martsberger

# You can put the EqualsAny class in a utility file somewhere, It's necessary
# in order to compare the result of ArrayAgg with a column

from django.db.models import Field

@Field.register_lookup
class EqualsAny(Lookup):
    """
    Adds the `__any` lookup for generating SQL like:
    

ryanpitts

'''
given a Model with:

   category    = models.CharField(max_length=32, choices=CATEGORY_CHOICES)
   pubdate     = models.DateTimeField(default=datetime.now)
   <other fields>

Fetch the item from each category with the latest pubdate.

'''