sync from local backup
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chunyu
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import os
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from django.db import models
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from django.conf import settings
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CATEGORY_CHOICES = [
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('frontend', '前端'),
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('backend', '后端'),
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('tools', '工具'),
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('devops', '运维'),
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('security', '安全'),
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('basic', '基础'),
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]
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LEVEL_CHOICES = [
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('beginner', '入门'),
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('advanced', '进阶'),
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]
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STATUS_CHOICES = [
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('published', '已发布'),
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('draft', '草稿'),
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]
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class Course(models.Model):
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title = models.CharField(max_length=200, verbose_name='标题')
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description = models.TextField(blank=True, default='', verbose_name='描述')
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category = models.CharField(max_length=20, choices=CATEGORY_CHOICES, default='frontend')
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level = models.CharField(max_length=10, choices=LEVEL_CHOICES, default='beginner')
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cover_image = models.ImageField(upload_to='learn/covers/%Y/%m/', blank=True, null=True)
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color = models.CharField(max_length=20, default='#667eea', verbose_name='主题色')
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icon_name = models.CharField(max_length=50, default='CodeOutlined', verbose_name='图标名称')
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author = models.ForeignKey(
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settings.AUTH_USER_MODEL,
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on_delete=models.CASCADE,
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related_name='courses',
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verbose_name='作者'
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)
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status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='draft')
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sort_order = models.IntegerField(default=0)
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is_hot = models.BooleanField(default=False)
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is_new = models.BooleanField(default=False)
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created_at = models.DateTimeField(auto_now_add=True)
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updated_at = models.DateTimeField(auto_now=True)
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class Meta:
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ordering = ['-sort_order', '-created_at']
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verbose_name = '课程'
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verbose_name_plural = '课程'
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def __str__(self):
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return self.title
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class Chapter(models.Model):
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VIDEO_SOURCE_CHOICES = [
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('bilibili', 'B站视频'),
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('local', '本地视频'),
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]
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course = models.ForeignKey(Course, on_delete=models.CASCADE, related_name='chapters', verbose_name='课程')
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title = models.CharField(max_length=200)
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sort_order = models.IntegerField(default=0)
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duration = models.CharField(max_length=50, blank=True, default='', verbose_name='时长')
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is_free = models.BooleanField(default=True)
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video_url = models.URLField(max_length=500, blank=True, default='', verbose_name='视频链接')
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video_source = models.CharField(max_length=20, choices=VIDEO_SOURCE_CHOICES, default='bilibili', verbose_name='视频来源')
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video_local = models.FileField(upload_to='learn/videos/%Y/%m/', blank=True, null=True, verbose_name='本地视频文件')
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video_poster = models.ImageField(upload_to='learn/video_posters/%Y/%m/', blank=True, null=True, verbose_name='视频封面')
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created_at = models.DateTimeField(auto_now_add=True)
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updated_at = models.DateTimeField(auto_now=True)
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class Meta:
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ordering = ['sort_order']
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verbose_name = '章节'
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verbose_name_plural = '章节'
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def __str__(self):
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return self.title
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class ChapterContent(models.Model):
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chapter = models.OneToOneField(Chapter, on_delete=models.CASCADE, related_name='content', verbose_name='章节')
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content_md = models.TextField(blank=True, default='', verbose_name='Markdown内容')
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content_html = models.TextField(blank=True, default='', verbose_name='预渲染HTML')
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md_file_path = models.CharField(max_length=500, blank=True, default='', verbose_name='MD文件路径')
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updated_at = models.DateTimeField(auto_now=True)
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class Meta:
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verbose_name = '章节内容'
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verbose_name_plural = '章节内容'
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def __str__(self):
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return f'{self.chapter.title} - 内容'
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def save(self, *args, **kwargs):
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super().save(*args, **kwargs)
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if self.content_md:
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try:
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import markdown
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self.content_html = markdown.markdown(
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self.content_md,
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extensions=['extra', 'codehilite', 'toc', 'tables']
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)
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except ImportError:
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self.content_html = self.content_md.replace('\n', '<br>')
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ChapterContent.objects.filter(pk=self.pk).update(content_html=self.content_html)
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self.export_md_file()
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def export_md_file(self):
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if not self.content_md:
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return
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course_id = self.chapter.course_id
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chapter_id = self.chapter_id
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file_path = os.path.join(
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settings.MEDIA_ROOT,
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'learn', 'courses', str(course_id), 'chapters', f'{chapter_id}.md'
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)
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os.makedirs(os.path.dirname(file_path), exist_ok=True)
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with open(file_path, 'w', encoding='utf-8') as f:
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f.write(self.content_md)
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relative_path = os.path.relpath(file_path, settings.MEDIA_ROOT).replace('\\', '/')
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ChapterContent.objects.filter(pk=self.pk).update(md_file_path=relative_path)
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class ChapterRead(models.Model):
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user = models.ForeignKey(
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settings.AUTH_USER_MODEL,
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on_delete=models.CASCADE,
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related_name='chapter_reads',
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verbose_name='用户'
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)
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chapter = models.ForeignKey(
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Chapter,
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on_delete=models.CASCADE,
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related_name='chapter_reads',
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verbose_name='章节'
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)
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course = models.ForeignKey(
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Course,
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on_delete=models.CASCADE,
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related_name='chapter_reads',
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verbose_name='课程'
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)
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completed = models.BooleanField(default=True, verbose_name='是否已完成')
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completed_at = models.DateTimeField(auto_now_add=True, verbose_name='完成时间')
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updated_at = models.DateTimeField(auto_now=True, verbose_name='更新时间')
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class Meta:
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verbose_name = '章节学习记录'
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verbose_name_plural = '章节学习记录'
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unique_together = ['user', 'chapter']
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ordering = ['-completed_at']
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def __str__(self):
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return f'{self.user} read {self.chapter}'
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class CourseFavorite(models.Model):
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user = models.ForeignKey(
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settings.AUTH_USER_MODEL,
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on_delete=models.CASCADE,
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related_name='course_favorites',
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verbose_name='用户'
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)
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course = models.ForeignKey(
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Course,
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on_delete=models.CASCADE,
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related_name='course_favorites',
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verbose_name='课程'
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)
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created_at = models.DateTimeField(
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auto_now_add=True,
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verbose_name='创建时间'
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)
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class Meta:
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verbose_name = '课程收藏'
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verbose_name_plural = '课程收藏'
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unique_together = ['user', 'course']
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ordering = ['-created_at']
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def __str__(self):
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return f'{self.user} favorites {self.course}'
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class CourseMaterial(models.Model):
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FILE_TYPE_CHOICES = [
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('pdf', 'PDF'),
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('code', '代码'),
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('doc', '文档'),
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('video', '视频'),
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('dataset', '数据集'),
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('zip', '压缩包'),
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('other', '其他'),
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]
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chapter = models.ForeignKey(
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Chapter,
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on_delete=models.CASCADE,
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related_name='materials',
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verbose_name='章节'
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)
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title = models.CharField(max_length=200, verbose_name='资料名称')
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file = models.FileField(upload_to='learn/materials/%Y/%m/', verbose_name='文件')
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file_type = models.CharField(max_length=20, choices=FILE_TYPE_CHOICES, default='other', verbose_name='文件类型')
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file_size = models.PositiveIntegerField(default=0, verbose_name='文件大小（字节）')
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download_count = models.PositiveIntegerField(default=0, verbose_name='下载次数')
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sort_order = models.IntegerField(default=0, verbose_name='排序')
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created_at = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
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class Meta:
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ordering = ['sort_order']
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verbose_name = '课程资料'
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verbose_name_plural = '课程资料'
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def __str__(self):
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return self.title
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