Question

Hey, I have models like this:

class Galleries(models.Model):
  creation_date = models.DateTimeField()
  name = models.CharField(max_length=255, unique=True)
  gallery_type = models.ForeignKey(Categories)

class Categories(models.Model):
  handle = models.CharField(max_length=255, unique=True)

class Values(models.Model):
  category = models.ForeignKey(Categories)
  language = models.CharField(max_length=7)
  category_name = models.CharField(max_length=50)

And now, I just want to reach the values of categories by starting from Galleries. For example: galleries = Galleries.objects.get(id=1). And now I want to reach somehow the values by using this “galleries” object… To get values with specific language would be much more better… I miss skills in Django ORM, so if you can, please point me to some docs or give some code example. Thanks!

Answer 1

galleries = Galleries.objects.get(id=1)
values = galleries.gallery_type.values_set.filter(language='language')

Interestingly, you used the exact wording that the docs use to refer to the related field lookups. I always found the definition strange to the gut, maybe because they put it in quotes.

FOLLOWING RELATIONSHIPS “BACKWARD”

http://docs.djangoproject.com/en/1.2/topics/db/queries/#following-relationships-backward