router.py.example

from django.conf import settings

class ConversionRouter(object):
	def db_for_read(self, model,  **hints):
		if model._meta.app_label == "conversion":
			return "legacy"
		return None

	def db_for_write(self, model, **hints):
		if model._meta.app_label == "conversion":
			return "legacy"
		return None
	
	def allow_syncdb(self, db, model):
		if db == "import_db":
			return model._meta.app_label == "conversion"

		elif model._meta.app_label == "conversion":
			return False

		return None
	
	"""
	def allow_relation(self, obj1, obj2, **hints):
		if obj1._meta.app_label == 'django_site_errors' or obj2._meta.app_label == 'django_site_errors':
			return True
		return None

	def allow_relation(self, obj1, obj2, **hints):
		"Allow any relation between two objects in the db pool"
		db_list = ('central','django_site_errors')
		if obj1 in db_list and obj2 in db_list:
			return True
		return None
	"""