load sequences with raw sql

pandora/sequence/tasks.py

@@ -21,16 +21,32 @@ def get_sequences(itemId):
     position = 0
     for stream in i.streams():
         data, position = extract.get_sequences(stream.timeline_prefix, position)
-        with transaction.commit_on_success():
-            for mode in data:
-                for seq in data[mode]:
-                    s = models.Sequence()
-                    s.item = i
-                    s.mode = mode
-                    s.start = float('%0.03f' % seq['in'])
-                    s.end = float('%0.03f' % seq['out'])
-                    s.hash = seq['hash']
-                    s.save()
+        keys = None
+        values = []
+        for mode in data:
+            for s in data[mode]:
+                sequence = {
+                    'item_id': i.pk,
+                    'sort_id': i.sort.pk,
+                    'mode': mode,
+                    'start': float('%0.03f' % s['in']),
+                    'end': float('%0.03f' % s['out']),
+                    'hash': s['hash']
+                }
+                sequence['public_id'] = u"%s/%0.03f-%0.03f" % (
+                    i.itemId, sequence['start'], sequence['end']
+                )
+                sequence['duration'] = sequence['end'] - sequence['start']
+                if not keys:
+                    keys = ', '.join(['"%s"'%k for k in sequence.keys()])
+                v = ', '.join([isinstance(v, basestring) and "'%s'"%v or str(v)
+                               for v in sequence.values()])
+                values.append('(%s)'%v)
+
+        cursor = connection.cursor()
+        sql = "INSERT INTO sequence_sequence (%s) VALUES %s" % (keys, ', '.join(values));
+        cursor.execute(sql)
+        transaction.commit_unless_managed()
 
 @task(ignore_results=True, queue='encoding')
 def update_sequence_ids(itemId):