mark new harvest objects as current

When a new harvest_object for a new package was being created, it
was immediately being marked as false, as all objects were marked
as false, including the new object just created and newly marked
as current=true.

Fix so that old HarvestObjects are only marked as current=False
when updating an existing package.

ckanext/harvest/harvesters/base.py

@@ -167,6 +167,20 @@ class HarvesterBase(SingletonPlugin):
                     log.info('Package with GUID %s not updated, skipping...' % harvest_object.guid)
                     return
 
+                # Flag the other objects linking to this package as not current anymore
+                from ckanext.harvest.model import harvest_object_table
+                conn = Session.connection()
+                u = update(harvest_object_table) \
+                        .where(harvest_object_table.c.package_id==bindparam('b_package_id')) \
+                        .values(current=False)
+                conn.execute(u, b_package_id=new_package['id'])
+
+                # Flag this as the current harvest object
+
+                harvest_object.package_id = new_package['id']
+                harvest_object.current = True
+                harvest_object.save()
+
             except NotFound:
                 # Package needs to be created
 
@@ -186,21 +200,8 @@ class HarvesterBase(SingletonPlugin):
 
                 new_package = get_action('package_create_rest')(context, package_dict)
 
-            # Flag the other objects linking to this package as not current anymore
-            from ckanext.harvest.model import harvest_object_table
-            conn = Session.connection()
-            u = update(harvest_object_table) \
-                    .where(harvest_object_table.c.package_id==bindparam('b_package_id')) \
-                    .values(current=False)
-            conn.execute(u, b_package_id=new_package['id'])
             Session.commit()
 
-            # Flag this as the current harvest object
-
-            harvest_object.package_id = new_package['id']
-            harvest_object.current = True
-            harvest_object.save()
-
             return True
 
         except ValidationError,e: