假设你有两个模型，一个类别和一个帖子 （很像一个项目和一个任务）：

class Category(models.Model):
    name = ...
    ...

class Post(models.Model):
    title = ...
    category = models.ForeignKey(... related_name = "posts")
    ...

您可以将类别传递给模板，如下所示：

def view(request):
    # get all categories
    cats = Category.objects.all().prefetch_related("posts") 
    # using prefetch related to prevent lazy-loading of queries, 
    # this might give a tiny performance increase reducing amount 
    # of database queries

    # render the template
    render(...., {"category":cats})

在模板中，您可以执行以下操作：

{% for category in categories %}
    {{category.name}}
    {% for post in category.posts.all %}
        {{post.title}}
    {% endfor %}
{% endfor %}