[model]: More careful about creating tables, since paster db upgrade loads the envrionment and therefore runs setup() before it does the migrations, and therefore in this instance we do not want to create the db tables.

ckanext/harvest/model/__init__.py

@@ -1,6 +1,7 @@
 import logging
 import datetime
 
+from ckan import model
 from ckan.model.meta import *
 from ckan.model.types import make_uuid
 from ckan.model.core import *
@@ -28,7 +29,12 @@ harvest_object_error_table = None
 def setup():
     if harvest_source_table is None:
         create_harvester_tables()
-    metadata.create_all()
+        log.debug('Harvest tables defined in memory')
+    if model.repo.are_tables_created():
+        metadata.create_all()
+        log.debug('Harvest tables created')
+    else:
+        log.debug('Harvest table creation deferred')
     
 
 class HarvestError(Exception):