我使用Django为Post模型创建了post_create和post_detail视图。我想为新帖子创建一个slug，这样在点击post_list中的一些帖子后，他可以重定向到post_detail并生成一个独特的slug。当我运行我的服务器时，它会提出：反转＆＃39; detail＆＃39;参数＆＃39;（）＆＃39;和关键字参数＆＃39; {＆＃39; slug＆＃39;：＆＃39;＆＃39;}＆＃39;未找到。尝试了1种模式：[＆＃39;交易/（？P \ d +）/ $＆＃39;]。如果有人对可能导致此错误的内容有任何指示，我将非常感激。
views.py：
def deal(request):
today = timezone.now().date()
queryset_list = Post.objects.active() #.order_by("-timestamp")
if request.user.is_staff or request.user.is_superuser:
queryset_list = Post.objects.all()
query = request.GET.get("q")
if query:
queryset_list = queryset_list.filter(
Q(from1__icontains=query)|
Q(type_of_truck__icontains=query)|
Q(Material_Name__icontains=query) |
Q(To__icontains=query)|
Q(Material_Type__icontains=query)
).distinct()
paginator = Paginator(queryset_list, 2) # Show 25 contacts per page
page_request_var = "page"
page = request.GET.get(page_request_var)
try:
queryset = paginator.page(page)
except PageNotAnInteger:
# If page is not an integer, deliver first page.
queryset = paginator.page(1)
except EmptyPage:
# If page is out of range (e.g. 9999), deliver last page of results.
queryset = paginator.page(paginator.num_pages)
context = {
"object_list": queryset_list,
"from1": "List",
"page_request_var": page_request_var,
"today": today,
}
return render(request, 'before_login/deal.html', context)
def post_create(request):
# if not request.user.is_staff or not request.user.is_superuser:
# raise Http404
form = PostForm(request.POST or None)
if form.is_valid():
instance = form.save(commit=False)
print(form.cleaned_data.get("from1"))
instance.user = request.user
instance.save()
# message success
messages.success(request, "Successfully Created")
return HttpResponseRedirect(instance.get_absolute_url())
context = {
"form": form,
}
return render(request, "loggedin_load/post_load.html", context)
def post_detail(request, slug=None): #retrieve
#instance = Post.objects.get(id=1)
instance = get_object_or_404(Post, slug=slug)
if instance.date > timezone.now().date():
if not request.user.is_staff or not request.user.is_superuser:
raise Http404
share_string = quote_plus(instance.Material_Type)
context = {
"from1": instance.from1,
"instance": instance,
"share_string": share_string
}
return render(request, "loggedin_load/post_detail.html", context)
urls.py：
url(r'^deal/$', views.deal, name='deal'),
url(r'^deal/(?P<slug>[\w-]+)/$', views.post_detail, name='detail'),
models.py：
class Post(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, default=1)
from1 = models.CharField(max_length=20)
type_of_truck = models.CharField(max_length=20)
date = models.CharField(max_length=20)
slug = models.SlugField(unique=True)
weight = models.DecimalField( max_digits=5, decimal_places=2)
Material_Name = models.CharField(max_length=20)
To = models.CharField(max_length=20)
Number_Of_Truck = models.CharField(max_length=20)
Time = models.CharField(max_length=20)
Volume = models.CharField(max_length=20)
Material_Type = models.CharField(max_length=20)
#updated = models.DateTimeField(auto_now=True, auto_now_add=False)
timestamp = models.DateTimeField(auto_now=False, auto_now_add=True)
objects = PostManager()
def __unicode__(self):
return self.from1
def __str__(self):
return self.from1
def get_absolute_url(self):
return reverse("posts:detail", kwargs={"slug": self.slug})
class Meta:
ordering = ["-timestamp", "-Time"]
def create_slug(instance, new_slug=None):
slug = slugify(instance.id)
if new_slug is not None:
slug = new_slug
qs = Post.objects.filter(slug=slug).order_by("-id")
exists = qs.exists()
if exists:
new_slug = "%s-%s" %(slug, qs.first().id)
return create_slug(instance, new_slug=new_slug)
return slug
def pre_save_post_receiver(sender, instance, *args, **kwargs):
if not instance.slug:
instance.slug = create_slug(instance)
pre_save.connect(pre_save_post_receiver, sender=Post)
deal.html：
{% for obj in object_list %}
<td scope="row">{{obj.date}}</td>
<td> <a href='{{ obj.get_absolute_url }}'>{{ obj.from1 }}</a><br/></td>
<td>{{obj.To}}</td>
<td>{{obj.Material_Type}}</td>
<td>{{obj.type_of_truck}}</td>
<td>{{obj.Number_Of_Truck}}</td>
<td>{{obj.weight}}</td>
<td>Rs. 55000</td>
<td><button type="button" id="bidbutton" class="btn btn-secondary fontsize align-centre bidbutton">Bid</button></td>
</tr>
{% endfor %}
post_detail.html：
{% load urlify %}
{% block head_title %}
{{ instance.from1 }} | {{ block.super }}
{% endblock head_title %}
{% block content %}
<div class='col-sm-6 col-sm-offset-3'>
<!-- <h1>{{ title }} <small>{% if instance.draft %}<span style='color:red;'>Draft</span>{% endif %} -->{{ instance.from1 }}</small></h1>
{% if instance.from1 %}
<p>{{ instance.Material_Type }}</p>
{% endif %}
回溯：
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/deal/
Django Version: 1.9.7
Python Version: 3.4.4
Installed Applications:
['personal',
'custom_user',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'crispy_forms',
'widget_tweaks']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
Template error:
In template C:\Users\sumanth\Desktop\django-custom-user- master\Project\mysite\personal\templates\before_login\deal.html, error at line 78
Reverse for 'detail' with arguments '()' and keyword arguments '{'slug': ''}' not found. 1 pattern(s) tried: ['deal/(?P<slug>[\\w-]+)/$'] 68 : <th>Best Offer</th>
69 : <th></th>
70 : </tr>
71 : </thead>
72 : <tbody>
73 : <tr>
74 : {% for obj in object_list %}
75 :
76 :
77 : <td scope="row">{{obj.date}}</td>
78 : <td> <a href=' {{ obj.get_absolute_url }} '>{{ obj.from1 }}</a><br/></td>
79 : <td>{{obj.To}}</td>
80 : <td>{{obj.Material_Type}}</td>
81 : <td>{{obj.type_of_truck}}</td>
82 : <td>{{obj.Number_Of_Truck}}</td>
83 : <td>{{obj.weight}}</td>
84 : <td>Rs. 55000</td>
85 : <td><button type="button" id="bidbutton" class="btn btn-secondary fontsize align-centre bidbutton">Bid</button></td>
86 : </tr>
87 : {% endfor %}
88 : <!--<tr>
回溯：
File "c:\python34\lib\site-packages\django\core\handlers\base.py" in get_response
149. response = self.process_exception_by_middleware(e, request)
File "c:\python34\lib\site-packages\django\core\handlers\base.py" in get_response
147. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\sumanth\Desktop\django-custom-user-master\Project\mysite\personal\views.py" in deal
70. return render(request, 'before_login/deal.html', context)
File "c:\python34\lib\site-packages\django\shortcuts.py" in render
67. template_name, context, request=request, using=using)
File "c:\python34\lib\site-packages\django\template\loader.py" in render_to_string
97. return template.render(context, request)
File "c:\python34\lib\site-packages\django\template\backends\django.py" in render
95. return self.template.render(context)
File "c:\python34\lib\site-packages\django\template\base.py" in render
206. return self._render(context)
File "c:\python34\lib\site-packages\django\template\base.py" in _render
197. return self.nodelist.render(context)
File "c:\python34\lib\site-packages\django\template\base.py" in render
992. bit = node.render_annotated(context)
File "c:\python34\lib\site-packages\django\template\base.py" in render_annotated
959. return self.render(context)
File "c:\python34\lib\site-packages\django\template\loader_tags.py" in render
173. return compiled_parent._render(context)
File "c:\python34\lib\site-packages\django\template\base.py" in _render
197. return self.nodelist.render(context)
File "c:\python34\lib\site-packages\django\template\base.py" in render
992. bit = node.render_annotated(context)
File "c:\python34\lib\site-packages\django\template\base.py" in render_annotated
959. return self.render(context)
File "c:\python34\lib\site-packages\django\template\loader_tags.py" in render
69. result = block.nodelist.render(context)
File "c:\python34\lib\site-packages\django\template\base.py" in render
992. bit = node.render_annotated(context)
File "c:\python34\lib\site-packages\django\template\base.py" in render_annotated
959. return self.render(context)
File "c:\python34\lib\site-packages\django\template\defaulttags.py" in render
220. nodelist.append(node.render_annotated(context))
File "c:\python34\lib\site-packages\django\template\base.py" in render_annotated
959. return self.render(context)
File "c:\python34\lib\site-packages\django\template\base.py" in render
1043. output = self.filter_expression.resolve(context)
File "c:\python34\lib\site-packages\django\template\base.py" in resolve
709. obj = self.var.resolve(context)
File "c:\python34\lib\site-packages\django\template\base.py" in resolve
850. value = self._resolve_lookup(context)
File "c:\python34\lib\site-packages\django\template\base.py" in _resolve_lookup
913. current = current()
File "C:\Users\sumanth\Desktop\django-custom-user-master\Project\mysite\personal\models.py" in get_absolute_url
47. return reverse("posts:detail", kwargs={"slug": self.slug})
File "c:\python34\lib\site-packages\django\core\urlresolvers.py" in reverse
600. return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs)))
File "c:\python34\lib\site-packages\django\core\urlresolvers.py" in _reverse_with_prefix
508. (lookup_view_s, args, kwargs, len(patterns), patterns))
Exception Type: NoReverseMatch at /deal/
Exception Value: Reverse for 'detail' with arguments '()' and keyword arguments '{'slug': ''}' not found. 1 pattern(s) tried: ['deal/(?P<slug>[\\w-]+)/$']
答案 0 :(得分：2)
请再看一下错误：
使用参数'（）'和关键字参数'{'slug'：＆gt;''}'找不到“详细信息”。尝试了1种模式：['deal /（？P \ d +）/ $']。
您是否识别网址'deal/(?P\d+)/$'？
此网址似乎也具有名称'detail'，并在posts/urls.py网址之前的post_detail中定义。确保您为网址指定的名称是唯一的。
我认为问题中包含的任何代码都在您的posts应用中。
修改
在使用真实数据和回溯更新问题后进行此编辑。
问题是，Posts模型中的所有条目都不是slug。因此，kwarg slug为空，这使reverse失败。每次调用模型的Posts方法时，您都可以定义一种方法，以根据create模型上的其他字段创建唯一的slug。 （您还需要覆盖PostsManager。
您还可以使用pk代替slug来查找Posts个实例。默认情况下，pk可用于所有Django模型。
答案 1 :(得分：1)
我遇到了类似的问题，经过大量研究，我没有得到任何有帮助的答案，我来找我在模板中传递了url，lo和bekeeper的模板，但我没有使用正确的URL进行更改我将路径更改为使用slug而不是pk后的参数。
这是更改前模板中的url路径和url参数：
path('post/<int:pk>/', PostDetailView.as_view(), name='post-detail'),
<a href="{% url 'post-detail' post.pk %}" >
这是下面更改的网址路径和网址参数：
path('post/<str:category>/<str:slug>/', PostDetailView.as_view(), name='post-detail'),
<a href="{% url 'post-detail' post.category post.slug %}" >
我知道这个答案目前可能与您无关，但希望对您有所帮助。
答案 2 :(得分：0)
我不确定您是否需要指定posts:detail，这在模型中应该足够了。您的网址名为detail，因此请尝试detail。
def get_absolute_url(self):
return reverse("detail", kwargs={"slug": self.slug})