name='章节')

    name = models.CharField(verbose_name='章节名称',max_length=32)

    course = models.ForeignKey(verbose_name='所属课程',to='Course')

    def __str__(self):

        return self.name

from django.conf.urls import url,include

from api.views import course

urlpatterns = [

    url(r'^course/$', course.CourseView.as_view({'get':'list'})),

    url(r'^course/(?P<pk>\d+)$', course.CourseView.as_view({'get':'retrieve'})),

    url(r'^test$', course.test),

]

from rest_framework.views import APIView

from rest_framework.response import Response

from api import models

from rest_framework import serializers

class CourseSerializer(serializers.ModelSerializer):

    class Meta:

        model = models.Course

        fields = "__all__"

class CourseDetailSerializer(serializers.ModelSerializer):

    # one2one/fk/choice

    title = serializers.CharField(source='course.title')

    img = serializers.CharField(source='course.course_img')

    level = serializers.CharField(source='course.get_level_display')

    # m2m

    recommends = serializers.SerializerMethodField()

    class Meta:

        model = models.CourseDetail

        fields = ['course','title','img','level','slogon','why','recommends']

    def get_recommends(self,obj):

        # 获取推荐的所有课程

        queryset = obj.recommend_courses.all()

        return [{'id':row.id,'title':row.title} for row in queryset]

# View

# APIView

# GenericAPIView

from rest_framework.viewsets import GenericViewSet,ViewSetMixin,ModelViewSet

class CourseView(ViewSetMixin,APIView):

    def list(self,request,*args,**kwargs):

        """

        课程列表接口

        :param request:

        :param args:

        :param kwargs:

        :return:

        """

        ret = {'code':1000,'data':None}

        try:

            queryset = models.Course.objects.all()

            ser = CourseSerializer(instance=queryset,many=True)

            ret['data'] = ser.data

        except Exception as e:

            ret['code'] = 1001

            ret['error'] = '获取课程失败'

        return Response(ret)

    def retrieve(self,request,*args,**kwargs):

        """

        课程详细接口

        :param request:

        :param args:

        :param kwargs:

        :return:

        """

        ret = {'code': 1000, 'data': None}

        try:

            # 课程ID=2

            pk = kwargs.get('pk')

            # 课程详细对象

            obj = models.CourseDetail.objects.filter(course_id=pk).first()

            ser = CourseDetailSerializer(instance=obj,many=False)

            ret['data'] = ser.data

        except Exception as e:

            ret['code'] = 1001

            ret['error'] = '获取课程失败'

        return Response(ret)

def test(request,*args,**kwargs):

    from django.shortcuts import HttpResponse

    obj = models.Course.objects.filter(id=2).first()

    print(obj.title)

    print(obj.level) #

    print(obj.get_level_display() ) #

    return HttpResponse('...')

http://127.0.0.1:8000/api/v1/course/　　

http://127.0.0.1:8000/api/v1/course/1