Implement db get_[un]associated_nodes

These method were just stubs.
This patch implements them in db/sqlalchemy/api.py, and a subsequent
patch will expose this functionality via the API.

Change-Id: Iae68cbe3bf4e84a0f47a0770695bed9dae78aa95

1 files changed, 3 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 7a2a3328c..6cbf3d611 100644
--- a/tox.ini
+++ b/tox.ini
@@ -31,6 +31,8 @@ commands =
 commands = {posargs}
 
 [flake8]
-ignore = E12
+# E711: ignored because it is normal to use "column == None" in sqlalchemy
+
+ignore = E12,E711
 builtins = _
 exclude =  .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,*ironic/nova*,tools