Hi - I've got a bit of a conundrum.
I have two models, Category and Photo which look something like this:
class Category(models.Model):
title = models.CharField(maxlength=80)
slug = models.SlugField(prepopulate_from=("title",))
class Photo(models.Model):
catalogue_number = models.IntegerField(maxlength=80)
slug = models.SlugField(prepopulate_from=("catalogue_number",))
category = models.ForeignKey(Category,blank=True)
There is a one-to-many relationship defined so that a Photo can be
assigned a Category.
Now, what I want to be able to do is get a list of Categories, but
ONLY those Categories which have been assigned to one or more Photos.
I can think of plenty of ugly ways to work around this, but wondered
whether anyone had a graceful solution?
-Phil
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