Models.py lista canciones

[razpeitia]

Ok, ya que veo que no pusiste ni un solo modelo, dejame pensar todo por ti.

Código Python:

class Artist(models.Model):
    first_name = models.CharField(max_length=150)
    last_name = models.CharField(max_length=200)
    birthday = models.DateField(blank=True, null=True)
    
    def __unicode__(self):
        return u'%s %s' % (self.first_name, self.last_name)
 
class Song(models.Model):
    name = models.CharField(max_length=200)
    artist = models.ForeignKey(Artist)
    release_date = models.DateTimeField(default=datetime.datetime.now, blank=True, null=True)
    description = models.TextField()
 
    def __unicode__(self):
        return u'%s %s' % (self.name, self.artist)
 
class PlayList(models.Model):
    user = models.ForeignKey(User)
    name = models.CharField(max_length=100)
    creation_datetime = models.DateTimeField(default=datetime.datetime.now, blank=True, null=True)
 
    def __unicode__(self):
        return u'%s %s' % (self.user, self.name)
 
    class Meta:
        unique_together = ('user', 'name')
 
class PlayListInstance(models.Model):
    play_list = models.ForeignKey(PlayList)
    song = models.ForeignKey(Song)
    index = models.IntegerField()
 
    def __unicode__(self):
        return u'%s %s %s' % (self.play_list, self.song, self.index)
 
    class Meta:
        unique_together = ('play_list', 'song', 'index')
 

Te recomiendo leer mas sobre modelos y mas que nada sobre diseño de base datos o al menos entender como trabajan las 4 relaciones básicas OneToOne, OneToMany, ManyToOne y ManyToMany.