Destroy token implemented for relational

Cleaned code for graphdb
see pdonorio/restangulask#23

restapi/resources/services/authentication/graphdb.py

@@ -186,13 +186,7 @@ def invalidate_token(self, user=None, token=None):
     def destroy_token(self, token_id):
         try:
             token = self._graph.Token.nodes.get(jti=token_id)
-
-            nodes = token.emitted_for.all()
-            if len(nodes) > 0:
-                token.emitted_for.disconnect(nodes[0])
-
             token.delete()
-
             return True
 
         except self._graph.Token.DoesNotExist:

restapi/resources/services/authentication/relationaldb.py

@@ -189,4 +189,12 @@ def invalidate_token(self, user=None, token=None):
             logger.warning("Could not invalidate token")
 
     def destroy_token(self, token_id):
-        pass
+        token = self._db.Token.query.filter_by(jti=token_id).first()
+
+        if token is None:
+            return False
+
+        token.emitted_for = None    # required?
+        self._db.session.delete(token)
+        self._db.session.commit()
+        return True