Main API method to current database schema,
        but it does not actually modify the db connection.

def set_schema(self, schema_name, include_public=True):
        """
        Main API method to current database schema,
        but it does not actually modify the db connection.
        """
        self.tenant = FakeTenant(schema_name=schema_name)
        self.schema_name = schema_name
        self.include_public_schema = include_public
        self.set_settings_schema(schema_name)
        self.search_path_set = False
        # Content type can no longer be cached as public and tenant schemas
        # have different models. If someone wants to change this, the cache
        # needs to be separated between public and shared schemas. If this
        # cache isn't cleared, this can cause permission problems. For example,
        # on public, a particular model has id 14, but on the tenants it has
        # the id 15. if 14 is cached instead of 15, the permissions for the
        # wrong model will be fetched.
        ContentType.objects.clear_cache()