Jira (HI-616) Feature request: Add a way to look up undef values

[Mindy Moreland (JIRA)]

Mindy Moreland created an issue

Hiera / HI-616 Feature request: Add a way to look up undef values Issue Type: Improvement Assignee: Unassigned Created: 2020/01/23 10:22 AM Priority: Normal Reporter: Mindy Moreland Feedback received on the docs site, January 2020, requested a way to "elegantly handle lookups where the key exists in Hiera but with an undef value."  Per Henrik: "it would be possible to modify hiera and add a lookup_option that would control if a looked up `undef` results in an `undef` value or `not found` - this would be per key  (as we don't want this to be controlled by a global setting)."      Add Comment

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[Henrik Lindberg (JIRA)]

Henrik Lindberg commented on HI-616

Re: Feature request: Add a way to look up undef values This ticket is in the wrong place, it should be moved to PUP project as HI is for the deprecated hiera 3 which is only maintained for security related patches. The idea for the implementation is to add an option to the features in lookup_options where a user can state that the result should be "not found" if the looked up value otherwise would result in undef. I see no harm in offering such an option as there is no work around when this behaviour is wanted via APL. (For direct calls to the lookup function it is already possible to differentiate between undef result and "not found", so this is primarily for APL).

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