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  • -课程主页之课程表分析

    课程表分析

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    classCourse(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)

    classMeta:
            abstract = True

    # 免费课
    classFreeCourse(Course):
        image = models.ImageField(upload_to='course/free')
        attachment = models.FileField(upload_to='attachment')

    # 实战课
    classActualCourse(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
    classLightCourse(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
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    classCourseCategory(BaseModel):
        """分类"""
        name = models.CharField(max_length=64, unique=True, verbose_name="分类名称")
        classMeta:
            db_table = "luffy_course_category"
            verbose_name = "分类"
            verbose_name_plural = verbose_name

        def__str__(self):
            return "%s" % self.name
    		 
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    classCourse(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")

    classMeta:
            db_table = "luffy_course"
            verbose_name = "课程"
            verbose_name_plural = "课程"

    def__str__(self):
    return"%s" % self.name
    		 
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    classTeacher(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")

        classMeta:
            db_table = "luffy_teacher"
            verbose_name = "导师"
            verbose_name_plural = verbose_name

        def__str__(self):
            return "%s" % self.name
    		 
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    classCourseChapter(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)

        classMeta:
            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)
    		 
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    classCourseSection(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)

    classMeta:
            db_table = "luffy_course_Section"
            verbose_name = "课时"
            verbose_name_plural = verbose_name

    def__str__(self):
    return"%s-%s" % (self.chapter, self.name)
    注册models：course/adminx.py
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    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
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    >: python manage.py makemigrations
    >: python manage.py migrate
    每天逼着自己写点东西，终有一天会为自己的变化感动的。这是一个潜移默化的过程，每天坚持编编故事，自己不知不觉就会拥有故事人物的特质的。 Explicit is better than implicit.(清楚优于含糊)
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  • 原文地址：https://www.cnblogs.com/kylin5201314/p/14315455.html
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