Don't hint explicitly while deleting a config still referenced

[Yingzhe Zeng]

Create a deployment by "deployment-create" subcommand.
Then try to delete the config which referenced by the created deployment, using "config-delete" subcommand.

Will get this error message:
ERROR: Remote error: DBError (pymysql.err.IntegrityError) (1048, u"Column 'config_id' cannot be null") [SQL: u'UPDATE software_deployment SET config_id=%s WHERE software_deployment.id = %s'] [parameters: (None, u'98a3229b-3a34-494d-bdcb-6bb7c0ecb648')]
[u'

This error message doesn't reveal the reason explicitly, cause this's an internal error.
User can't quite understand why deleting failed from it.

[Di XiaoLi (dixiaoli)]

Yingzhe, are you working on this ? Do you mind if I submit a patch for this ?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/294386

[Yingzhe Zeng (zengyingzhe)]

Not at all.
XiaoLi, thanks for your help.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/294386
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=e767eb48b1f546106dd37ddba81efc0cdd2deb0e
Submitter: Jenkins
Branch: master

commit e767eb48b1f546106dd37ddba81efc0cdd2deb0e
Author: xiaolihope <email address hidden>
Date: Fri Mar 18 12:31:42 2016 +0800

    Raise explicit exception when deleting config which has been referenced

    This change aims to raise an explicit exception when trying to delete
    a software config which has been referenced by deployment.

    Change-Id: Ifa9492f003910b07fce4891fc88a566d6340f5a3
    Closes-Bug: #1509915

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack/heat 7.0.0.0b1 development milestone.