From 8cb502d5b98f4445e06bcb22a39eafde4baf8cf7 Mon Sep 17 00:00:00 2001
From: eric <eric@hellman.net>
Date: Fri, 10 Jun 2016 16:30:03 -0400
Subject: [PATCH] squash the missing edition problem

---
 core/models.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/core/models.py b/core/models.py
index 5fb936df..53f77178 100755
--- a/core/models.py
+++ b/core/models.py
@@ -1123,8 +1123,12 @@ class Work(models.Model):
 
     @property
     def googlebooks_id(self):
-        preferred_id=self.preferred_edition.googlebooks_id
-        # note that there's always a preferred edition
+        try:
+            preferred_id=self.preferred_edition.googlebooks_id
+            # note that there should always be a preferred edition
+        except AttributeError:
+            # this work has no edition.
+            return ''
         if preferred_id:
             return preferred_id
         try:
@@ -1307,6 +1311,7 @@ class Work(models.Model):
                 return WasWork.objects.get(was=self.id).work.preferred_edition
             except WasWork.DoesNotExist:
                 #should not happen
+                logger.warning('work {} has no edition'.format(self.id))
                 return None
         
     def last_campaign_status(self):