Websites generally need to serve additional files such as images, JavaScript,
or CSS. In Django, we refer to these files as “static files”. Django provides
django.contrib.staticfiles to help you manage them.
This page describes how you can serve these static files.
Make sure that django.contrib.staticfiles is included in your
INSTALLED_APPS.
In your settings file, define STATIC_URL, for example:
STATIC_URL = '/static/'
In your templates, either hardcode the url like
/static/my_app/example.jpg or, preferably, use the static
template tag to build the URL for the given relative path by using the
configured STATICFILES_STORAGE storage (this makes it much easier
when you want to switch to a content delivery network (CDN) for serving
static files).
{% load static %}
<img src="{% static "my_app/example.jpg" %}" alt="My image"/>
Store your static files in a folder called static in your app. For
example my_app/static/my_app/example.jpg.
Serving the files
In addition to these configuration steps, you’ll also need to actually serve the static files.
During development, if you use django.contrib.staticfiles, this will
be done automatically by runserver when DEBUG is set
to True (see django.contrib.staticfiles.views.serve()).
This method is grossly inefficient and probably insecure, so it is unsuitable for production.
See Deploying static files for proper strategies to serve static files in production environments.
Your project will probably also have static assets that aren’t tied to a
particular app. In addition to using a static/ directory inside your apps,
you can define a list of directories (STATICFILES_DIRS) in your
settings file where Django will also look for static files. For example:
STATICFILES_DIRS = [
os.path.join(BASE_DIR, "static"),
'/var/www/static/',
]
See the documentation for the STATICFILES_FINDERS setting for
details on how staticfiles finds your files.
Static file namespacing
Now we might be able to get away with putting our static files directly
in my_app/static/ (rather than creating another my_app
subdirectory), but it would actually be a bad idea. Django will use the
first static file it finds whose name matches, and if you had a static file
with the same name in a different application, Django would be unable to
distinguish between them. We need to be able to point Django at the right
one, and the easiest way to ensure this is by namespacing them. That is,
by putting those static files inside another directory named for the
application itself.
If you use django.contrib.staticfiles as explained above,
runserver will do this automatically when DEBUG is set
to True. If you don’t have django.contrib.staticfiles in
INSTALLED_APPS, you can still manually serve static files using the
django.views.static.serve() view.
This is not suitable for production use! For some common deployment strategies, see Deploying static files.
For example, if your STATIC_URL is defined as /static/, you can do
this by adding the following snippet to your urls.py:
from django.conf import settings
from django.conf.urls.static import static
urlpatterns = [
# ... the rest of your URLconf goes here ...
] + static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)
Note
This helper function works only in debug mode and only if
the given prefix is local (e.g. /static/) and not a URL (e.g.
http://static.example.com/).
Also this helper function only serves the actual STATIC_ROOT
folder; it doesn’t perform static files discovery like
django.contrib.staticfiles.
During development, you can serve user-uploaded media files from
MEDIA_ROOT using the django.views.static.serve() view.
This is not suitable for production use! For some common deployment strategies, see Deploying static files.
For example, if your MEDIA_URL is defined as /media/, you can do
this by adding the following snippet to your urls.py:
from django.conf import settings
from django.conf.urls.static import static
urlpatterns = [
# ... the rest of your URLconf goes here ...
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
Note
This helper function works only in debug mode and only if
the given prefix is local (e.g. /media/) and not a URL (e.g.
http://media.example.com/).
When running tests that use actual HTTP requests instead of the built-in
testing client (i.e. when using the built-in LiveServerTestCase) the static assets need to be served along
the rest of the content so the test environment reproduces the real one as
faithfully as possible, but LiveServerTestCase has only very basic static
file-serving functionality: It doesn’t know about the finders feature of the
staticfiles application and assumes the static content has already been
collected under STATIC_ROOT.
Because of this, staticfiles ships its own
django.contrib.staticfiles.testing.StaticLiveServerTestCase, a subclass
of the built-in one that has the ability to transparently serve all the assets
during execution of these tests in a way very similar to what we get at
development time with DEBUG = True, i.e. without having to collect them
using collectstatic first.
django.contrib.staticfiles provides a convenience management command
for gathering static files in a single directory so you can serve them easily.
Set the STATIC_ROOT setting to the directory from which you’d
like to serve these files, for example:
STATIC_ROOT = "/var/www/example.com/static/"
Run the collectstatic management command:
$ python manage.py collectstatic
This will copy all files from your static folders into the
STATIC_ROOT directory.
Use a web server of your choice to serve the files. Deploying static files covers some common deployment strategies for static files.
This document has covered the basics and some common usage patterns. For
complete details on all the settings, commands, template tags, and other pieces
included in django.contrib.staticfiles, see the staticfiles
reference.
Jun 22, 2017