Django | joined path is located outside of the base path component {% static img.thumbnail.url %}, Error 400 with whitenoise

Question

I've finish my first app in Django and works perfectly, but still have pre-deployment problems since I set DEGUG=False ... Here is just to display an image in a template... T_T

I was using this, but now it does'nt work when I use whitenoise to serve my image localy... And it return a Bad Request(400) error...

Models.py

class GalleryItem(models.Model):
    thumbnail = models.ImageField(blank=True,upload_to='gallery/thumb')
    img_wide = models.ImageField(blank=True,upload_to='gallery')

template.py

{% load staticfiles %}
{% for img in img_to_display %}
    <a href="{{ img.img_wide.url}}" class="swipebox" title="">
        <img src="{% static img.thumbnail.url %}" alt="{{ img.alt}}">
    </a>
{% endfor %}

urls.py

from django.conf.urls import url, include
from django.contrib import admin
from django.conf import settings
import os

from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
    url(r'^gallery/', include('gallery.urls')),
    url(r'^shop/', include('shop.urls')),
    url(r'^events/', include('events.urls')),
    url(r'^page/', include('paginator.urls')),
    url(r'^news/', include('blog.urls')),
    url(r'^ckeditor/', include('ckeditor_uploader.urls')),
    url(r'^admin/', admin.site.urls),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

settings.py

import os
import dj_database_url

BASE_DIR = os.path.dirname(os.path.dirname(__file__))
print("BASE_DIR = ",BASE_DIR)
MEDIA_ROOT = os.path.join(BASE_DIR, 'wt/static/media/')
MEDIA_URL = '/media/'

SECRET_KEY = 'SECRET_KEY'

DEBUG = False

INSTALLED_APPS = [
    'ckeditor',
    'ckeditor_uploader',
    'team.apps.TeamConfig',
    'gallery.apps.GalleryConfig',
    'shop.apps.ShopConfig',
    'events.apps.EventsConfig',
    'blog.apps.BlogConfig',
    'paginator.apps.paginatorConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

MIDDLEWARE_CLASSES = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'whitenoise.middleware.WhiteNoiseMiddleware',
]

ROOT_URLCONF = 'wt.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                "django.contrib.auth.context_processors.auth",
                "django.core.context_processors.request",
                "django.core.context_processors.debug",
                "django.core.context_processors.i18n",
                "django.core.context_processors.media",
                "django.core.context_processors.static",
                "django.core.context_processors.tz",
                "django.contrib.messages.context_processors.messages",
            ],
        },
    },
]

WSGI_APPLICATION = 'wt.wsgi.application'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'wt_db',
        'USER': 'postgres',
        'PASSWORD': 'PASSWORD',
        'HOST': '127.0.0.1',
        'PORT': '5432',
    }
}


AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]

LANGUAGE_CODE = 'fr-fr'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True

db_from_env = dj_database_url.config(conn_max_age=500)
DATABASES['default'].update(db_from_env)


ALLOWED_HOSTS = ['localhost', '127.0.0.1',]

STATIC_ROOT = os.path.join(BASE_DIR, 'wt/staticfiles')
STATIC_URL = '/static/'

STATICFILES_DIRS = [
    os.path.join(BASE_DIR, 'wt/static'),
    os.path.join(BASE_DIR, 'wt/staticfiles'),
]

STATICFILES_STORAGE = 'whitenoise.django.GzipManifestStaticFilesStorage'

CKEDITOR_UPLOAD_PATH = 'uploads'
CKEDITOR_IMAGE_BACKEND = 'pillow'
CKEDITOR_BROWSE_SHOW_DIRS = True

Here my error log :

The joined path (E:\media\gallery\thumb\lost-thumb.jpg) is located outside of the base path component (E:\dev\wt\wt\wt\staticfiles)
[15/May/2016 20:01:41] "GET /page/gallery HTTP/1.1" 400 26

Thanks a lot for helping ! :)

EDIT :

principal structure

project folder

Answer 1

I guess it was a security issue. Even if "whitenoise" is good to serve true static files in production, it can't serve media files.

I was making a structure error :

# Don't place your 'media' files IN your 'static' file like this :

MEDIA_ROOT = os.path.join(BASE_DIR, 'wt/static/media/')

MEDIA_ROOT never have to be in the "static" file of your project (even if you can make it works in some ways, it's not a good practice I think).

'MEDIA' files (in production), have to serve out of the Django project. I've read somewhere that we have to use a CDN. And firstly I choose CloudFlare (because it's free), but it wasn't working, cause you need a subdomain/hostname to point your MEDIA_ROOT, and Cloudflare doesn't give that. Finally, I choose Amazon S3.

So, in conclusion, write something like {% static img.thumbnail.url %} makes no sense. Because everything uploaded via admin/user haven't to be in "static".

Use {{ img.thumbnail.url }} instead.