Populate launches based on the first daily exists

migrations/009_populate_past_launches.py

@@ -0,0 +1,49 @@
+import datetime
+import os
+import sys
+
+POSSIBLE_TOPDIR = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
+                                                os.pardir, os.pardir))
+if os.path.exists(os.path.join(POSSIBLE_TOPDIR, 'stacktach')):
+    sys.path.insert(0, POSSIBLE_TOPDIR)
+
+from django.db.models import Min
+
+from stacktach import models
+
+
+if __name__ != '__main__':
+    sys.exit(1)
+
+
+def add_past_exists(start, end):
+    exists = models.InstanceExists.objects.select_related()\
+                                  .filter(raw__when__gte=start,
+                                          raw__when__lte=end)
+    i = 0
+    for exist in exists:
+        i += 1
+        print i
+        if models.InstanceUsage.objects\
+                 .filter(instance=exist.instance).count() == 0:
+            # We got an exist record that we don't have any launches for
+            values = {'instance': exist.instance,
+                      'launched_at': exist.launched_at,
+                      'instance_type_id': exist.instance_type_id,
+                      'request_id': 'req-fake'}
+            print values
+            models.InstanceUsage(**values).save()
+
+
+def find_earliest_daily_audit_period_beginning():
+    where = 'audit_period_ending = audit_period_beginning + (60*60*24)'
+    query = models.InstanceExists.objects.extra(where=[where])\
+                                 .aggregate(Min('audit_period_beginning'))
+
+    return query['audit_period_beginning__min']
+
+
+start = find_earliest_daily_audit_period_beginning()
+end = start + (60 * 60 * 24)
+
+add_past_exists(start, end)