Comment 26 for bug 1445412

Reviewed: https://review.openstack.org/175589
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=3fbb39c3fdb6de342a58b9a8258390a1a522170a
Submitter: Jenkins
Branch: stable/juno

commit 3fbb39c3fdb6de342a58b9a8258390a1a522170a
Author: Kevin Benton <email address hidden>
Date: Fri Apr 17 03:36:50 2015 -0700

    Set loading strategy to joined for Routerport/Port

    The RouterPort model has a relationship to the ports model which
    is frequently relied on to get the port IDs of interfaces attached
    to a router. However, this defaults to the loading strategy to
    'select', which meant a new query was being emitted for every
    interface to the ports table just to get the ID.

    This patch adjusts the relationship to be 'joined' by default so
    one query will fetch the related ports.

    Another option would have been not to use the port object at all since
    the ID is all that the callers were usually interested in. However,
    they would end up using the ID to do a port lookup, which is being
    optimized away in another patch anyway so the full port object from
    the relationship will end up getting used.

    Change-Id: Id1ae35f845f7367d5f1f065c6fa637da7b980a2b
    Partial-Bug: #1445412
    (cherry picked from commit 10b17a884452736a6b214bcb7705b955192a1748)