Add tracking for google_id_not_found to add_missing_isbn_to_editions

Add a django-admin command to run add_missing_isbn_to_editions

core/bookloader.py

@@ -570,18 +570,20 @@ def load_gutenberg_edition(title, gutenberg_etext_id, ol_work_id, seed_isbn, url
 
 def add_missing_isbn_to_editions(max_num=None, confirm=False):
     """For each of the editions with Google Books ids, do a lookup and attach ISBNs.  Set confirm to True to check db changes made correctly"""
-    print "Number of editions with Google Books IDs but not ISBNs", \
-        models.Edition.objects.filter(identifiers__type='goog').exclude(identifiers__type='isbn').count()
+    logger.info("Number of editions with Google Books IDs but not ISBNs (before): %d", 
+        models.Edition.objects.filter(identifiers__type='goog').exclude(identifiers__type='isbn').count())
     
     from regluit.experimental import bookdata
     
     gb = bookdata.GoogleBooks(key=settings.GOOGLE_BOOKS_API_KEY)
     
     new_isbns = []
+    google_id_not_found = []
     no_isbn_found = []
     editions_to_merge = []
     exceptions = []
     
+    
     for (i, ed) in enumerate(islice(models.Edition.objects.filter(identifiers__type='goog').exclude(identifiers__type='isbn'), max_num)):
         try:
             g_id = ed.identifiers.get(type='goog').value
@@ -593,7 +595,12 @@ def add_missing_isbn_to_editions(max_num=None, confirm=False):
         
         # try to get ISBN from Google Books
         try:
-            isbn = gb.volumeid(g_id)['isbn']
+            vol_id = gb.volumeid(g_id)
+            if vol_id is None:
+                google_id_not_found.append((ed.id, g_id))
+                logger.debug("g_id not found: %s", g_id)
+            else:
+                isbn = vol_id.get('isbn')
                 logger.info("g_id, isbn: %s %s", g_id, isbn)
                 if isbn is not None:
                     # check to see whether the isbn is actually already in the db but attached to another Edition
@@ -612,8 +619,8 @@ def add_missing_isbn_to_editions(max_num=None, confirm=False):
             logger.exception("add_missing_isbn_to_editions for edition.id %s: %s", ed.id, e)
             exceptions.append((ed.id, g_id, None, e))
             
-    print "Number of editions with Google Books IDs but not ISBNs", \
-        models.Edition.objects.filter(identifiers__type='goog').exclude(identifiers__type='isbn').count()        
+    logger.info("Number of editions with Google Books IDs but not ISBNs (after): %d", 
+        models.Edition.objects.filter(identifiers__type='goog').exclude(identifiers__type='isbn').count())     
     
     ok = None