Synnefo

def get_existing_users():

    """

    Retrieve user ids stored in cyclades user agnostic models.

    """

    # also check PublicKeys a user with no servers/networks exist

    from synnefo.ui.userdata.models import PublicKeyPair

    from synnefo.db.models import VirtualMachine, Network

    keypairusernames = PublicKeyPair.objects.filter().values_list('user',

                                                               flat=True)

    serverusernames = VirtualMachine.objects.filter().values_list('userid',

                                                                   flat=True)

    networkusernames = Network.objects.filter().values_list('userid',

                                                            flat=True)

    return set(list(keypairusernames) + list(serverusernames) + \

           list(networkusernames))