unique=True on model behave strangely when there is a ListField in the model

[Gregory TAPPERO]

Hi,

I found something strange when I try to save an instance which as a unique Attribute field email and a List of Reference fields rooms_visited.

As soon as I add an entry to my list the save() of my instance fails on the uniqueness of the Attribute field 'email'.

Strangely, I am able to update the email field then save() without problems.
Removing unique=True works and I only have one user created, not two.

from redisco import models

import string
import redisco

redisco.connection_setup(host='localhost', db=5)

class UserRoomVisit(models.Model):
    code = models.Attribute(required=True)
    joined_date = models.DateTimeField(auto_now_add=True)

class User(models.Model):
    # for some reasons unique True fails to validate on save !
    email = models.Attribute(required=True, indexed=True, unique=True)
    rooms_visited = models.ListField(UserRoomVisit)

class Room(models.Model):
    code = models.Attribute(required=True, indexed=True, unique=True)       
    owner = models.ReferenceField(User)

u = User(email="[e-mail]")
u.save()
r = Room(owner=u, code="xxx")
r.save()
e = UserRoomVisit(code="xxx")
e.save()

print u # <User:1 {'rooms_visited': [], 'email': '[e-mail]'}>
u.rooms_visited.append(e)
print u # <User:1 {'rooms_visited': [<UserRoomVisit:1 {'joined_date': datetime.datetime(2012, 10, 5, 19, 26, 55, 382587), 'code': 'ppp'}>], 'email': '[e-mail]'}>
errors = u.save()

print errors # [('email', 'not unique')]