remove existing sequences on update, rebuilding is faster than migration. drop one index to make import faster

pandora/sequence/migrations/0002_optimize1.py

@@ -8,6 +8,8 @@ from django.db import models
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
+        orm['sequence.Sequence'].objects.all().delete()
+
         # Removing unique constraint on 'Sequence', fields ['item', 'end', 'mode', 'start']
         db.delete_unique('sequence_sequence', ['item_id', 'end', 'mode', 'start'])
 
@@ -29,20 +31,7 @@ class Migration(SchemaMigration):
 
         # Adding unique constraint on 'Sequence', fields ['sort', 'start', 'end', 'mode']
         db.create_unique('sequence_sequence', ['sort_id', 'start', 'end', 'mode'])
-        
+
-        def nslice(s, n):
-            while len(s) >= n:
-                yield s[:n]
-                s = s[n:]
-            if len(s):
-                yield s
-        
-        ids = [s['id'] for s in orm['sequence.Sequence'].objects.all().values('id')]
-        for i in nslice(ids, 10000):
-            for s in orm['sequence.Sequence'].objects.filter(id__in=i):
-                s.mode2 = s.mode == 'color' and 1 or 0
-                s.hash2 = int(s.hash, 16) - 9223372036854775808
-                s.save()
 
     def backwards(self, orm):
         # Removing unique constraint on 'Sequence', fields ['sort', 'start', 'end', 'mode']

pandora/sequence/migrations/0004_optimize3.py

@@ -0,0 +1,142 @@
+# -*- coding: utf-8 -*-
+import datetime
+from south.db import db
+from south.v2 import SchemaMigration
+from django.db import models
+
+
+class Migration(SchemaMigration):
+
+    def forwards(self, orm):
+        # Removing index on 'Sequence', fields ['start']
+        db.delete_index('sequence_sequence', ['start'])
+
+
+    def backwards(self, orm):
+        # Adding index on 'Sequence', fields ['start']
+        db.create_index('sequence_sequence', ['start'])
+
+
+    models = {
+        'auth.group': {
+            'Meta': {'object_name': 'Group'},
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '255'}),
+            'permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'})
+        },
+        'auth.permission': {
+            'Meta': {'ordering': "('content_type__app_label', 'content_type__model', 'codename')", 'unique_together': "(('content_type', 'codename'),)", 'object_name': 'Permission'},
+            'codename': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'content_type': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['contenttypes.ContentType']"}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '50'})
+        },
+        'auth.user': {
+            'Meta': {'object_name': 'User'},
+            'date_joined': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
+            'email': ('django.db.models.fields.EmailField', [], {'max_length': '255', 'blank': 'True'}),
+            'first_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
+            'groups': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Group']", 'symmetrical': 'False', 'blank': 'True'}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'is_active': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
+            'is_staff': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'is_superuser': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
+            'last_login': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
+            'last_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
+            'password': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
+            'user_permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'}),
+            'username': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '255'})
+        },
+        'contenttypes.contenttype': {
+            'Meta': {'ordering': "('name',)", 'unique_together': "(('app_label', 'model'),)", 'object_name': 'ContentType', 'db_table': "'django_content_type'"},
+            'app_label': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'model': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
+            'name': ('django.db.models.fields.CharField', [], {'max_length': '100'})
+        },
+        'item.item': {
+            'Meta': {'object_name': 'Item'},
+            'created': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
+            'data': ('ox.django.fields.DictField', [], {'default': '{}'}),
+            'external_data': ('ox.django.fields.DictField', [], {'default': '{}'}),
+            'groups': ('django.db.models.fields.related.ManyToManyField', [], {'symmetrical': 'False', 'related_name': "'items'", 'blank': 'True', 'to': "orm['auth.Group']"}),
+            'icon': ('django.db.models.fields.files.ImageField', [], {'default': 'None', 'max_length': '100', 'blank': 'True'}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'itemId': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '128', 'blank': 'True'}),
+            'json': ('ox.django.fields.DictField', [], {'default': '{}'}),
+            'level': ('django.db.models.fields.IntegerField', [], {'db_index': 'True'}),
+            'modified': ('django.db.models.fields.DateTimeField', [], {'auto_now': 'True', 'blank': 'True'}),
+            'notes': ('django.db.models.fields.TextField', [], {'default': "''"}),
+            'oxdbId': ('django.db.models.fields.CharField', [], {'max_length': '42', 'unique': 'True', 'null': 'True', 'blank': 'True'}),
+            'poster': ('django.db.models.fields.files.ImageField', [], {'default': 'None', 'max_length': '100', 'blank': 'True'}),
+            'poster_frame': ('django.db.models.fields.FloatField', [], {'default': '-1'}),
+            'poster_height': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            'poster_source': ('django.db.models.fields.TextField', [], {'blank': 'True'}),
+            'poster_width': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            'rendered': ('django.db.models.fields.BooleanField', [], {'default': 'False', 'db_index': 'True'}),
+            'stream_aspect': ('django.db.models.fields.FloatField', [], {'default': '1.3333333333333333'}),
+            'stream_info': ('ox.django.fields.DictField', [], {'default': '{}'}),
+            'torrent': ('django.db.models.fields.files.FileField', [], {'default': 'None', 'max_length': '1000', 'blank': 'True'}),
+            'user': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "'items'", 'null': 'True', 'to': "orm['auth.User']"})
+        },
+        'item.itemsort': {
+            'Meta': {'object_name': 'ItemSort'},
+            'accessed': ('django.db.models.fields.DateTimeField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'aspectratio': ('django.db.models.fields.FloatField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'bitrate': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'cinematographer': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'codirector': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'color': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'composer': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'country': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'created': ('django.db.models.fields.DateTimeField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'cutsperminute': ('django.db.models.fields.FloatField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'director': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'duration': ('django.db.models.fields.FloatField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'editor': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'genre': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'height': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'hue': ('django.db.models.fields.FloatField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'imdbId': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'item': ('django.db.models.fields.related.OneToOneField', [], {'related_name': "'sort'", 'unique': 'True', 'primary_key': 'True', 'to': "orm['item.Item']"}),
+            'itemId': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'language': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'lightness': ('django.db.models.fields.FloatField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'lyricist': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'modified': ('django.db.models.fields.DateTimeField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'numberofactors': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'numberofcuts': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'numberoffiles': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'parts': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'pixels': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'producer': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'productionCompany': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'random': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'resolution': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'rightslevel': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'runtime': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'saturation': ('django.db.models.fields.FloatField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'size': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'sound': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'timesaccessed': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'title': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'volume': ('django.db.models.fields.FloatField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'width': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'words': ('django.db.models.fields.BigIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'wordsperminute': ('django.db.models.fields.FloatField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
+            'writer': ('django.db.models.fields.CharField', [], {'max_length': '1000', 'null': 'True', 'db_index': 'True'}),
+            'year': ('django.db.models.fields.CharField', [], {'max_length': '4', 'null': 'True', 'db_index': 'True'})
+        },
+        'sequence.sequence': {
+            'Meta': {'unique_together': "(('sort', 'start', 'end', 'mode'),)", 'object_name': 'Sequence'},
+            'duration': ('django.db.models.fields.FloatField', [], {'default': '0'}),
+            'end': ('django.db.models.fields.FloatField', [], {'default': '-1'}),
+            'hash': ('django.db.models.fields.BigIntegerField', [], {'default': '-9223372036854775808', 'db_index': 'True'}),
+            'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
+            'mode': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
+            'sort': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "'sequences'", 'null': 'True', 'to': "orm['item.ItemSort']"}),
+            'start': ('django.db.models.fields.FloatField', [], {'default': '-1'})
+        }
+    }
+
+    complete_apps = ['sequence']