Question

我对Django很陌生，我花了好几个小时尝试可能的解决方案。
我的观点需要一个小兵：

def inventory(request, id):
    model = Inventory
    # thing = Inventory.objects.get(pk=id) 
    if request.method == "POST":
        stuff = Inventory.objects.get(id=id)
        form = InventoryForm(data = request.POST, instance=stuff) 
        if form.is_valid():
            # if Inventory.filter(item='item').exists()
            # obj = form.save(commit=False)
            form.save()

    else:
        stuff = Inventory.objects.get(id=id)
        form = InventoryForm(instance=stuff)
    context = RequestContext(request)
    return render_to_response('inventory.html', {
            'form':form, 'stuff':stuff
            }, RequestContext(request))

当我尝试以下网址格式时：

 url(r'^inventory/(?P<id>\d+)/$', inventory, kwargs=dict(model=models.Inventory) name ='inventory'),

我得到了404。

此网址格式：

url(r'^inventory/$', inventory, name='inventory'),

给我以下错误：

inventory（）只需要2个参数（给定1个）

这里的语法是什么？

编辑添加此网址正常工作，直到我添加了允许用户编辑的代码以及添加内容。

我在尝试以下建议时遇到的新错误的ETA追溯：

Environment:


Request Method: GET
Request URL: http://localhost:8000/inventory/16/

Django Version: 1.8
Python Version: 2.7.6
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django_tables2',
 'camp')
Installed Middleware:
('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',
 'django.middleware.security.SecurityMiddleware')


Template error:
In template /Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/bioluminati/camp/templates/base.html, error at line 58
   Reverse for 'inventory' with arguments '()' and keyword arguments '{}' not found. 1 pattern(s) tried: ['inventory/(?P<id>\\d+)/$']

   48 :                 </ul>



   49 :               </li>



   50 :               <li><a href="#">Setup and Exedus</a>



   51 :                 <ul>



   52 :                   <li><a href="#">Sign up for shifts</a></li>



   53 :                   <li><a href="#">Instructions and plans for setup</a></li>



   54 :                 </ul>   



   55 :               </li>



   56 :               <li><a href="#">Operations</a>



   57 :                 <ul>



   58 :                   <li><a href= {% url 'inventory' %} >Truck Inventory</a></li>



   59 :                   <li><a href="#">Budget </a></li>



   60 :                 </ul>



   61 :               </li>



   62 :                



   63 :               {%else %}



   64 :               <li><a href="login">Login</a></li>



   65 :               <li><a href="#">Contact</a></li>



   66 :               <li><a href="#">Join us</a></li>



   67 :               {% endif %}



   68 :               <li><a href="#">Resources</a>


Traceback:
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  132.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/bioluminati/camp/views.py" in inventory
  182.     return render(request, 'inventory.html', {'form': form, 'stuff': stuff})
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/shortcuts.py" in render
  67.             template_name, context, request=request, using=using)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/loader.py" in render_to_string
  99.         return template.render(context, request)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/backends/django.py" in render
  74.         return self.template.render(context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/base.py" in render
  209.                     return self._render(context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/base.py" in _render
  201.         return self.nodelist.render(context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/base.py" in render
  903.                 bit = self.render_node(node, context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/debug.py" in render_node
  79.             return node.render(context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/loader_tags.py" in render
  135.         return compiled_parent._render(context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/base.py" in _render
  201.         return self.nodelist.render(context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/base.py" in render
  903.                 bit = self.render_node(node, context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/debug.py" in render_node
  79.             return node.render(context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/defaulttags.py" in render
  329.                 return nodelist.render(context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/base.py" in render
  903.                 bit = self.render_node(node, context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/debug.py" in render_node
  79.             return node.render(context)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/defaulttags.py" in render
  507.                         six.reraise(*exc_info)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/template/defaulttags.py" in render
  493.             url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/core/urlresolvers.py" in reverse
  579.     return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs)))
File "/Users/rebeccaeliserobbins/Documents/repos/djangoBurnApp/env/lib/python2.7/site-packages/django/core/urlresolvers.py" in _reverse_with_prefix
  496.                              (lookup_view_s, args, kwargs, len(patterns), patterns))

Exception Type: NoReverseMatch at /inventory/16/
Exception Value: Reverse for 'inventory' with arguments '()' and keyword arguments '{}' not found. 1 pattern(s) tried: ['inventory/(?P<id>\\d+)/$'

Answer 1

此模式：url(r'^inventory/(?P<id>\d+)/$', inventory, kwargs=dict(model=models.Inventory) name ='inventory'),显示404，因为您需要使用存在的对象ID转到该网址 - 例如<site>.com/inventory/1

您尝试的第二种方式不起作用，因为url(r'^inventory/$', inventory, name='inventory'),无法捕获id参数（通过(?P<id>\d+)），但在您的视图中可以使用def inventory(request, id): ）。

所以这是适当的返工，我也为你清理了一些代码：

views.py

from django.shortcuts import render

def inventory(request, id):
    if request.method == "GET":
        stuff = Inventory.objects.get(id=id)
        form = InventoryForm(instance=stuff)

    if request.method == "POST":
        stuff = Inventory.objects.get(id=id)
        form = InventoryForm(data=request.POST, instance=stuff) 
        if form.is_valid():
            form.save()

    return render(request, 'inventory.html', {'form': form, 'stuff': stuff})

urls.py

url(r'^inventory/(?P<id>\d+)/$', inventory, name='inventory'),

view function（）只需2个参数（给定1个）

1 个答案: