Better upload helper and admin integration

fmartingrcom/apps/blog/admin.py

@@ -87,6 +87,11 @@ admin.site.register(Tag, TagAdmin)
 #    ATTACHMENT
 #
 class AttachmentAdmin(VersionAdmin):
-    pass
+    list_display = ('filename', 'sha1', )
+    fields = ('file', )
+
+    def save_model(self, request, obj, form, change):
+        handler = form.cleaned_data.get('file')
+        Attachment.upload(handler, handler.name)
 
 admin.site.register(Attachment, AttachmentAdmin)

fmartingrcom/apps/blog/models.py

@@ -125,7 +125,7 @@ class Attachment(models.Model):
         return 'attachment/{}/{}/{}/'.format(p1, p2, self.sha1)
 
     @staticmethod
-    def upload_file(handler, filename=None):
+    def upload(handler, filename=None):
         """
         Given a certain file handler returns an `Image` objects
         handler can be:

fmartingrcom/utils.py

@@ -1,8 +1,17 @@
 # -*- coding: utf-8 -*-
 import hashlib
+import uuid
+
+from django.core.files.uploadedfile import InMemoryUploadedFile
 
 
 def sha1_checksum(handler):
-    f = open(handler.file.name, 'rb')
+    if isinstance(handler, InMemoryUploadedFile):
+        temp_name = '/tmp/_{}'.format(uuid.uuid4())
+        f = open(temp_name, 'wb+')
+        f.write(handler.read())
+    else:
+        f = open(handler.name, 'rb')
+
     checksum = hashlib.sha1(f.read())
     return checksum.hexdigest()