课程表分析

class Course(models.Model):name = models.CharField(max_length=64)title = models.CharField(max_length=64)students = models.IntegerField(default=0)level = models.IntegerField(choices=((0, '入门'), (1, '进阶')), default=0)time = models.IntegerField(default=0)detail = models.TextField()  # 可以关联详情表type = models.IntegerField(choices=((0, 'Python'), (1, 'Linux')), default=0)is_show = models.BooleanField(default=False)class Meta:abstract = True# 免费课
class FreeCourse(Course):image = models.ImageField(upload_to='course/free')attachment = models.FileField(upload_to='attachment')# 实战课
class ActualCourse(Course):image = models.ImageField(upload_to='course/actual')price = models.DecimalField(max_digits=7, decimal_places=2)cost = models.DecimalField(max_digits=7, decimal_places=2)# 轻课
class LightCourse(Course):image = models.ImageField(upload_to='course/light')price = models.DecimalField(max_digits=7, decimal_places=2)cost = models.DecimalField(max_digits=7, decimal_places=2)period = models.IntegerField(verbose_name='学习建议周期(month)', default=0)# 评论表：分三个表、(id，ctx，date，user_id，free_course_id, comment_id)
# 老师表：在课程表建立多对一外键
# 章节表：在章节表建立多对一外键关联课程
# 课时表：在课时表建立多对一外键关联章节

免费课案例

创建models：course/models.py

class CourseCategory(BaseModel):"""分类"""name = models.CharField(max_length=64, unique=True, verbose_name="分类名称")class Meta:db_table = "luffy_course_category"verbose_name = "分类"verbose_name_plural = verbose_namedef __str__(self):return "%s" % self.name

class Course(BaseModel):"""课程"""course_type = ((0, '付费'),(1, 'VIP专享'),(2, '学位课程'))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")# 使用这个字段的原因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")course_category = models.ForeignKey("CourseCategory", on_delete=models.SET_NULL, db_constraint=False, null=True, blank=True,verbose_name="课程分类")students = models.IntegerField(verbose_name="学习人数", default=0)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")class Meta:db_table = "luffy_course"verbose_name = "课程"verbose_name_plural = "课程"def __str__(self):return "%s" % self.name

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_namedef __str__(self):return "%s" % self.name

class CourseChapter(BaseModel):"""章节"""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_namedef __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")orders = models.PositiveSmallIntegerField(verbose_name="课时排序")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_namedef __str__(self):return "%s-%s" % (self.chapter, self.name)

注册models：course/adminx.py

import xadmin
from . import models
xadmin.site.register(models.CourseCategory)
xadmin.site.register(models.Course)
xadmin.site.register(models.Teacher)
xadmin.site.register(models.CourseChapter)
xadmin.site.register(models.CourseSection)

数据库迁移

>: python manage.py makemigrations
>: python manage.py migrate