如何在一个 DetailView 中组合多个模型

Question

我有 3 个模型 Course、CourseSection、SectionVideo，最后 2 个模型连接到 Course 模型。我想为课程创建 DetailView，它将包含所有模型，我的意思是我可以在其中显示部分内部和内部部分显示视频。该怎么做？

class Course(models.Model):
    title = models.CharField(max_length=255)
    slug = models.SlugField(max_length=150, null=True, blank=True)
    description = models.TextField()
    image = models.ImageField(upload_to='courses/course_images',blank=True,null=True)
    cover = models.ImageField(upload_to='courses/course_covers',blank=True,null=True)
    tutor = models.ForeignKey(User,related_name='tutor_courses',on_delete=models.CASCADE,null=True)
    students = models.ForeignKey(User,related_name='course_students',blank=True,on_delete=models.CASCADE,null=True)
    created = models.DateTimeField(default=timezone.now)
    updated = models.DateTimeField(auto_now=True)
    category = models.ForeignKey(CourseCategories,on_delete=models.CASCADE)
    certificate = models.ImageField(upload_to='courses/course_certificates',blank=True,null=True)
    languages = LanguageField(blank=True)
    rank_score = models.FloatField(default=0.0)
    price = models.FloatField(default=0.0)
    discount_price = models.FloatField(blank=True, null=True)

class CourseSections(models.Model):
    title = models.CharField(max_length=50)
    course = models.ForeignKey(Course,on_delete=models.CASCADE,null=True)

class SectionVideos(models.Model):
    video = models.FileField(upload_to='courses/course_videos',max_length=100)
    section = models.ForeignKey(CourseSections,on_delete=models.CASCADE,null=True)

Answer 1

您可以将 DetailView 用于最顶层的实体（您的示例中的课程）https://docs.djangoproject.com/en/3.0/ref/class-based-views/generic-display/

然后重写get_context_data()并将相关信息添加到上下文中，然后在模板中就可以正常访问了。

官方文档中的一个例子：https://docs.djangoproject.com/en/3.0/topics/class-based-views/generic-display/#making-friendly-template-contexts