我正在尝试上传文件，我从某个网站获得了代码。这是用较旧的Django版本编写的，而我使用的是最新版本。在运行时遇到一些错误，请通过stackoverflow进行修复。但是现在我对提到的错误一无所知，这是我的第一个Django项目。提前致谢。 以下是我的文件
views.py
from django.shortcuts import render
from django.http import HttpResponseRedirect
from .models import Document
from .forms import DocumentForm
from django.urls import reverse
#
def list1(request):
# Handle file upload
if request.method == 'POST':
form = DocumentForm(request.POST, request.FILES)
if form.is_valid():
newdoc = Document(docfile = request.FILES['docfile'])
newdoc.save()
# Redirect to the document list after POST
return HttpResponseRedirect(reverse('myproject.myapp.views.list'))
else:
form = DocumentForm() # A empty, unbound form
# Load documents for the list page
documents = Document.objects.all()
# Render list page with the documents and the form
return render(request,
'csv_manipulation/list.html',
)
def index(request):
return render('myapp/index.html')
urls.py
from django.urls import path, include
from .views import list1
urlpatterns = [
path(r'', list1),
path(r'list/', list1),
]
forms.py
from django import forms
class DocumentForm(forms.Form):
docfile = forms.FileField(
label='Select a file',
)
list.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Minimal Django File Upload Example</title>
</head>
<body>
<!-- List of uploaded documents -->
{% if documents %}
<ul>
{% for document in documents %}
<li><a href="{{ document.docfile.url }}">{{ document.docfile.name }}
<img src="{{ document.docfile.url }}" alt="{{ document.docfile.name }}">
</a></li>
{% endfor %}
</ul>
{% else %}
<p>No documents.</p>
{% endif %}
<!-- Upload form. Note enctype attribute! -->
<form action="{% url 'list1' %}" method="post" enctype="multipart/form-data">
{% csrf_token %}
<p>{{ form.non_field_errors }}</p>
<p>{{ form.docfile.label_tag }} </p>
<p>
{{ form.docfile.errors }}
{{ form.docfile }}
</p>
<p><input type="submit" value="Upload" /></p>
</form>
</body>
</html>
错误
Template error:
In template C:\Users\nmasthex\projects\adept_proj\adept_stage1\csv_manipulation\templates\csv_manipulation\list.html, error at line 23
Reverse for 'list1' not found. 'list1' is not a valid view function or pattern name.
13 : <li><a href="{{ document.docfile.url }}">{{ document.docfile.name }}
14 : <img src="{{ document.docfile.url }}" alt="{{ document.docfile.name }}">
15 : </a></li>
16 : {% endfor %}
17 : </ul>
18 : {% else %}
19 : <p>No documents.</p>
20 : {% endif %}
21 :
22 : <!-- Upload form. Note enctype attribute! -->
23 : <form action=" {% url 'list1' %} " method="post" enctype="multipart/form-data">
24 : {% csrf_token %}
25 : <p>{{ form.non_field_errors }}</p>
26 : <p>{{ form.docfile.label_tag }} </p>
27 : <p>
28 : {{ form.docfile.errors }}
29 : {{ form.docfile }}
30 : </p>
31 : <p><input type="submit" value="Upload" /></p>
32 : </form>
33 :
Traceback:
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\core\handlers\exception.py" in inner
34. response = get_response(request)
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\core\handlers\base.py" in _get_response
126. response = self.process_exception_by_middleware(e, request)
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\core\handlers\base.py" in _get_response
124. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\nmasthex\projects\adept_proj\adept_stage1\csv_manipulation\views.py" in list1
29. 'csv_manipulation/list.html',
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\shortcuts.py" in render
36. content = loader.render_to_string(template_name, context, request, using=using)
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\template\loader.py" in render_to_string
62. return template.render(context, request)
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\template\backends\django.py" in render
61. return self.template.render(context)
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\template\base.py" in render
171. return self._render(context)
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\template\base.py" in _render
163. return self.nodelist.render(context)
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\template\base.py" in render
937. bit = node.render_annotated(context)
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\template\base.py" in render_annotated
904. return self.render(context)
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\template\defaulttags.py" in render
442. url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\urls\base.py" in reverse
90. return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
File "C:\Users\nmasthex\Envs\myproject\lib\site-packages\django\urls\resolvers.py" in _reverse_with_prefix
622. raise NoReverseMatch(msg)
Exception Type: NoReverseMatch at /csv_manipulation/
Exception Value: Reverse for 'list1' not found. 'list1' is not a valid view function or pattern name.
答案 0 :(得分：1)
您需要为此特定视图在URL中添加一个命名空间。
path(r'list/', list1, name=‘namespace’)
然后在模板中使用：
{% url ‘app_name:namespace’ %}
path()中的名称空间变量可以是您想要的任何内容：
path(r'list/', list1, name=‘foo’)
然后：
{% url ‘app_name:foo’ %}
答案 1 :(得分：0)
也许您应该尝试在网址路径中添加第三个参数。如果要使用
{% url 'list1' %}，您需要添加名称
path(r'list/', list1, name='list1'),