添加courses模块

from django.db import models
from datetime import datetime


# Create your models here.


class Course(models.Model):
    name = models.CharField(max_length=100, verbose_name=‘课程名‘)
    desc = models.CharField(max_length=300, verbose_name=‘课程描述‘)
    detail = models.TextField(verbose_name=‘课程详情‘)
    degree = models.CharField(max_length=10, verbose_name=‘课程难度‘, choices=((‘cj‘, ‘初级‘), (‘zj‘, ‘中级‘), (‘gj‘, ‘高级‘)))
    learn_time = models.IntegerField(default=0, verbose_name=‘学习时长(分钟)‘)
    learn_nums = models.IntegerField(default=0, verbose_name=‘学习人数‘)
    fav_nums = models.IntegerField(default=0, verbose_name=‘收藏人数‘)
    image = models.ImageField(max_length=100, verbose_name=‘封面图‘, upload_to=‘static/uploads/courses/%Y/%m‘)
    click_nums = models.IntegerField(default=0, verbose_name=‘点击数‘)
    add_time = models.DateTimeField(default=datetime.now, verbose_name=‘创建时间‘)

    class Meta:
        verbose_name = ‘课程‘
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.name


class Lesson(models.Model):
    course = models.ForeignKey(Course, on_delete=models.CASCADE, verbose_name=‘课程‘)
    name = models.CharField(max_length=100, verbose_name=‘章节名‘)
    add_time = models.DateTimeField(default=datetime.now, verbose_name=‘创建时间‘)

    class Meta:
        verbose_name = ‘章节‘
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.name


class Video(models.Model):
    lesson = models.ForeignKey(Lesson, on_delete=models.CASCADE, verbose_name=‘章节‘)
    name = models.CharField(max_length=100, verbose_name=‘章节名‘)
    add_time = models.DateTimeField(default=datetime.now, verbose_name=‘创建时间‘)

    class Meta:
        verbose_name = ‘视频‘
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.name


class CourseResource(models.Model):
    course = models.ForeignKey(Course, on_delete=models.CASCADE, verbose_name=‘课程‘)
    name = models.CharField(max_length=100, verbose_name=‘资源名‘)
    download = models.FileField(max_length=100, verbose_name=‘上传文件‘, upload_to=‘static/uploads/courses/%Y/%m‘)
    add_time = models.DateTimeField(default=datetime.now, verbose_name=‘创建时间‘)

    class Meta:
        verbose_name = ‘课程资源‘
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.name