检查所有对象是否属于列表 django

Question

模板：{% for level in levels %}    {% if level.todo_set.all in tasks %}    <li>        <a href="javascript:;"><img src="{{ level.badge.url }}" alt="" /></a>    </li>    {% else %}    <li>        <a href="javascript:;"><img src="{{ level.locked_badge.url }}" alt="" /></a>    </li>    {% endif %}{% endfor %}视图.py：@login_required(login_url="/account/login/")def StudentPublicProfile(request, pk=None):    student = User.objects.get(pk=pk)    levels = Level.objects.all()    todos = ToDo.objects.all()    list = []    tasks = Task.objects.filter(student=student)    for task in tasks:        list.append(task.todo)    context = {"student": student, "levels": levels, "tasks": list, "todos": todos}    return render(request, "student_public_profile2.html", context)模型.py：class Level(models.Model):    number = models.IntegerField()    badge = models.ImageField()    locked_badge = models.ImageField()    timestamp = models.DateTimeField(        auto_now_add=True, auto_now=False, blank=True, null=True    )    unlock = models.CharField(max_length=10, default="A")    def __str__(self):        return str(self.number)    def get_absolute_url(self):        return reverse("student:level-detail", kwargs={"pk": self.pk})class ToDo(models.Model):    level = models.ForeignKey(Level, on_delete=models.CASCADE)    name = models.CharField(max_length=150)    description = models.TextField()    timestamp = models.DateTimeField(        auto_now_add=True, auto_now=False, blank=True, null=True    )    def __str__(self):        return self.name基本上，每个级别都包含多个待办事项。我想检查该级别的所有待办事项是否都包含在任务列表中。这就是我在模板中所做的。但我没有得到正确的结果。这里可能是什么问题？在这里，我正在检查某个级别的所有待办事项是否都由特定用户完成。只有当待办事项完成时，它才会保存在任务中

Answer 1

您可能最好在view.

for level in levels_list:

    if Todo.objects.filter(level=level).count() == Task.objects.filter(student=student, level=level).count():

        return (level completion code)

Answer 2

levellist = []

for level in levels:

    if (

        ToDo.objects.filter(level=level).count()

        == Task.objects.filter(student=student, level=level).count()

    ):

        levellist.append(level.number)

    perc = (len(levellist) / len(levels)) * 100

在模板中：

{% for level in levels %}

    {% if level.number in levellist %}

    <li>

        <a href="javascript:;"><img src="{{ level.badge.url }}" 

        alt=""/></a>

    </li>

    {% else %}

    <li>

        <a href="javascript:;"><img src="{{ level.locked_badge.url }}" 

        alt=""/></a>

    </li>

    {% endif %}

{% endfor %}

找到了解决办法！