AWS::NoValue

Registered by Kevin Fox on 2014-03-15

In CFN, there is now a psudo param that allows the key/value pair to be completely removed if assigned the value of the psudoparam. For example:
foo: {"Ref" : "AWS::NoValue"}

causes foo to be removed from the resource rather then having a None value. This is best used in combination with Fn::If

This feature would allow paramaters to be truely optional rather then needing multiple template versions, one that allows the value to be set, and another that doesn't have the key mentioned at all. For example, set a security group on a neutron port if specified, and use the neutron default if not set at all by removing the security_group key.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Kevin Fox
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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