Django 2.0.7 URL app_name的工作方式

Question

I'm working on a project built with python 3.4.3 and django 2.0.7 and I'm stuck with URLs files logic. I still haven't figured this error out: "ImportError: No module named 'fields'.

Here's what I have:

urls.py

from django.urls import include, path
from django.contrib import admin
from bridge.core import views as core_views

urlpatterns = [
    path('', core_views.home),
    path('backoffice/fields/', include('fields.urls', namespace='backoffice')),
    path('admin/', admin.site.urls),
]

fields/urls.py

from django.urls import path
from . import views

app_name = 'fields'

urlpatterns = [
    path('', views.list_fields, name='list_fields'),
]

What does "app_name" is supposed to be filled with? How "app_name" works?

According to there files, when I submit "/backoffice/fields/" in the browser django should invoke "views.list_fields", shouldn't?

If any other information is required to help me with this issue, just let me know and I'll provide it as quickly as possible.

Thanks in advance

Answer 1

The app_name is used to reference your urls else where. You will also see referenced as namespacing . If you would have two different apps with the same url name , it wouldn't always pick the right one. So you namespace them and call them as such:

{% url 'employee:name' %}
{% url 'customer:name' %}

You can use the names in more than just template tags, like reverse('employee:name') and such.

The problem you are running into is that it doesn't know where to find your urls file. If your installed app is bridge.fields , try using include(bridge.fields.urls) .

To fully find your problem I would have to see you project folder structure as to where your main urls file is and where your fields.urls is. Remember that fields.urls really means a file named urls.py that is located in the folder named fields .