课程模块构建
1.在apps/course新建courseApp中
# -*- coding: utf-8 -*
from django.db import models
# Create your models here.
# 基类
class Base(models.Model):
create_time = models.TimeField(auto_now_add=True)
update_time = models.TimeField(auto_now=True)
class Meta:
abstract = True
# 继承基类
class CourseType(Base):
title = models.CharField('课程类别', max_length=16)
sequence = models.IntegerField('展示顺序', default=10)
class Meta:
db_table = 'tb_coursetype'
def __str__(self):
return self.title
class CourseTag(Base):
title = models.CharField('课程标签', max_length=16)
sequence = models.IntegerField('展示顺序', default=10)
class Meta:
db_table = 'tb_coursetag'
def __str__(self):
return self.title
class Course(Base):
STATUS = (
('0', '即将上线'),
('1', '已上线'),
('2', '已下线'),
)
title = models.CharField('课程名', max_length=24)
desc = models.CharField('课程描述', max_length=256)
img = models.ImageField('课程logo', upload_to='course', null=True)
course_type = models.ForeignKey(CourseType, verbose_name='课程类型', on_delete=models.SET_NULL, default=None, null=True)
course_tag = models.ManyToManyField(CourseTag, verbose_name='课程标签')
status = models.CharField('课程状态', choices=STATUS, max_length=8, default='1')
attention = models.IntegerField('关注人数', default=0)
learner = models.IntegerField('学习人数', default=0)
class Meta:
db_table = 'tb_course'
verbose_name = '课程'
def __str__(self):
return self.title
class Chapters(Base):
title = models.CharField('章标题', max_length=24)
serial_num = models.IntegerField('章序号')
course = models.ForeignKey(Course, related_name='chapters', on_delete=models.SET_NULL, null=True)
class Meta:
db_table = 'tb_chapters'
def __str__(self):
return self.title
class Sections(Base):
title = models.CharField('节标题', max_length=24)
serial_num = models.IntegerField('节序号')
chapters = models.ForeignKey(Chapters, related_name='sections', on_delete=models.SET_NULL, null=True)
learn_time = models.IntegerField('学习小时', default=1)
video = models.FileField('上传视频', upload_to='video/%Y%m%d/', blank=True, max_length=1024)
seq_num = models.IntegerField('序号', default=1)
class Meta:
db_table = 'tb_sections'
def __str__(self):
return self.title
# 路径表
class Path(Base):
title = models.CharField('路径标题', max_length=24)
img = models.ImageField('路径logo', upload_to='path', null=True)
desc = models.CharField('路径描述', max_length=255)
user = models.ManyToManyField('user.User', blank=True)
def course_total(self):
count = 0
# 获取所有阶段，循环所有课程添加到阶段里
for jd in self.jieduan.all():
count = count + jd.courses.count()
return count
class Meta:
db_table = 'tb_path'
def __str__(self):
return self.title
# 阶段表
class JieDuan(Base):
title = models.CharField('阶段名', max_length=16)
serial_num = models.IntegerField('阶段序号')
path = models.ForeignKey(Path, related_name='jieduan', on_delete=models.SET_NULL, null=True)
courses = models.ManyToManyField(Course, blank=True)
class Meta:
db_table = 'tb_jieduan'
def __str__(self):
return "%s-第%s阶段-%s" % (self.path.title, self.serial_num, self.title)
2.在course/Serializers中
# -*- coding: utf-8 -*-
from rest_framework import serializers
from course.models import *
# 节表
class SectionsSerializer(serializers.ModelSerializer):
class Meta:
model = Sections
fields = '__all__'
# 章表
class ChaptersSerializer(serializers.ModelSerializer):
# 反向查找
sections = SectionsSerializer(many=True, read_only=True)
class Meta:
model = Chapters
fields = '__all__'
# 课程表
class CourseDeepSerializer(serializers.ModelSerializer):
# 字段名，必须是模型，可以引用到的变量
# Course() 'chaoters' 才能作为字段名 如果是集合需要加 many=Ture
chapters = ChaptersSerializer(many=True, read_only=True)
class Meta:
model = Course
fields = '__all__'
# depth=2 # 深度=2 有两个外键
class CourseSerializer(serializers.ModelSerializer):
class Meta:
model = Course
fields = '__all__'
# 课程分类
class CourseTypeSerializer(serializers.ModelSerializer):
class Meta:
model = CourseType
fields = '__all__'
# 课程标签
class CourseTagSerializer(serializers.ModelSerializer):
class Meta:
model = CourseTag
fields = '__all__'
# 路径
class PathSerializer(serializers.ModelSerializer):
class Meta:
model = Path
fields = '__all__'
class JieDuanSerializer(serializers.ModelSerializer):
courses = CourseSerializer(many=True)
class Meta:
model = JieDuan
fields = '__all__'
class PathDeepSerializer(serializers.ModelSerializer):
jieduan = JieDuanSerializer(many=True)
class Meta:
model = Path
fields = '__all__'
3.在course/views中
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 rest_framework.viewsets import ModelViewSet
from .models import *
from .serializers import *
# Create your views here.
class PageNum(PageNumberPagination):
page_size_query_param = 'page_size'
class CourseTypeViewSet(ModelViewSet):
queryset = CourseType.objects.all()
serializer_class = CourseTypeSerializer
class CourseTagViewSet(ModelViewSet):
queryset = CourseTag.objects.all()
serializer_class = CourseTagSerializer
class CourseViewSet(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
# 同时支持过滤和排序
filter_backends = (DjangoFilterBackend,OrderingFilter)
# 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
class SectionsViewSet(ModelViewSet):
queryset = Sections.objects.all()
serializer_class = SectionsSerializer
class ChaptersViewSet(ModelViewSet):
queryset = Chapters.objects.all()
serializer_class = ChaptersSerializer
# 路径视图
class PathViewSet(ModelViewSet):
queryset = Path.objects.all()
serializer_class = PathDeepSerializer
def get_serializer_class(self):
if self.action == 'list':
return PathSerializer
else:
return PathDeepSerializer
4.使用course/admin中
from django.contrib import admin
from course.models import *
# Register your models here.
model_list = [Course,CourseTag,CourseType,Chapters,Sections,Path,JieDuan]
for model in model_list:
admin.site.register(model)
5.配置图片路径
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR,'media')
from django.conf.urls.static import static
from syl import settings
urlpatterns += static(settings.MEDIA_URL,document_root=settings.MEDIA_ROOT)