pythondjangoforeign-key-relationship

Django - Get Foreign key objects in single query?

I'm finding django foreign keys a bit confusing, is there any way to do the view below, using a single query?

# Model
class Programme(models.Model):
    name = models.CharField(max_length = 64)

class Actor(models.Model):
    programme = models.ForeignKey(Programme)
    name = models.CharField(max_length = 64)


# View
def list_actors( request, programme_id):
    programme = Programme.objects.filter(id = programme_id)[0]
    actors = Actor.objects.filter(programme = programme_id)
    json = simplejson.dumps( [{
        'name': str(actor.name),
        'rating': str(actor.rating),} for actor in actors] )
    return HttpResponse(json, mimetype='application/javascript')
Solution

  • You query Programme and assign to programme, but you never use the result anywhere. Just remove that line.