Tracks Model

Take a look at models.py. Make a superuser

$ python3 manage.py createsuperuser
Username (leave blank to use 'csev'): dj4e
Email address: sample@sample.com
Password: 
Password (again): 
Superuser created successfully.

Sample execution

$ python3 manage.py shell
>>> from tracks.models import Artist, Genre, Album, Track;
>>> zep = Artist(name='Led Zepplin')
>>> zep.save()
>>> zep.id
1
>>> abc = Artist(name='ACDC')
>>> abc.save()

>>> Artist.objects.values()
<QuerySet [{'id': 1, 'name': 'Led Zepplin'}, {'id': 2, 'name': 'ACDC'}]>

>>> made = Album(title='Who Made Who', artist=abc)
>>> made.save()
>>> zep_iv = Album(title='IV', artist=zep)
>>> zep_iv.save()
>>> ROCK = Genre(name='Rock')
>>> ROCK.save()
>>> met = Genre(name='Metal')
>>> met.save()

>>> x = Track(title='Black Dog', rating=5, length=297, count=9, album=zep_iv, genre=ROCK)
>>> x.save()
>>> x.id
1
>>> x = Track(title='Stairway', rating=5, length=482, count=0, album=zep_iv, genre=ROCK)
>>> x.save()
>>> x.id
2
>>> x = Track(title='About to Rock', rating=5, length=313, count=0, album=made, genre=met)
>>> x.save()
>>> x = Track(title='Who Made Who', rating=5, length=207, count=0, album=made, genre=met)
>>> x.save()
>>>
>>> Track.objects.values()
<QuerySet [{'id': 1, 'title': 'Black Dog', 'rating': 5, 'length': 297, 'count': 9,
 'album_id': 2, 'genre_id': 1},
 {'id': 2, 'title': 'Stairway', 'rating': 5, 'length': 482, 'count': 0,
 'album_id': 2, 'genre_id': 1},
 {'id': 3, 'title': 'About to Rock', 'rating': 5, 'length': 313, 'count': 0,
 'album_id': 1, 'genre_id': 2},
 {'id': 4, 'title': 'Who Made Who', 'rating': 5, 'length': 207, 'count': 0,
 'album_id': 1, 'genre_id': 2}]>

>>> first = Track.objects.get(pk=1)
>>> first
<Track: Black Dog>
>>> print(first)
Black Dog
>>> print(first.genre)
Rock
>>> print(first.genre.name)
Rock
>>>
>>> print(first.album)
IV
>>> print(first.album.artist)
Led Zepplin
>>>

>>> from tracks.models import Artist, Genre, Album, Track;
>>> x = Artist.objects.get(pk=1)
>>> x
<Artist: Led Zepplin>
>>> x.album_set.values()
<QuerySet [{'id': 2, 'title': 'IV', 'artist_id': 1}]>