class Team(models.Model):

    slug = models.SlugField(unique=True)

    name = models.CharField(max_length=100)

    description = models.TextField(blank=True)

    access = models.CharField(max_length=20, choices=TEAM_ACCESS_CHOICES)

    # member permissions

    permissions = models.ManyToManyField(Permission, blank=True, related_name="member_teams")

    # manager permissions

    created = models.DateTimeField(default=datetime.datetime.now, editable=False)

    @models.permalink

    def get_absolute_url(self):

        return ("team_detail", [self.slug])

    def __unicode__(self):

        return self.name

    def get_state_for_user(self, user):

        try:

            return self.memberships.get(user=user).state

        except Membership.DoesNotExist:

            return None

    def applicants(self):

        return self.memberships.filter(state="applied")

    def invitees(self):

        return self.memberships.filter(state="invited")

    def members(self):

        return self.memberships.filter(state="member")

    def managers(self):

        return self.memberships.filter(state="manager")

MEMBERSHIP_STATE_CHOICES = [

    ("applied", "applied"),