"Rails-like" relationship urls

The idea is to take the best from RoR ! ;)
I think their approach of relationship browsing is very intuitive and great to use.

With the following example taken from the doc
```python
class Album(models.Model):
    album_name = models.CharField(max_length=100)
    artist = models.CharField(max_length=100)

class Track(models.Model):
    album = models.ForeignKey(Album, related_name='tracks')
    order = models.IntegerField()
    title = models.CharField(max_length=100)
    duration = models.IntegerField()

    class Meta:
        unique_together = ('album', 'order')
        order_by = 'order'

    def __unicode__(self):
        return '%d: %s' % (self.order, self.title)
```

we could access the tracks of an album with the url `/api/album/1/tracks`.

I'm working on an implementation, but all the ideas, thoughts and opinions are welcome.
First thing, do you think it's a good idea ?