我們有以下三種型號。

class Category(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    title = models.CharField(max_length=200)

class CategoryManager(models.Model):
    category = models.ForeignKey(Category, on_delete=models.PROTECT, verbose_name=_('Course Category'), related_name="category_categorymanager")
    manager = models.ForeignKey(_user, verbose_name=_('Category Manager'), on_delete=models.CASCADE, related_name="user_categorymanager")

class Course(models.Model):   
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    title = models.CharField(max_length=200, verbose_name=_('Course Name'))
    ...
    price = models.DecimalField(max_digits=7, decimal_places=2, verbose_name=_('Course Price'), blank=True, null=True)
    slug = models.SlugField(unique=True, blank=True)
    category = models.ForeignKey(Category, related_name='courses_category', on_delete=models.PROTECT)

我們希望通過CategoryManager過濾課程。

@admin.register(Course)
class CourseAdmin(admin.ModelAdmin):
    def get_queryset(self, request):
        category_manager_list=CategoryManager.objects.filter(manager=request.user)
        ... 
        return ....

使用上面獲得的category_manager_list，我們想列出屬于這些類別的所有課程。