Django 在定义视图时给出 "Reverse for 'view' not found" 错误

Question

在使用 django 4.0.4 时，我遇到错误“找不到 'upload' 的反向。'upload' 不是有效的视图函数或模式名称”。它在当天早些时候工作，我无法解决我一生的问题。我将包括我的 views.py、urls.py 和我的 html 文件的相关部分，所有这三个都位于项目的同一文件夹中。如果有人有任何建议，我将不胜感激。

Views.py

def welcome(request):
    return render(request, 'welcome.html')

def contact(request):
    return render(request, 'contact-us.html')

def how(request):
    return render(request, 'How-to-use.html')

def upload(request):
    if request.method == 'POST':
        if 'scatter_plot' in request.POST:
            form = UploadFileForm(request.POST.get, request.FILES)
            file=request.FILES['document']
            csv = CSV.objects.create(doc=file)
            os.system('python ../scatter_plot.py')
        if 'line_plot' in request.POST:
            form = UploadFileForm(request.POST.get, request.FILES)
            file=request.FILES['document']
            csv = CSV.objects.create(doc=file)
            os.system('python ../line_plot.py')
        return render(request, 'uploaded.html')
    else: 
        form = UploadFileForm

Urls.py

urlpatterns = [
    path('', views.welcome),
    path('admin/', admin.site.urls),
    path('contact-us/', views.contact),
    path('upload.html', views.upload),
    path('upload/', views.upload),
    path('welcome/', views.welcome),
    path('How-to-use/', views.how),
    path('contact-us.html', views.contact),
    path('welcome.html', views.welcome),
    path('How-to-use.html', views.how)
]

Welcome.html

<form method="POST" enctype="multipart/form-data" action="{% url 'upload' %}">
    {% csrf_token %}  
    <input type='file' name='document' accept='.csv'>
    <button type='submit' name='line_plot'>Graph as a line Graph</button>
    <button type='submit' name='scatter_plot'>Graph as a Scatter Plot</button>
</form>

Answer 1

您需要输入 URL

的名称

path('upload/', views.upload, name='upload'),

参考这个

https://docs.djangoproject.com/en/4.0/topics/http/urls/#reversing-namespaced-urls https://docs.djangoproject.com/en/4.0/topics/http/urls/

Django 在定义视图时给出 "Reverse for 'view' not found" 错误

Django giving "Reverse for 'view' not found" error when view is defined

html

python

django

django-urls

django-views