How to (intentionally) skip an app with Django syncdb

I have several django apps:

INSTALLED_APPS = (
    'geonode.exposure',
    'geonode.isc_viewer',
    'geonode.geodetic',
    'geonode.observations',
    'geonode.ged4gem',

      

        
        
        
      

    

I need to manage all of them except one c syncdb

. How can I get to syncdb

intentionally skip the application geonode.exposure

?

Update: I have not covered the full configuration, please let me elaborate further: I use south to manage migrations and fixtures db for all applications except for impact cases. The Exposure app accesses an external database and uses a router to do this (which is why I want syncdb to skip this). My router settings look like this:

class GedRouter(object):
    def db_for_read(self, model, **hints):
        "Point all operations on ged models to 'geddb'"
        if model._meta.app_label == 'exposure':
            return 'geddb'
        return 'default'

    def allow_syncdb(self, db, model):
        if db == 'geddb' or model._meta.app_label == "ged":
            return False # we're not using syncdb on our legacy database
        else: # but all other models/databases are fine
            return True

      

        
        
        
      

    

Doesn't the south respect the allow_syncdb method? south works syncbd in exposure app because i dont have migration for it?