1911A：课程主页面三个接口开发

0.课程主页面接口对应页面效果

1.课程类别接口开发

1.1 course/urls.py 添加路由

from django.urls import path, re_path
from rest_framework.routers import DefaultRouter # 导入DRF得DefaultRouter

from . import views

router = DefaultRouter() # 有根路由
router.register(r'type', views.CourseTypeViewSet) # 写路由

urlpatterns = [
     
]

urlpatterns += router.urls # 把两个路由列表相加

1.2 course/serializers.py 写序列化器

from rest_framework import serializers
from course.models import CourseType

class CourseTypeSerializer(serializers.ModelSerializer):
    class Meta:
        model = CourseType
        fields = '__all__'

1.3 course/views.py 添加视图函数

from rest_framework import viewsets
from rest_framework.pagination import PageNumberPagination

from course.models import *
from course.serializers import *

class PageNum(PageNumberPagination):
    page_size_query_param = 'page_size'

class CourseTypeViewSet(viewsets.ModelViewSet):
    queryset = CourseType.objects.all()
    serializer_class = CourseTypeSerializer

1.4 course/admin.py 注册后台管理

from django.contrib import admin
from . import models

admin.site.register(models.CourseType)

1.5 测试接口

http://192.168.56.100:8888/course/type/

2.标签接口开发

2.1 course/urls.py 添加路由

router.register(r'tag', views.CourseTagViewSet)

2.2 course/serializers.py 写序列化器

from rest_framework import serializers
from course.models import CourseTag

class CourseTagSerializer(serializers.ModelSerializer):
    class Meta:
        model = CourseTag
        fields = '__all__'

2.3 course/views.py 添加视图函数

from course.models import *
from course.serializers import *

class CourseTagViewSet(viewsets.ModelViewSet):
    queryset = CourseTag.objects.all()
    serializer_class = CourseTagSerializer

2.4 course/admin.py 注册后台管理

from django.contrib import admin
from . import models

admin.site.register(models.CourseTag)

2.5 测试接口

http://192.168.56.100:8888/course/tag/

3.课程接口开发

3.1 course/urls.py 添加路由

router.register(r'course', views.CourseViewSet)

3.2 course/serializers.py 写序列化器

# -*- coding: utf-8 -*-
from rest_framework import serializers
from course.models import *

class CourseSerializer(serializers.ModelSerializer):
    class Meta:
        model = Course
        fields = '__all__' # 所有字段

class SectionsSerializer(serializers.ModelSerializer):
    class Meta:
        model = Sections
        fields = '__all__'

class ChaptersSerializer(serializers.ModelSerializer):
    sections = SectionsSerializer(many=True)
    class Meta:
        model = Chapters
        fields = '__all__'

class CourseDeepSerializer(CourseSerializer):
    # 字段名名, 必须是模型可以 . 引用到的变量
    # Course(). "chapters" 才能作为字段名, 如果是集合, 需要加many=True,
    chapters = ChaptersSerializer(many=True)

3.3 course/views.py 添加视图函数

from django.shortcuts import render
from django_filters.rest_framework import DjangoFilterBackend
from rest_framework import viewsets
from rest_framework.filters import OrderingFilter
from rest_framework.pagination import PageNumberPagination

from course.models import *
from course.serializers import *

class CourseViewSet(viewsets.ModelViewSet):
    queryset = Course.objects.all()
    serializer_class = CourseDeepSerializer
    
    # 指定过滤方法类, 排序方法类, 一个或多个
    filter_backends = (DjangoFilterBackend, OrderingFilter) # 同时支持过滤和排序

    # 指定排序字段, 不设置, 排序功能不起效
    ordering_fields = ('attention', 'learner', 'create_time')
    
    # 指定过滤字段, 不设置, 过滤功能不起效
    filter_fields = ('title', 'desc', 'status', 'course_type', 'course_tag')

    # 自定义分页器 覆盖全局配置
    pagination_class = PageNum

    def get_serializer_class(self):
        if self.action == 'list':
            return CourseSerializer
        else:
            return CourseDeepSerializer

3.4 course/admin.py 注册后台管理

from django.contrib import admin
from . import models

admin.site.register(models.Course)

3.5 测试接口

http://192.168.56.100:8888/course/course/