Prevent useless portal_catalog calls.

Fetching 1 element is faster than counting all.

master/bt5/slapos_accounting/SkinTemplateItem/portal_skins/slapos_accounting/Person_getOpenSaleOrderDifference.xml

@@ -73,11 +73,14 @@ now = DateTime()\n
 add_kw_kw = {}\n
 for add_kw in add_kw_list:\n
   hosting_url = add_kw[\'aggregate\']\n
-  existing = portal.portal_catalog.countResults(\n
+  if hosting_url not in hosting_subscription_mapping:\n
+    existing = len(portal.portal_catalog(\n
       portal_type=\'Open Sale Order Line\',\n
-    default_aggregate_uid=portal.restrictedTraverse(hosting_url).getUid()\n
-    )[0][0] > 0\n
-  if hosting_url not in hosting_subscription_mapping and not existing:\n
+      default_aggregate_uid=portal.restrictedTraverse(hosting_url).getUid(),\n
+      limit=1,\n
+      )) > 0\n
+    if not existing:\n
+      # Hosting Subscription has never been related to any open order\n
       add_kw_kw[hosting_url] = add_kw.copy()\n
       add_kw_kw[hosting_url][\'explanation\'] = [\'Added because of %s \' % hosting_url]\n
 \n

master/bt5/slapos_accounting/bt/revision

-226
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+227
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