Converting file name to a preudo-unique number instead of the original name.

boards/models.py

@@ -1,4 +1,5 b''
 import os
+from random import random
 import re
 from django.db import models
 from django.utils import timezone
@@ -15,14 +16,6 b" NO_IP = '0.0.0.0'"
 UNKNOWN_UA = ''
 
 
-def update_image_filename(instance, filename):
-    """Get unique image filename"""
-
-    path = 'images/'
-    new_name = str(int(time.mktime(time.gmtime()))) + '_' + filename
-    return os.path.join(path, new_name)
-
-
 class PostManager(models.Manager):
     ALL_PAGES = -1
 
@@ -169,12 +162,26 b' class Tag(models.Model):'
 class Post(models.Model):
     """A post is a message."""
 
+    IMAGES_DIRECTORY = 'images/'
+    FILE_EXTENSION_DELIMITER = '.'
+
     objects = PostManager()
 
+    def _update_image_filename(self, filename):
+        """Get unique image filename"""
+
+        path = self.IMAGES_DIRECTORY
+        new_name = str(int(time.mktime(time.gmtime())))
+        new_name += str(int(random() * 1000))
+        new_name += self.FILE_EXTENSION_DELIMITER
+        new_name += filename.split(self.FILE_EXTENSION_DELIMITER)[-1:][0]
+
+        return os.path.join(path, new_name)
+
     title = models.CharField(max_length=50)
     pub_time = models.DateTimeField()
     text = MarkupField(default_markup_type='markdown', escape_html=True)
-    image = thumbs.ImageWithThumbsField(upload_to=update_image_filename,
+    image = thumbs.ImageWithThumbsField(upload_to=_update_image_filename,
                                         blank=True, sizes=((200, 150),))
     poster_ip = models.IPAddressField()
     poster_user_agent = models.TextField()