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models.py
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models.py
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from django.db import models
from organization.models import CourseOrg,Teacher
# Create your models here.
# 课程信息表
class Course(models.Model):
# 自定义选择规则
DEGREE_CHOICES = (
('cj','初级'),
('zj','中级'),
('gj','高级')
)
course_org = models.ForeignKey(CourseOrg,verbose_name="所属机构",null=True,blank=True)
teacher = models.ForeignKey(Teacher,verbose_name='讲师',null=True,blank=True)
name = models.CharField(max_length=10,verbose_name='课程名')
is_banner = models.BooleanField(default=False,verbose_name='是否轮播')
desc = models.CharField(max_length=520,verbose_name='课程描述')
# TextField允许我们不输入长度。可以输入到无限大。暂时定义为TextFiled，之后更新为富文本
# 修改imagepath,不能传y m 进来，不能加斜杠是一个相对路径，相对于setting中配置的mediaroot
detail = models.TextField(verbose_name="课程详情")
degree = models.CharField(choices=DEGREE_CHOICES,max_length=10,verbose_name="难度")
# 使用分钟数做后台记录(存储最小单位),前台转换
learn_times = models.IntegerField(default=0,verbose_name="学习时长(分钟数)")
# 保存学习人数：从点击开始学习算起
students = models.IntegerField(default=0,verbose_name="学习人数")
fav_nums = models.IntegerField(default=0,verbose_name="收藏人数")
category = models.CharField(max_length=20,verbose_name="课程类别")
you_need_know = models.CharField(max_length=500,default="一颗勤学的心和坚持不懈的精神是本课程必要前提",verbose_name="课程须知")
teacher_tell = models.CharField(max_length=300,default="按时交作业,不然叫家长",verbose_name="老师告诉你")
tag = models.CharField(max_length=15,verbose_name="课程标签")
course_img = models.ImageField(
upload_to="course/%Y/%m",
verbose_name="课程封面",
max_length=100
)
# 保存点击量
click_nums = models.IntegerField(default=0,verbose_name="点击数")
add_time = models.DateField(auto_now_add=True,verbose_name="添加时间")
def get_zj_nums(self):
return self.lesson_set.all().count()
get_zj_nums.short_description = '章节数'
def go_to(self):
from django.utils.safestring import mark_safe
# 如果不mark safe。会对其进行转义
return mark_safe("<a href='http://blog.mtianyan.cn'>跳转</>")
go_to.short_description = "跳转"
def __str__(self):
return self.name
class Meta:
verbose_name = '课程'
verbose_name_plural = verbose_name
# 轮播图
class BannerCourse(Course):
class Meta:
verbose_name = "轮播课程"
verbose_name_plural = verbose_name
proxy = True
# 章节
class Lesson(models.Model):
# 因为一个课程对应很多章节，在章节表中将课程设置为外键.
course = models.ForeignKey(Course,verbose_name="课程")
name = models.CharField(max_length=10,verbose_name="章节名")
add_time = models.DateField(auto_now_add=True,verbose_name="添加时间")
def __str__(self):
return '《{0}》课程的章节 >> {1}'.format(self.course,self.name)
class Meta:
verbose_name = '章节'
verbose_name_plural = verbose_name
# 章节视频
class Video(models.Model):
# 一个章节对应很多视频,所以讲章节设置为外键
lesson = models.ForeignKey(Lesson,verbose_name="章节")
name = models.CharField(max_length=10,verbose_name="视频名")
url = models.CharField(max_length=100,default="https://www.cnblogs.com/Tridents/",verbose_name="访问地址")
# 使用分钟做后台转换(存储最小单位)前台转换
learn_times = models.IntegerField(default=0,verbose_name="学习时长(分钟数)")
add_time = models.DateField(auto_now_add=True,verbose_name="添加时间")
def __str__(self):
return '《{0}》章节的视频 >> {1}'.format(self.lesson,self.name)
class Meta:
verbose_name = '章节视频'
verbose_name_plural = verbose_name
# 课程资源
class CourseResource(models.Model):
# 一个课程对应多个资源，所以在这里将课程设置为外键
course = models.ForeignKey(Course,verbose_name="课程")
name = models.CharField(max_length=10,verbose_name="名称")
# 此处直接定义为文件类型的filed,后台有按钮可直接上传
download = models.FileField(
upload_to="course/resourse/%Y/%m",
verbose_name="资源文件",
max_length=100
)
add_time = models.DateField(auto_now_add=True,verbose_name="添加时间")
def __str__(self):
return '《{0}》课程的资源 >> {1}'.format(self.course,self.name)
class Meta:
verbose_name = '课程资源'
verbose_name_plural = verbose_name