1.建立course文件夹
/1 cmd中进入到apps路径下
输入 python ../../manage.py startapp courses 创建出course app/2 记得在dev中注册app
2.创建课程的相关表
from django.db import models
from utils.common_models import BaseModel # 继承基表
# 课程分类表
class CourseCategory(BaseModel):
# 分类和id可以不写
name = models.CharField(max_length=64, unique=True, verbose_name="分类名称") # verbose_name是给后台管理看的，类似于注释的作用
class Meta:
db_table = "luffy_course_category"
verbose_name = "课程分类"
verbose_name_plural = verbose_name
def __str__(self):
return "%s" % self.name
# 课程表
class Course(BaseModel):
"""课程"""
course_type = (
(0, '付费'),
(1, 'VIP专享'),
)
level_choices = (
(0, '初级'),
(1, '中级'),
(2, '高级'),
)
status_choices = (
(0, '上线'),
(1, '下线'),
(2, '预上线'),
)
name = models.CharField(max_length=128, verbose_name="课程名称")
course_img = models.ImageField(upload_to="courses", max_length=255, verbose_name="封面图片", blank=True, null=True)
course_type = models.SmallIntegerField(choices=course_type, default=0, verbose_name="付费类型")
brief = models.TextField(max_length=2048, verbose_name="详情介绍", null=True, blank=True)
level = models.SmallIntegerField(choices=level_choices, default=0, verbose_name="难度等级")
pub_date = models.DateField(verbose_name="发布日期", auto_now_add=True)
period = models.IntegerField(verbose_name="建议学习周期(day)", default=7)
attachment_path = models.FileField(upload_to="attachment", max_length=128, verbose_name="课件路径", blank=True,
null=True)
status = models.SmallIntegerField(choices=status_choices, default=0, verbose_name="课程状态")
students = models.IntegerField(verbose_name="学习人数", default=0) # 优化字段
sections = models.IntegerField(verbose_name="总课时数量", default=0)
pub_sections = models.IntegerField(verbose_name="课时更新数量", default=0)
price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程原价", default=0)
teacher = models.ForeignKey("Teacher", on_delete=models.DO_NOTHING, null=True, blank=True, verbose_name="授课老师")
course_category = models.ForeignKey("CourseCategory", on_delete=models.SET_NULL, db_constraint=False, null=True,
blank=True, verbose_name="课程分类")
class Meta:
db_table = "luffy_course"
verbose_name = "课程"
verbose_name_plural = "课程"
def __str__(self):
return "%s" % self.name
# 章节
class CourseChapter(BaseModel):
"""章节"""
'''
基于对象的跨表查询：正：字段 反：表名小写（一对一是 表名小写，一对多 表名小写_set.all()）
-related_name='coursechapters' 基于对象跨表查反向查询，替换表名小写
基于双下划线的连表查询：正：字段 反：表名小写
-related_query_name='xxx' 基于连表查反向查询，替换表名小写
'''
# related_name='coursechapters'
course = models.ForeignKey("Course", related_name='coursechapters', on_delete=models.CASCADE,
verbose_name="课程名称")
chapter = models.SmallIntegerField(verbose_name="第几章", default=1)
name = models.CharField(max_length=128, verbose_name="章节标题")
summary = models.TextField(verbose_name="章节介绍", blank=True, null=True)
pub_date = models.DateField(verbose_name="发布日期", auto_now_add=True)
class Meta:
db_table = "luffy_course_chapter"
verbose_name = "章节"
verbose_name_plural = verbose_name
def __str__(self):
return "%s:(第%s章)%s" % (self.course, self.chapter, self.name)
class CourseSection(BaseModel):
"""课时"""
section_type_choices = (
(0, '文档'),
(1, '练习'),
(2, '视频')
)
chapter = models.ForeignKey("CourseChapter", related_name='coursesections', on_delete=models.CASCADE,verbose_name="课程章节")
name = models.CharField(max_length=128, verbose_name="课时标题")
section_type = models.SmallIntegerField(default=2, choices=section_type_choices, verbose_name="课时种类")
section_link = models.CharField(max_length=255, blank=True, null=True, verbose_name="课时链接",
help_text="若是video，填vid,若是文档，填link")
duration = models.CharField(verbose_name="视频时长", blank=True, null=True, max_length=32) # 仅在前端展示使用
pub_date = models.DateTimeField(verbose_name="发布时间", auto_now_add=True)
free_trail = models.BooleanField(verbose_name="是否可试看", default=False)
class Meta:
db_table = "luffy_course_section"
verbose_name = "课时"
verbose_name_plural = verbose_name
def __str__(self):
return "%s-%s" % (self.chapter, self.name)
#老师表
class Teacher(BaseModel):
"""导师"""
role_choices = (
(0, '讲师'),
(1, '导师'),
(2, '班主任'),
)
name = models.CharField(max_length=32, verbose_name="导师名")
role = models.SmallIntegerField(choices=role_choices, default=0, verbose_name="导师身份")
title = models.CharField(max_length=64, verbose_name="职位、职称")
signature = models.CharField(max_length=255, verbose_name="导师签名", help_text="导师签名", blank=True, null=True)
image = models.ImageField(upload_to="teacher", null=True, verbose_name="导师封面")
brief = models.TextField(max_length=1024, verbose_name="导师描述")
class Meta:
db_table = "luffy_teacher"
verbose_name = "导师"
verbose_name_plural = verbose_name
def __str__(self):
return "%s" % self.name3.将表录入后台管理系统中
在admin.py中注册
admin.site.register(Teacher)
admin.site.register(CourseCategory)
admin.site.register(Course)
admin.site.register(CourseSection)
admin.site.register(CourseChapter)4.导入课程相关的数据到表中
5.创建查找课程的视图类
查看所有课程的接口
from rest_framework.viewsets import GenericViewSet
from utils.common_mixin import ListModelMixin
from .models import CourseCategory
from .serializer import CourseCategorySerializer
class CourseCategoryView(GenericViewSet,ListModelMixin):
queryset = CourseCategory.objects.filter(is_delete=False,is_show=True).order_by('orders')
serializer_class = CourseCategorySerializer6.创建课程的序列化类
from rest_framework import serializers
from .models import CourseCategory
class CourseCategorySerializer(serializers.ModelSerializer):
class Meta:
model = CourseCategory
fields = ['id','name'] # 选中需要用到的字段