django rest framework

1 设置版本信息

from rest_framework.versioning import URLPathVersioning

1.1 settings.py 

全局设置版本信息

#全局设置版本信息
REST_FRAMEWORK={
    'DEFAULT_VERSIONING_CLASS':'rest_framework.versioning.URLPathVersioning',
    'VERSION_PARAM':'version',
    'DEFAULT_VERSION':'v1',
    'ALLOWED_VERSIONS':['v1','v2'],
    'PAGE_SIZE':1,
}

1.2 day97luffcity/urls.py

在url中体现版本信息

from django.contrib import admin
from django.urls import path,include,re_path
from api import urls

urlpatterns = [
    path('admin/', admin.site.urls),
    path('api/<str:version>/',include('api.urls')),
]

1.3 views/course.py 

在视图中查看版本信息

from rest_framework.views import APIView

from rest_framework.versioning import URLPathVersioning

class CoursesView(APIView):

    #设置版本信息
    #versioning_class = URLPathVersioning

    def get(self,request,*args,**kwargs):
        res=BaseResponse()
        #查看版本信息
        #print(request.version)

 2 分页处理

from rest_framework.pagination import PageNumberPagination

2.1 settings.py

在全局设置中设置分页的信息

#全局设置版本信息
REST_FRAMEWORK={
    'DEFAULT_VERSIONING_CLASS':'rest_framework.versioning.URLPathVersioning',
    'VERSION_PARAM':'version',
    'DEFAULT_VERSION':'v1',
    'ALLOWED_VERSIONS':['v1','v2'],
    'PAGE_SIZE':1,
}

2.2 view/course.py 

在视图中查看版本信息

from django.shortcuts import HttpResponse
from rest_framework.views import APIView
from rest_framework.versioning import URLPathVersioning
from rest_framework.response import Response
from rest_framework.pagination import PageNumberPagination
from api.serializers.course import CourseSerializer
from api.serializers.course import CourseModelSerializer
from api import models
from api.utils.response import BaseResponse


class CoursesView(APIView):

    #设置版本信息
    #versioning_class = URLPathVersioning

    def get(self,request,*args,**kwargs):
        res=BaseResponse()
        #查看版本信息
        #print(request.version)
        try:
            #方式一
            course_set=models.Course.objects.all()
            # 分页的处理
            page = PageNumberPagination()
            ser_page = page.paginate_queryset(course_set, request, self)
            #ser=CourseSerializer(instance=ser_page,many=True)
            ser = CourseModelSerializer(instance=ser_page,many=True)
            res.code=1000
            res.data=ser.data
        except Exception as e:
            res.code=500
            res.error='获取数据失败'

        return Response(res.dict)

3  序列化的使用

设置序列化为  

from rest_framework import serializers

3.1 在app中创建 serializers 的python包

serializers/course.py  设置 model中数据的 一对多，一对一，普通字段，还有选择字段的 取值序列化的展示方式

from rest_framework import serializers
from api import models
class CourseSerializer(serializers.Serializer):
    id=serializers.IntegerField()
    name=serializers.CharField()

class CourseModelSerializer(serializers.ModelSerializer):
    #(level_choices = ((0, '初级'), (1, '中级'), (2, '高级'))  这种实现方式
    level_name=serializers.CharField(source='get_level_display')
    #一对一,一对多的实现方式
    hours=serializers.CharField(source='coursedetail.hours')
    #多对多的实现方式
    recommend_courses=serializers.SerializerMethodField()

    #serializers.ModelSerializer 的实现方式
    class Meta:
        model=models.Course
        fields=['id','name','level_name','hours','recommend_courses']

    #多对多
    def get_recommend_courses(self,row):
        recommend_list=row.coursedetail.recommend_courses.all()
        return [{'id':item.id,'name':item.name} for item in recommend_list]

3.2 views/course.py

在视图中取的数据后交给序列化的对象去处理

from django.shortcuts import HttpResponse
from rest_framework.views import APIView
from rest_framework.versioning import URLPathVersioning
from rest_framework.response import Response
from rest_framework.pagination import PageNumberPagination
from api.serializers.course import CourseSerializer
from api.serializers.course import CourseModelSerializer
from api import models
from api.utils.response import BaseResponse


class CoursesView(APIView):

    #设置版本信息
    #versioning_class = URLPathVersioning

    def get(self,request,*args,**kwargs):
        res=BaseResponse()
        #查看版本信息
        #print(request.version)
        try:
            #方式一
            course_set=models.Course.objects.all()
            # 分页的处理
            page = PageNumberPagination()
            ser_page = page.paginate_queryset(course_set, request, self)
            #ser=CourseSerializer(instance=ser_page,many=True)
            ser = CourseModelSerializer(instance=ser_page,many=True)
            res.code=1000
            res.data=ser.data
        except Exception as e:
            res.code=500
            res.error='获取数据失败'

        return Response(res.dict)

class CourseDetailView(APIView):

    def get(self,request,pk,*args,**kwargs):
        course_set = models.Course.objects.filter(pk=pk).first()
        # course_set_2=models.Course.objects.get(pk=pk)
        # print(type(course_set),type(course_set_2))
        ser=CourseModelSerializer(instance=course_set)
        return Response(ser.data)