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import os
from config import config
from sqlalchemy import create_engine
engine = create_engine(config.get('db_path'))
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
from sqlalchemy import Column, Integer, String, ForeignKey
from sqlalchemy.orm import relationship, backref
from sqlalchemy import and_
from sqlalchemy.orm.exc import NoResultFound
class Directory(Base):
__tablename__ = 'directories'
id = Column(Integer, primary_key = True)
path = Column(String, nullable = False, index = True)
parent_id = Column(Integer, ForeignKey('directories.id'))
parent = relationship('Directory', backref = backref('children'), remote_side = [id])
#children = relationship('Directory', lazy = 'joined', join_depth = 2)
def __init__(self, path, parent_id = None):
self.path = path
self.parent_id = parent_id
def __repr__(self):
return '<Directory("{0}")>'.format(self.path.encode('utf-8'))
@staticmethod
def get(session, path, parent_id = None):
try:
directory = session.query(Directory).filter(Directory.path == path).one()
except NoResultFound:
directory = Directory(path, parent_id)
session.add(directory)
session.commit()
return directory
class Artist(Base):
__tablename__ = 'artists'
id = Column(Integer, primary_key = True)
name = Column(String, nullable = False, index = True)
def __init__(self, name):
self.name = name
def __repr__(self):
return '<Artist("{0}")>'.format(self.name.encode('utf-8'))
@staticmethod
def get(session, name):
try:
artist = session.query(Artist).filter(Artist.name == name).one()
except NoResultFound:
artist = Artist(name)
session.add(artist)
session.commit()
return artist
class Album(Base):
__tablename__ = 'albums'
id = Column(Integer, primary_key = True)
name = Column(String, nullable = False, index = True)
artist_id = Column(Integer, ForeignKey('artists.id'), nullable = False)
artist = relationship(Artist, backref = backref('albums', order_by = name))
def __init__(self, name, artist_id):
self.name = name
self.artist_id = artist_id
def __repr__(self):
return '<Album("{0}")>'.format(self.name)
@staticmethod
def get(session, name, artist_id = None):
try:
album = session.query(Album).filter(Album.name == name).one()
except NoResultFound:
album = Album(name, artist_id)
session.add(album)
session.commit()
return album
class Track(Base):
__tablename__ = 'tracks'
id = Column(Integer, primary_key = True)
name = Column(String, index = True)
num = Column(Integer)
filename = Column(String, nullable = False, index = True)
file_index = Column(Integer)
directory_id = Column(Integer, ForeignKey('directories.id'), nullable = False)
artist_id = Column(Integer, ForeignKey('artists.id'))
album_id = Column(Integer, ForeignKey('albums.id'))
directory = relationship(Directory, backref = backref('tracks', order_by = filename))
artist = relationship(Artist, backref = backref('artists'))
album = relationship(Album, backref = backref('tracks'))
def __init__(self, name, num, filename, file_index, directory_id, artist_id, album_id):
self.name = name
self.num = num
self.filename = filename
self.file_index = file_index
self.directory_id = directory_id
self.artist_id = artist_id
self.album_id = album_id
def __repr__(self):
return '<Track("{0}")>'.format(self.filename.encode('utf-8'))
@staticmethod
def get(session, name, num, filename, file_index, directory_id, artist_id, album_id):
try:
track = session.query(Track).filter(and_(Track.filename == filename, Track.file_index == file_index)).one()
except NoResultFound:
track = Track(name, num, filename, file_index, directory_id, artist_id, album_id)
session.add(track)
return track
@staticmethod
def find(session, path, track = None):
directory, filename = os.path.split(path)
return session.query(Track).filter(and_(Track.filename == filename, Directory.path == directory, Track.file_index == track)).one()
def get_path(self):
return os.path.join(self.directory.path, self.filename)
def get_relpath(self):
return os.path.relpath(self.get_path(), config.get('music_root'))
def get_metadata(self):
metadata = {}
if self.name:
metadata['title'] = self.name
if self.artist:
metadata['artist'] = self.artist.name
if self.album:
metadata['album'] = self.album.name
return metadata
Base.metadata.create_all(engine)
from sqlalchemy.orm import sessionmaker
Session = sessionmaker(bind = engine)
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