added atomic commiting to processing comic books to increase performance.

comic/models.py

@@ -1,4 +1,5 @@
 from django.db import models
+from django.db.transaction import atomic
 from django.utils.http import urlsafe_base64_encode, urlsafe_base64_decode
 from django.contrib.auth.models import User
 
@@ -18,6 +19,7 @@ class Setting(models.Model):
     def __unicode__(self):
         return self.__str__()
 
+
 class ComicBook(models.Model):
     file_name = models.CharField(max_length=100, unique=True)
 
@@ -129,7 +131,7 @@ class ComicBook(models.Model):
             cbx = zipfile.ZipFile(path.join(base_dir, comic_path))
         except zipfile.BadZipfile:
             return False
-
+        with atomic():
             book = ComicBook(file_name=comic_file_name)
             book.save()
             i = 0

comic/views.py

@@ -3,8 +3,6 @@ from django.template import RequestContext
 from django.utils.http import urlsafe_base64_decode
 from django.shortcuts import render, redirect, get_object_or_404
 from django.contrib.auth.decorators import login_required, user_passes_test
-from django.core.validators import validate_email
-from django.core.exceptions import ValidationError
 from django.contrib.auth.models import User
 
 from comic.models import Setting, ComicBook, ComicStatus