Remove file after the attachment was removed

boards/signals.py

@@ -1,4 +1,11 b''
 import re
+import os
+
+from django.db.models.signals import post_save, pre_save, pre_delete, \
+    post_delete
+from django.dispatch import receiver
+from django.utils import timezone
+
 from boards import thumbs
 from boards.mdx_neboard import get_parser
 
@@ -8,10 +15,7 b' from boards.models.post import REGEX_NOT'
         REGEX_GLOBAL_REPLY
 from boards.models.post.manager import post_import_deps
 from boards.models.user import Notification
-from django.db.models.signals import post_save, pre_save, pre_delete, \
-    post_delete
-from django.dispatch import receiver
-from django.utils import timezone
+from neboard.settings import MEDIA_ROOT
 
 
 THUMB_SIZES = ((200, 150),)
@@ -113,3 +117,16 b' def rebuild_refmap(instance, **kwargs):'
     for referenced_post in instance.refposts.all():
         referenced_post.build_refmap(excluded_ids=[instance.id])
         referenced_post.save(update_fields=['refmap'])
+
+
+@receiver(post_delete, sender=Attachment)
+def delete_file(instance, **kwargs):
+    if instance.is_internal():
+        file = MEDIA_ROOT + instance.file.name
+        os.remove(file)
+        if instance.mimetype in FILE_TYPES_IMAGE:
+            for size in THUMB_SIZES:
+                file_name_parts = instance.file.name.split('.')
+                thumb_file = MEDIA_ROOT + '{}.{}x{}.{}'.format(file_name_parts[0], *size, file_name_parts[1])
+                os.remove(thumb_file)
+