Comment 11 for bug 1314401

Reviewed: https://review.openstack.org/94329
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=349a6f04b53309f7fa8f3225f98d41670888d20c
Submitter: Jenkins
Branch: master

commit 349a6f04b53309f7fa8f3225f98d41670888d20c
Author: Thomas Spatzier <email address hidden>
Date: Tue May 20 11:08:59 2014 +0200

    Do no re-validate parameters for existing stacks

    This patch disables validation of stack parameters values when
    loading existing stacks from the database. The old behavior was
    to always validate stack parameter values when initializing a
    Stack object. However, this causes problems especially with
    custom constraints when a constraint could be fulfilled during
    stack creation but cannot be fulfilled at a later point (e.g.
    when a flavor or keypair has been deleted). In such a case,
    the existing stack became completely unusable.

    This patch changes the behavior to not do parameter validation
    for existing stacks. The assumption is that validation at stack
    creation time should be sufficient to make sure the stack is valid,
    so only valid stacks end up in the database. Therefore, validating
    parameters again when loading stacks is not really required.

    Change-Id: I0947c2dcfb9db4c81b07de582aab86f262d0c008
    Closes-Bug: #1314401