The code does not work only on the server, what could be the reason?

Question

Django

There is a django site with pretty simple routing, this is what the root urls.py looks like :

from django.contrib import admin
from django.urls import path, include
from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
    path('', include('pages.urls')),
    path('services/', include('services.urls')),
    path('bookings/', include('bookings.urls')),
    path('admin/', admin.site.urls),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

This is how urls.py for services looks like :

from django.urls import path

from . import views

urlpatterns = [
  path('', views.index, name='services'),
  path('<int:service_id>', views.service, name='service'),
]

And views.py for services :

from django.shortcuts import render, get_object_or_404

from .models import Service


def index(request):
    services = Service.objects.all()

    context = {
        'services': services
    }

    return render(request, 'services.html', context)


def service(request, service_id):
    services = Service.objects.all()
    service = get_object_or_404(Service, pk=service_id)

    context = {
        'services': services,
        'service': service
    }

    return render(request, 'service.html', context)

This is how the link to the services page in the template looks like:

<a href="{% url 'services' %}" class="nav-link">Услуги</a>

On localhost, everything works correctly, on the server, the page with services gives a 500 error. Moreover, only this one - path('', views.index, name='services') , the page with one service path('', views.service, name='service') works correctly.
The django version is 2.2.1 both on the local and on the server, on the ubuntu server 18.04. What could be the problem?

Answer 1

One of the images used on this page was not uploaded correctly to the server.