无法让 Django 视图按类别（外键属性）过滤 objects

Question

所以，我有这个 class 并且想根据类别（这是一个外键）过滤测验列表。我希望视图仅分别显示每个类别的测验，例如 'History'、'Chemistry' 等等。

class QuizListView(generic.ListView):
    #model = Quiz
    queryset = Quiz.objects.filter(Category='History')

型号：

class Quiz(models.Model):

    title = models.CharField(
        verbose_name=_("Titulli"),
        max_length=60, blank=False)

    description = models.TextField(
        verbose_name=_("Përshkrimi"),
        blank=True, help_text=_("a description of the quiz"))

    url = models.SlugField(
        max_length=60, blank=False,
        help_text=_("a user friendly url"),
        verbose_name=_("user friendly url"))

    category = models.ForeignKey(
        Category, null=True, blank=True,
        verbose_name=_("Kategoria"), on_delete=models.CASCADE)

类别class：

class Category(models.Model):

    category = models.CharField(
        verbose_name=_("Category"),
        max_length=250, blank=True,
        unique=True, null=True)

    objects = CategoryManager()

    class Meta:
        verbose_name = _("Kategori")
        verbose_name_plural = _("Kategoritë")

    def __str__(self):
        return self.category

这是终端上的错误：

无法将关键字 'quiz_category' 解析为字段。选项有：answers_at_end、类别 y, category_id, data_postimit, 描述, 草稿, exam_paper, fail_text, id, max_questions, pass_mark, 问题, random_o 顺序，single_attempt，坐着，success_text，标题，url

尝试了其他方法，但似乎无法弄清楚，非常感谢任何帮助

Answer 1

category指的是一个Category对象，如果要过滤相关category对象的category字段的值，就用双下划线(__)，所以：

class QuizListView(generic.ListView):
    model = Quiz
    queryset = Quiz.objects.filter(<b>category__category='History'</b>)

无法让 Django 视图按类别（外键属性）过滤 objects

can't get django views to filter objects by category (foreignkey attribute)

django-models

django-views

django-filters