python - Django 2.0 slug urls.py 意外关键字参数 'slug'

Question

该网站非常简单，只有 3 页，主页和 urls.py 中显示的第二个 url 效果很好，但是当我从主题转到单元页面时，我得到:

TypeError at /subjects/units/english

units() got an unexpected keyword argument 'slug'

我不知道为什么会收到此错误.. django 2.0 在 url 和路径中所做的新修改我阅读了文档，但我不明白 <slug>很好，，是吗<slug> or <slug:slug>我不明白，第一个和第二个的含义是什么？？？ .. 在模板文件夹 {% url 'units' item.slug %} 中单位是路径的名称，但是是 -- item.slug -- 对吗？如果有人向我解释它，我将非常感激。

models.py

class Unit(models.Model):
    subject = models.ForeignKey(Subject, on_delete=models.CASCADE)
    name = models.CharField(max_length=250)
    description = models.TextField(blank=True, null=True)
    archived = models.BooleanField(default=False)
    slug = models.SlugField(max_length=250, unique=True)
    created = models.DateTimeField(auto_now_add=True, null=True, blank=True)
    updated = models.DateTimeField(auto_now=True, null=True, blank=True)
    seo_name = models.CharField(max_length=60, blank=True, null=True)
    seo_description = models.CharField(max_length=165, blank=True, 
    null=True)

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

    def __str__(self):
        return self.name

views.py

from django.http import HttpResponse
from django.template import loader
from .models import Subject, Unit, Lesson

def units(request):
    all_units = Unit.objects.filter(active=True).order_by('-id')[:]
    template = loader.get_template('sheets/units.html')
    context = {
        'all_units': all_units
    }
    return HttpResponse(template.render(context, request))

urls.py

from django.urls import path
from .views import subjects, units, lessons

urlpatterns = [
    path('subjects/', subjects, name='subjects'),
    path('units/<slug:slug>', units, name='units'),
    path('lessons/<slug:slug>', lessons, name='lessons'),
]

units.html

    <div class="blog-posts">
        <div class="row  text-center">
            {% for item in all_units %}
                <div class="col-sm-4 wow fadeInUp animated" data-wow-duration="1000ms" data-wow-delay="400ms"
                     style="visibility: visible;animation-duration: 1000ms;animation-delay: 400ms;animation-name: fadeInUp; margin-bottom: 15px">
                    <div class="post-thumb">
                        <a href="#"><img class="img-responsive" src="/static/img/blog/1.jpg" alt=""></a>
                    </div>
                    <div class="entry-header">
                        <h3><a href="{% url 'units' item.slug %}">{{ item.name }}</a></h3>
                        <span class="date">{{ item.created }}</span>
                    </div>
                    <div class="entry-content">
                        <p>{{ item.description|truncatechars:120 }}</p>
                    </div>
                </div>
            {% endfor %}
        </div>
    </div>

Answer 1

def units(request,slug):
    all_units = Unit.objects.filter(active=True).order_by('-id')[:]
    template = loader.get_template('sheets/units.html')
    context = {
        'all_units': all_units
    }
    return HttpResponse(template.render(context, request))

您还需要在 View 函数中传递 slug，因为您在 url 中提到了一个名为 slug 的参数