diff --git a/api/browse.py b/api/browse.py
index c5ffd5c..bb579c4 100644
--- a/api/browse.py
+++ b/api/browse.py
@@ -19,7 +19,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from flask import request
-from web import app
+from web import app, store
 from db import Folder, Artist, Album, Track
 from . import get_entity
 import uuid, time, string
@@ -31,7 +31,7 @@ def list_folders():
 			'musicFolder': [ {
 				'id': str(f.id),
 				'name': f.name
-			} for f in Folder.query.filter(Folder.root == True).order_by(Folder.name).all() ]
+			} for f in store.find(Folder, Folder.root == True).order_by(Folder.name) ]
 		}
 	})
 
@@ -46,25 +46,25 @@ def list_indexes():
 			return request.error_formatter(0, 'Invalid timestamp')
 
 	if musicFolderId is None:
-		folder = Folder.query.filter(Folder.root == True).all()
+		folder = store.find(Folder, Folder.root == True)
 	else:
 		try:
 			mfid = uuid.UUID(musicFolderId)
 		except:
 			return request.error_formatter(0, 'Invalid id')
 
-		folder = Folder.query.get(mfid)
+		folder = store.get(Folder, mfid)
 
-	if not folder or (type(folder) is not list and not folder.root):
+	if not folder or (type(folder) is Folder and not folder.root):
 		return request.error_formatter(70, 'Folder not found')
 
-	last_modif = max(map(lambda f: f.last_scan, folder)) if type(folder) is list else folder.last_scan
+	last_modif = max(map(lambda f: f.last_scan, folder)) if type(folder) is not Folder else folder.last_scan
 
 	if (not ifModifiedSince is None) and last_modif < ifModifiedSince:
 		return request.formatter({ 'indexes': { 'lastModified': last_modif * 1000 } })
 
 	# The XSD lies, we don't return artists but a directory structure
-	if type(folder) is list:
+	if type(folder) is not Folder:
 		artists = []
 		childs = []
 		for f in folder:
@@ -121,7 +121,7 @@ def show_directory():
 def list_artists():
 	# According to the API page, there are no parameters?
 	indexes = {}
-	for artist in Artist.query.all():
+	for artist in store.find(Artist):
 		index = artist.name[0].upper() if artist.name else '?'
 		if index in map(str, xrange(10)):
 			index = '#'
diff --git a/db.py b/db.py
index b2914ca..3c428bc 100644
--- a/db.py
+++ b/db.py
@@ -26,7 +26,7 @@ from storm.variables import Variable
 
 import uuid, datetime, time
 import os.path
- 
+
 def now():
 	return datetime.datetime.now().replace(microsecond = 0)
 
@@ -71,14 +71,14 @@ class Folder(object):
 		if self.has_cover_art:
 			info['coverArt'] = str(self.id)
 
-		starred = StarredFolder.query.get((user.id, self.id))
+		starred = Store.of(self).get(StarredFolder, (user.id, self.id))
 		if starred:
 			info['starred'] = starred.date.isoformat()
 
-		rating = RatingFolder.query.get((user.id, self.id))
+		rating = Store.of(self).get(RatingFolder, (user.id, self.id))
 		if rating:
 			info['userRating'] = rating.rating
-		avgRating = RatingFolder.query.filter(RatingFolder.rated_id == self.id).value(func.avg(RatingFolder.rating))
+		avgRating = Store.of(self).find(RatingFolder, RatingFolder.rated_id == self.id).avg(RatingFolder.rating)
 		if avgRating:
 			info['averageRating'] = avgRating
 
@@ -95,10 +95,10 @@ class Artist(object):
 			'id': str(self.id),
 			'name': self.name,
 			# coverArt
-			'albumCount': len(self.albums)
+			'albumCount': self.albums.count()
 		}
 
-		starred = StarredArtist.query.get((user.id, self.id))
+		starred = Store.of(self).get(StarredArtist, (user.id, self.id))
 		if starred:
 			info['starred'] = starred.date.isoformat()
 
@@ -118,14 +118,16 @@ class Album(object):
 			'name': self.name,
 			'artist': self.artist.name,
 			'artistId': str(self.artist_id),
-			'songCount': len(self.tracks),
-			'duration': sum(map(lambda t: t.duration, self.tracks)),
-			'created': min(map(lambda t: t.created, self.tracks)).isoformat()
+			'songCount': self.tracks.count(),
+			'duration': sum(self.tracks.values(Track.duration)),
+			'created': min(self.tracks.values(Track.created)).isoformat()
 		}
-		if self.tracks[0].folder.has_cover_art:
-			info['coverArt'] = str(self.tracks[0].folder_id)
 
-		starred = StarredAlbum.query.get((user.id, self.id))
+		track_with_cover = self.tracks.find(Track.folder_id == Folder.id, Folder.has_cover_art).any()
+		if track_with_cover:
+			info['coverArt'] = str(track_with_cover.folder_id)
+
+		starred = Store.of(self).get(StarredAlbum, (user.id, self.id))
 		if starred:
 			info['starred'] = starred.date.isoformat()
 
@@ -194,14 +196,14 @@ class Track(object):
 		if self.folder.has_cover_art:
 			info['coverArt'] = str(self.folder_id)
 
-		starred = StarredTrack.query.get((user.id, self.id))
+		starred = Store.of(self).get(StarredTrack, (user.id, self.id))
 		if starred:
 			info['starred'] = starred.date.isoformat()
 
-		rating = RatingTrack.query.get((user.id, self.id))
+		rating = Store.of(self).get(RatingTrack, (user.id, self.id))
 		if rating:
 			info['userRating'] = rating.rating
-		avgRating = RatingTrack.query.filter(RatingTrack.rated_id == self.id).value(func.avg(RatingTrack.rating))
+		avgRating = Store.of(self).find(RatingTrack, RatingTrack.rated_id == self.id).avg(RatingTrack.rating)
 		if avgRating:
 			info['averageRating'] = avgRating