Django：ValueError对于带有基数10的int（）的无效文字

我有两个型号 Post 和 Category .

models.py

class Post(models.Model):
    title = models.CharField(max_length=100, unique=True)
    slug = models.SlugField(max_length=100, unique=True)
    content = models.TextField()
    posted = models.DateField(db_index=True, auto_now_add=True)
    category = models.ForeignKey('blog.Category')

    def __unicode__(self):
        return '%s' % self.title


class Category(models.Model):
    title = models.CharField(max_length=100, db_index=True)
    slug = models.SlugField(max_length=100, db_index=True)

    def __unicode__(self):
        return '%s' % self.title

views.py

def post_view(request, slug, slug1):
    return render(request, 'post_view.html', {
        'post': get_object_or_404(Post, category=slug, slug=slug1)
    })


def category_view(request, slug):
    category = get_object_or_404(Category, slug=slug)
    return render(request, 'cat_view.html', {
        'category': category,
        'posts': Post.objects.filter()[:5]
    })

urls.py

url(r'category/(?P<slug>[-\w]+)/$', views.category_view, name='cat_view'),
    url(r'category/(?P<slug>[-\w]+)/(?P<slug1>[-\w]+)/$', views.post_view, name='post_view'),

最后是模板category.html

{% block content %}

    {% if posts %}
        <ul>
            {% for post in posts %}
                <li><a href="{% url 'blog:post_view' slug=post.category slug1=post.slug %}">
                    {{ post.title }}</a></li>
            {% endfor %}
        </ul>
    {% else %}
        <p>There are no post yet in the {{ category.title }} category ! </p>
    {% endif %}

{% endblock %}

post.html

{% block content %}
    <h1>{{ post.title }}</h1>
    <p>{{ post.content }}</p>
    <small>{{ post.posted }}</small>

{% endblock %}

每当我尝试通过 category.html 上的链接访问特定帖子时，就会出现错误 . 起初我认为这是因为 urls.py 中的正则表达式，但它似乎是查询的问题，我已经坚持了几个小时 . 任何帮助都会很棒 .

UPDATE

回溯：文件“C：\ Python27 \ lib \ site-packages \ django \ core \ handlers \ exception.py”在内部39. response = get_response（request）文件“C：\ Python27 \ lib \ site-packages \ django / core \ handlers \ base.py“in _get_response 187. response = self.process_exception_by_middleware（e，request）_get_response 185中的文件”C：\ Python27 \ lib \ site-packages \ django \ core \ handlers \ base.py“ . response = wrapped_callback（request，* callback_args，** callback_kwargs）post_view 25中的文件“C：\ Users \ godfather \ PycharmProjects \ portfolio \ blog \ views.py”.'post'：get_object_or_404（Post，category = slug，slug = slug1）get_object_or_404中的文件“C：\ Python27 \ lib \ site-packages \ django \ shortcuts.py”85 . return queryset.get（* args，** kwargs）文件“C：\ Python27 \ lib \ site-packages \获取376中的django \ db \ models \ query.py“.clone = self.filter（* args，** kwargs）文件”C：\ Python27 \ lib \ site-packages \ django \ db \ models \ query.py“在过滤器796中 . 返回self.filter_or_exclude（False，* args，** kwargs）文件“C：\ Python27 \ lib \ site-packages \ django \ db \ models \ que ry.py“在_filter_or_exclude 814. clone.query.add_q（Q（* args，** kwargs））文件”C：\ Python27 \ lib \ site-packages \ django \ db \ models \ sql \ query.py“in add_q 1227. clause， = self._add_q（q_object，self.used_aliases）_add_q 1253中的文件“C：\ Python27 \ lib \ site-packages \ django \ db \ models \ sql \ query.py” . allow_joins = allow_joins， split_subq = split_subq，build_filter 1183中的文件“C：\ Python27 \ lib \ site-packages \ django \ db \ models \ sql \ query.py”.condition = lookup_class（lhs，value）文件“C：\ Python27 \ lib \ init-self中的site-packages \ django \ db \ models \ lookups.py“self.rhs = self.get_prep_lookup（）文件”C：\ Python27 \ lib \ site-packages \ django \ db \ models \ fields \ related_lookups . py“in get_prep_lookup 100. self.rhs = target_field.get_prep_value（self.rhs）文件”C：\ Python27 \ lib \ site-packages \ django \ db \ models \ fields__init __ . py“in get_prep_value 946. return int（value）异常类型：ValueError at / category / Computer / python-data-scientists / Exception Value：int（）的文字无效，基数为10：'计算机'