一. 表字段及关系
from django.db import models
from utils.models import BaseModel
# 课程分类，课程，老师，章节，课时
class CourseCategory(BaseModel):
"""分类表"""
# 模型字段
name = models.CharField(max_length=64, unique=True, verbose_name="分类名称")
# 表信息声明
class Meta:
db_table = "luffy_course_category"
verbose_name = "分类"
verbose_name_plural = verbose_name
# 自定义方法
def __str__(self):
return "%s" % self.name
class Course(BaseModel):
"""课程表"""
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")
# blank 后台管理录入可以为空，null存到数据库字段可以为空
course_img = models.ImageField(upload_to="courses", max_length=255, verbose_name="封面图片", blank=True, null=True)
# 付费类型
course_type = models.SmallIntegerField(choices=course_type, default=0, verbose_name="付费类型")
# TextField 大文本， 存html
brief = models.TextField(max_length=2048, verbose_name="详情介绍", null=True, blank=True)
# 难度等级
level = models.SmallIntegerField(choices=level_choices, default=0, verbose_name="难度等级")
# 发布日期
pub_date = models.DateField(verbose_name="发布日期", auto_now_add=True)
# 建议学习周期
period = models.IntegerField(verbose_name="建议学习周期(day)", default=7)
#课件路径
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")
# 优化字段
students = models.IntegerField(verbose_name="学习人数", default=0)
# 课程一边录，一边传
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)
# 外键关联的好处和坏处
# -好处在于 插入修改数据，有校验，能够保证数据不会错乱，不会出现脏数据
# -坏处在于 有校验，速度慢，数量越大，越慢，咱们可以通过程序控制不加入脏数据
# 公司内部为了效率，一般不建立外键关联，关系在 ，只是没有那条线了
# 在django中不建立外键关联，只是不创建外键，关联关系还在【关联查询】，也是使用ForeignKey，只是加一个参数，加了之后，没有约束，但你们关系还在
teacher = models.ForeignKey("Teacher", on_delete=models.DO_NOTHING, null=True, blank=True, verbose_name="授课老师",db_constraint=False)
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
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.name
class CourseChapter(BaseModel):
"""章节"""
# 跟课程一对多，一个课程多个章节，关联字段写在多的一方
# related_name='coursechapters' 反向操作时，使用的字段名，用于代替原反向查询时的’表名_set’
# 拿课程下所有章节 course.coursechapter_set.all() course.coursechapters.all()
# related_query_name='字符串' 反向查询操作时，使用的连接前缀，用于替换表名
# __ 连表查询 __表名小写__ __字符串__
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):
# 可能会出异常
try:
return "%s:(第%s章)%s" % (self.course, self.chapter, self.name)
except Exception as e:
return "未知课程:(第%s章)%s" % (self.chapter, self.name)
class CourseSection(BaseModel):
"""课时"""
section_type_choices = (
(0, '文档'),
(1, '练习'),
(2, '视频')
)
# 课时跟章节一对多，关联字段写在多的一方
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)
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)
# 表中字段不需要特别重视：只需要重视关联字段，字段多一个少一个都很正常，重视常用的几个字段即可
二. 插入的五个表
2.1 教师表
-- 老师表--
INSERT INTO luffy_teacher(id, orders, is_show, is_delete, created_time, updated_time, name, role, title, signature, image, brief) VALUES (1, 1, 1, 0, '2019-07-14 13:44:19.661327', '2019-07-14 13:46:54.246271', 'Alex', 1, '老男孩Python教学总监', '金角大王', 'teacher/alex_icon.png', '老男孩教育CTO & CO-FOUNDER 国内知名PYTHON语言推广者 51CTO学院2016\2017年度最受学员喜爱10大讲师之一 多款开源软件作者 曾任职公安部、飞信、中金公司、NOKIA中国研究院、华尔街英语、ADVENT、汽车之家等公司');
INSERT INTO luffy_teacher(id, orders, is_show, is_delete, created_time, updated_time, name, role, title, signature, image, brief) VALUES (2, 2, 1, 0, '2019-07-14 13:45:25.092902', '2019-07-14 13:45:25.092936', 'Mjj', 0, '前美团前端项目组架构师', NULL, 'teacher/mjj_icon.png', '是马JJ老师, 一个集美貌与才华于一身的男人，搞过几年IOS，又转了前端开发几年，曾就职于美团网任高级前端开发，后来因为不同意王兴(美团老板)的战略布局而出家做老师去了，有丰富的教学经验，开起车来也毫不含糊。一直专注在前端的前沿技术领域。同时，爱好抽烟、喝酒、烫头(锡纸烫)。 我的最爱是前端，因为前端妹子多。');
INSERT INTO luffy_teacher(id, orders, is_show, is_delete, created_time, updated_time, name, role, title, signature, image, brief) VALUES (3, 3, 1, 0, '2019-07-14 13:46:21.997846', '2019-07-14 13:46:21.997880', 'Lyy', 0, '老男孩Linux学科带头人', NULL, 'teacher/lyy_icon.png', 'Linux运维技术专家，老男孩Linux金牌讲师，讲课风趣幽默、深入浅出、声音洪亮到爆炸');
2.2 课程表
-- 课程表--
INSERT INTO luffy_course(id, orders, is_show, is_delete, created_time, updated_time, name, course_img, course_type, brief, level, pub_date, period, attachment_path, status, students, sections, pub_sections, price, course_category_id, teacher_id) VALUES (1, 1, 1, 0, '2019-07-14 13:54:33.095201', '2019-07-14 13:54:33.095238', 'Python开发21天入门', 'courses/alex_python.png', 0, 'Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土', 0, '2019-07-14', 21, '', 0, 231, 120, 120, 0.00, 1, 1);
INSERT INTO luffy_course(id, orders, is_show, is_delete, created_time, updated_time, name, course_img, course_type, brief, level, pub_date, period, attachment_path, status, students, sections, pub_sections, price, course_category_id, teacher_id) VALUES (2, 2, 1, 0, '2019-07-14 13:56:05.051103', '2019-07-14 13:56:05.051142', 'Python项目实战', 'courses/mjj_python.png', 0, '', 1, '2019-07-14', 30, '', 0, 340, 120, 120, 99.00, 1, 2);
INSERT INTO luffy_course(id, orders, is_show, is_delete, created_time, updated_time, name, course_img, course_type, brief, level, pub_date, period, attachment_path, status, students, sections, pub_sections, price, course_category_id, teacher_id) VALUES (3, 3, 1, 0, '2019-07-14 13:57:21.190053', '2019-07-14 13:57:21.190095', 'Linux系统基础5周入门精讲', 'courses/lyy_linux.png', 0, '', 0, '2019-07-14', 25, '', 0, 219, 100, 100, 39.00, 2, 3);
-- 后增 --
INSERT INTO `luffy_course` VALUES ('4', '2022-04-28 12:06:36.564933', '2022-04-28 12:36:04.812789', '0', '1', '4', 'DRF从入门到放弃', 'courses/drf.png', '0', 'drf很牛逼', '4', '2022-04-28', '7', '', '0', '399', '0', '0', '77.00', '1', '1');
INSERT INTO `luffy_course` VALUES ('5', '2022-04-28 12:35:44.319734', '2022-04-28 12:35:44.319757', '0', '1', '5', 'Go语言从入门到入坑', 'courses/msbd.png', '0', 'Go语言从入门到入坑Go语言从入门到入坑Go语言从入门到入坑Go语言从入门到入坑', '0', '2022-04-28', '20', '', '0', '30', '200', '100', '66.00', '3', '1');
INSERT INTO `luffy_course` VALUES ('6', '2022-04-28 12:39:55.562716', '2022-04-28 12:39:55.562741', '0', '1', '6', 'Go语言微服务', 'courses/celery.png', '0', 'Go语言微服务Go语言微服务Go语言微服务Go语言微服务', '4', '2022-04-28', '7', '', '0', '122', '0', '0', '299.00', '3', '2');
2.3 课程分类表
-- 分类表--
INSERT INTO luffy_course_category(id, orders, is_show, is_delete, created_time, updated_time, name) VALUES (1, 1, 1, 0, '2019-07-14 13:40:58.690413', '2019-07-14 13:40:58.690477', 'Python');
INSERT INTO luffy_course_category(id, orders, is_show, is_delete, created_time, updated_time, name) VALUES (2, 2, 1, 0, '2019-07-14 13:41:08.249735', '2019-07-14 13:41:08.249817', 'Linux');
INSERT INTO `luffy_course_category` VALUES ('3', '2022-04-28 12:07:33.314057', '2022-04-28 12:07:33.314088', '0', '1', '3', 'Go语言');
2.4 章节表
-- 课程章节--
INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (1, 1, 1, 0, '2019-07-14 13:58:34.867005', '2019-07-14 14:00:58.276541', 1, '计算机原理', '', '2019-07-14', 1);
INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (2, 2, 1, 0, '2019-07-14 13:58:48.051543', '2019-07-14 14:01:22.024206', 2, '环境搭建', '', '2019-07-14', 1);
INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (3, 3, 1, 0, '2019-07-14 13:59:09.878183', '2019-07-14 14:01:40.048608', 1, '项目创建', '', '2019-07-14', 2);
INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (4, 4, 1, 0, '2019-07-14 13:59:37.448626', '2019-07-14 14:01:58.709652', 1, 'Linux环境创建', '', '2019-07-14', 3);
-- 后增 --
INSERT INTO `luffy_course_chapter` VALUES ('5', '2022-04-28 12:08:36.679922', '2022-04-28 12:08:36.680014', '0', '1', '2', '2', 'Linux5周第二章', 'Linux5周第二章Linux5周第二章Linux5周第二章Linux5周第二章Linux5周第二章', '2022-04-28', '3');
INSERT INTO `luffy_course_chapter` VALUES ('6', '2022-04-28 12:09:19.324504', '2022-04-28 12:09:19.324533', '0', '1', '2', '2', 'py实战项目第二章', 'py实战项目第二章py实战项目第二章py实战项目第二章py实战项目第二章', '2022-04-28', '2');
INSERT INTO `luffy_course_chapter` VALUES ('7', '2022-04-28 12:09:32.532905', '2022-04-29 10:11:57.546455', '0', '1', '3', '3', 'py实战项目第三章', 'py实战项目第三章py实战项目第三章py实战项目第三章', '2022-04-28', '2');
INSERT INTO `luffy_course_chapter` VALUES ('8', '2022-04-28 12:09:55.496622', '2022-04-28 12:09:55.496686', '0', '1', '1', '1', 'drf入门1', 'drf入门1drf入门1drf入门1', '2022-04-28', '4');
INSERT INTO `luffy_course_chapter` VALUES ('9', '2022-04-28 12:10:08.490618', '2022-04-28 12:10:08.490642', '0', '1', '2', '2', 'drf入门2', 'drf入门drf入门1drf入门1drf入门1drf入门1', '2022-04-28', '4');
INSERT INTO `luffy_course_chapter` VALUES ('10', '2022-04-28 12:10:22.088684', '2022-04-28 12:10:22.088710', '0', '1', '3', '3', 'drf入门3', 'drf入门1drf入门1drf入门1drf入门1drf入门1drf入门1', '2022-04-28', '4');
INSERT INTO `luffy_course_chapter` VALUES ('11', '2022-04-28 12:10:33.564141', '2022-04-28 12:10:33.564177', '0', '1', '4', '4', 'drf入门4', 'drf入门1drf入门1drf入门1drf入门1', '2022-04-28', '4');
INSERT INTO `luffy_course_chapter` VALUES ('12', '2022-04-28 12:10:43.242918', '2022-04-28 12:10:43.242947', '0', '1', '5', '5', 'drf入门5', 'drf入门1drf入门1drf入门1drf入门1', '2022-04-28', '4');
INSERT INTO `luffy_course_chapter` VALUES ('13', '2022-04-28 12:36:58.508995', '2022-04-28 12:36:58.509020', '0', '1', '1', '1', 'go第一章', 'go第一章', '2022-04-28', '5');
INSERT INTO `luffy_course_chapter` VALUES ('14', '2022-04-28 12:37:08.588265', '2022-04-28 12:37:08.588287', '0', '1', '2', '2', 'go第二章', 'go第一章go第一章go第一章', '2022-04-28', '5');
INSERT INTO `luffy_course_chapter` VALUES ('15', '2022-04-28 12:37:19.219405', '2022-04-28 12:37:19.219426', '0', '1', '3', '3', 'go第三章', 'go第一章go第一章go第一章', '2022-04-28', '5');
INSERT INTO `luffy_course_chapter` VALUES ('16', '2022-04-28 12:40:11.445750', '2022-04-28 12:40:11.445774', '0', '1', '1', '1', '微服务第一章', '微服务第一章', '2022-04-28', '6');
INSERT INTO `luffy_course_chapter` VALUES ('17', '2022-04-28 12:40:22.811647', '2022-04-28 12:40:22.811670', '0', '1', '2', '2', '微服务第二章', '微服务第二章微服务第二章微服务第二章', '2022-04-28', '6');
2.5 课时表
-- 课时表 --
INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (1, 1, 0, '2019-07-14 14:02:33.779098', '2019-07-14 14:02:33.779135', '计算机原理上', 1, 2, NULL, NULL, '2019-07-14 14:02:33.779193', 1, 1);
INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (2, 1, 0, '2019-07-14 14:02:56.657134', '2019-07-14 14:02:56.657173', '计算机原理下', 2, 2, NULL, NULL, '2019-07-14 14:02:56.657227', 1, 1);
INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (3, 1, 0, '2019-07-14 14:03:20.493324', '2019-07-14 14:03:52.329394', '环境搭建上', 1, 2, NULL, NULL, '2019-07-14 14:03:20.493420', 0, 2);
INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (4, 1, 0, '2019-07-14 14:03:36.472742', '2019-07-14 14:03:36.472779', '环境搭建下', 2, 2, NULL, NULL, '2019-07-14 14:03:36.472831', 0, 2);
INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (5, 1, 0, '2019-07-14 14:04:19.338153', '2019-07-14 14:04:19.338192', 'web项目的创建', 1, 2, NULL, NULL, '2019-07-14 14:04:19.338252', 1, 3);
INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (6, 1, 0, '2019-07-14 14:04:52.895855', '2019-07-14 14:04:52.895890', 'Linux的环境搭建', 1, 2, NULL, NULL, '2019-07-14 14:04:52.895942', 1, 4);
-- 新增--
INSERT INTO `luffy_course_section` VALUES ('7', '2022-04-28 12:12:01.304920', '2022-04-28 12:12:01.304994', '0', '1', '文件操作', '2', '2', null, null, '2022-04-28 12:12:01.305074', '0', '5');
INSERT INTO `luffy_course_section` VALUES ('8', '2022-04-28 12:12:11.287759', '2022-04-28 12:12:11.287884', '0', '1', '软件操作', '2', '2', null, null, '2022-04-28 12:12:11.288079', '0', '5');
INSERT INTO `luffy_course_section` VALUES ('9', '2022-04-28 12:12:26.326077', '2022-04-28 12:12:26.326112', '0', '1', '请求响应', '1', '2', null, null, '2022-04-28 12:12:26.326174', '0', '8');
INSERT INTO `luffy_course_section` VALUES ('10', '2022-04-28 12:12:36.364356', '2022-04-28 12:12:36.364391', '0', '1', '序列化类', '2', '2', null, null, '2022-04-28 12:12:36.364446', '0', '8');
INSERT INTO `luffy_course_section` VALUES ('11', '2022-04-28 12:12:48.306119', '2022-04-28 12:12:48.306187', '0', '1', '三大认证', '1', '2', null, null, '2022-04-28 12:12:48.306396', '0', '9');
INSERT INTO `luffy_course_section` VALUES ('12', '2022-04-28 12:13:06.882558', '2022-04-28 12:13:06.882620', '0', '1', '认证', '2', '2', null, null, '2022-04-28 12:13:06.882826', '0', '9');
INSERT INTO `luffy_course_section` VALUES ('13', '2022-04-28 12:13:15.799043', '2022-04-28 12:13:15.799084', '0', '1', 'jwt认证', '1', '2', null, null, '2022-04-28 12:13:15.799146', '0', '10');
INSERT INTO `luffy_course_section` VALUES ('14', '2022-04-28 12:13:27.852981', '2022-04-28 12:13:27.853011', '0', '1', 'jwt认证2', '3', '2', null, null, '2022-04-28 12:13:27.853066', '0', '10');
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INSERT INTO `luffy_course_section` VALUES ('23', '2022-04-28 12:38:13.144613', '2022-04-28 12:38:13.144636', '0', '1', 'go结构体', '1', '2', null, null, '2022-04-28 12:38:13.144679', '0', '15');
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