from mongoframes import *

# Define some document frames (a.k.a models)
class Dragon(Frame):
    _fields = {'name', 'loot'}

class Item(Frame):
    _fields = {'desc', 'worth'}

# Create a dragon and loot to boot
Item(desc='Sock', worth=1).insert()
Item(desc='Diamond', worth=100).insert()
Dragon(name='Burt', loot=Item.many()).insert()

# Have Burt boast about his loot
burt = Dragon.one(Q.name == 'Burt', projection={'loot': {'$ref': Item}})
for item in burt.loot:
    print('I have a {0.desc} worth {0.worth} crown'.format(item))