dont fail on broken images

oxdata/poster/models.py

@@ -68,6 +68,9 @@ class PosterCache(models.Model):
     status = models.CharField(max_length=1024, default='200')
     failed = models.BooleanField(default=False)
 
+    def __unicode__(self):
+        return u'%s' % self.url
+
     def get(self):
         if not self.image and not self.failed:
             import ox.net
@@ -91,12 +94,11 @@ class PosterCache(models.Model):
         if self.image:
             try:
                 self.image.width
-            except IOError:
-                self.image.delete()
-            except TypeError:
+            except:
                 self.failed = True
                 self.status = "invalid image"
                 self.image.delete()
+                self.save()
         return self.image
 
 class Poster(models.Model):