simple implementation of Django STORAGES

categories/models.py

@@ -4,7 +4,6 @@
 from django.contrib.contenttypes.fields import GenericForeignKey
 from django.contrib.contenttypes.models import ContentType
 from django.core.files.images import get_image_dimensions
-from django.core.files.storage import get_storage_class
 from django.db import models
 from django.urls import reverse
 from django.utils.encoding import force_str
@@ -15,10 +14,19 @@
     RELATION_MODELS,
     RELATIONS,
     THUMBNAIL_STORAGE,
+    THUMBNAIL_STORAGE_ALIAS,
     THUMBNAIL_UPLOAD_PATH,
 )
 
-STORAGE = get_storage_class(THUMBNAIL_STORAGE)
+# Determine storage method based on Django version
+try:  # Django 4.2+
+    from django.core.files.storage import storages
+
+    STORAGE = storages[THUMBNAIL_STORAGE_ALIAS]
+except ImportError:
+    from django.core.files.storage import get_storage_class
+
+    STORAGE = get_storage_class(THUMBNAIL_STORAGE)()
 
 
 class Category(CategoryBase):
@@ -28,7 +36,7 @@
         upload_to=THUMBNAIL_UPLOAD_PATH,
         null=True,
         blank=True,
-        storage=STORAGE(),
+        storage=STORAGE,
     )
     thumbnail_width = models.IntegerField(blank=True, null=True)
     thumbnail_height = models.IntegerField(blank=True, null=True)

categories/settings.py

@@ -11,6 +11,7 @@
     "FK_REGISTRY": {},
     "THUMBNAIL_UPLOAD_PATH": "uploads/categories/thumbnails",
     "THUMBNAIL_STORAGE": settings.DEFAULT_FILE_STORAGE,
+    "THUMBNAIL_STORAGE_ALIAS": "default",
     "JAVASCRIPT_URL": getattr(settings, "STATIC_URL", settings.MEDIA_URL) + "js/",
     "SLUG_TRANSLITERATOR": "",
     "REGISTER_ADMIN": True,

categories/tests/test_models.py

@@ -1,19 +1,26 @@
 import os
 
+import django
 from django.core.files import File
 from django.core.files.uploadedfile import UploadedFile
 from django.test import TestCase
 
 from categories.models import Category
+from example.test_storages import MyTestStorage, MyTestStorageAlias
 
 
 class TestCategoryThumbnail(TestCase):
     def test_thumbnail(self):
         file_name = "test_image.jpg"
-
         with open(os.path.join(os.path.dirname(__file__), file_name), "rb") as f:
             test_image = UploadedFile(File(f), content_type="image/jpeg")
             category = Category.objects.create(name="Test Category", slug="test-category", thumbnail=test_image)
+
             self.assertEqual(category.pk, 1)
             self.assertEqual(category.thumbnail_width, 640)
             self.assertEqual(category.thumbnail_height, 480)
+
+            if django.VERSION >= (4, 2):
+                self.assertEqual(category.thumbnail.storage.__class__, MyTestStorageAlias)
+            else:
+                self.assertEqual(category.thumbnail.storage.__class__, MyTestStorage)

doc_src/reference/settings.rst

@@ -22,6 +22,7 @@ The default settings are:
 	    'FK_REGISTRY': {},
 	    'THUMBNAIL_UPLOAD_PATH': 'uploads/categories/thumbnails',
 	    'THUMBNAIL_STORAGE': settings.DEFAULT_FILE_STORAGE,
+	    'THUMBNAIL_STORAGE_ALIAS': 'default',
 	    'SLUG_TRANSLITERATOR': lambda x: x,
 	    'ADMIN_FIELDSETS': {}
 	}
@@ -112,6 +113,15 @@ THUMBNAIL_STORAGE
 
 **Description:** How to store the thumbnails. Allows for external storage engines like S3.
 
+.. _THUMBNAIL_STORAGE:
+
+THUMBNAIL_STORAGE_ALIAS
+=======================
+
+**Default:** ``default``
+
+**Description:** If new STORAGES settings from Django 4.2+ is used, use storage with this alias.
+
 .. _JAVASCRIPT_URL:
 
 JAVASCRIPT_URL

example/settings-testing.py

@@ -98,6 +98,20 @@
     },
 ]
 
+
+STORAGES = {
+    "default": {
+        "BACKEND": "django.core.files.storage.FileSystemStorage",
+    },
+    "staticfiles": {
+        "BACKEND": "django.core.files.storage.FileSystemStorage",
+    },
+    "thumbnails": {
+        "BACKEND": "example.test_storages.MyTestStorageAlias",
+    },
+}
+
+
 CATEGORIES_SETTINGS = {
     "ALLOW_SLUG_CHANGE": True,
     "RELATION_MODELS": ["simpletext.simpletext", "flatpages.flatpage"],
@@ -115,6 +129,8 @@
             {"name": "more_categories", "related_name": "more_cats"},
         ),
     },
+    "THUMBNAIL_STORAGE": "example.test_storages.MyTestStorage",
+    "THUMBNAIL_STORAGE_ALIAS": "thumbnails",
 }
 
 TEST_RUNNER = "django.test.runner.DiscoverRunner"

example/settings.py

@@ -99,6 +99,7 @@
     }
 ]
 
+
 CATEGORIES_SETTINGS = {
     "ALLOW_SLUG_CHANGE": True,
     "RELATION_MODELS": ["simpletext.simpletext", "flatpages.flatpage"],

example/test_storages.py

@@ -0,0 +1,10 @@
+# Storages used for testing THUMBNAIL_STORAGE and THUMBNAIL_STORAGE_ALIAS
+from django.core.files.storage import FileSystemStorage
+
+
+class MyTestStorage(FileSystemStorage):
+    pass
+
+
+class MyTestStorageAlias(FileSystemStorage):
+    pass