Question

models.py

class Tag(models.Model):
    name = models.CharField(max_length=64, unique=True)     
    slug = models.SlugField(max_length=255, unique=True)

    def save(self, *args, **kwargs):
        self.slug = slugify(self.name)
        super(Tag, self).save(*args, **kwargs)

urls.py

url(r'^tag/(?P<slug>[A-Za-z0-9_\-]+)/$', TagDetailView.as_view(), name='tag_detail'),

views.py

class TagDetailView(DetailView):
    template_name = 'tag_detail_page.html'
    context_object_name = 'tag'

嗯，我认为这可以毫无问题地工作，因为Django的通用DetailView将寻找“slug”或“pk”来获取它的对象。但是，导航到“localhost / tag / RandomTag”会给我一个错误：

错误：

ImproperlyConfigured at /tag/RandomTag/

TagDetailView is missing a queryset. Define TagDetailView.model, TagDetailView.queryset, or override TagDetailView.get_queryset().

有谁知道为什么会这样...... ???

感谢!!!

Answer 1

因为Django的通用DetailView会寻找“slug”或“pk”来获取它的对象

会的，但你还没告诉它使用什么型号。错误很明显：

定义TagDetailView.model，TagDetailView.queryset或覆盖TagDetailView.get_queryset（）。

您可以使用model或queryset属性执行此操作，或使用get_queryset()方法：

class TagDetailView(...):
    # The model that this view will display data for.Specifying model = Foo 
    # is effectively the same as specifying queryset = Foo.objects.all().
    model = Tag

    # A QuerySet that represents the objects. If provided, 
    # the value of queryset supersedes the value provided for model.
    queryset = Tag.objects.all()

    # Returns the queryset that will be used to retrieve the object that this 
    # view will display. By default, get_queryset() returns the value of the
    # queryset attribute if it is set, otherwise it constructs a QuerySet by 
    # calling the all() method on the model attribute’s default manager.
    def get_queryset():
        ....

有几种不同的方法可以告诉视图您希望它从何处抓取您的对象，因此请阅读the docs了解更多

在Django DetailView中使用“Slug”时遇到麻烦

1 个答案: