def add_permission(self, owner, email): return ListPermissionDb(owner=owner, email=email).put()
def get_permissions_by_email(self, email): return ListPermissionDb.all().filter('email =', email)
def get_permissions_by_email(self, email): return ListPermissionDb.all().filter("email =", email)
def get_permission(self, permission_id): return ListPermissionDb.get_by_id(permission_id)