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https://issues.apache.org/jira/browse/NIFI-12121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17785001#comment-17785001
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ASF subversion and git services commented on NIFI-12121:
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Commit bfe97dc321d34412fe632b1040221487525ea0f4 in nifi's branch
refs/heads/support/nifi-1.x from Michael W Moser
[ https://gitbox.apache.org/repos/asf?p=nifi.git;h=bfe97dc321 ]
NIFI-12121 Added Transform Result Filter to JSLTTransformJSON
This closes #7922
Signed-off-by: David Handermann <exceptionfact...@apache.org>
(cherry picked from commit 832d4455c19d3271735b90b6b4f27a32465fa8e7)
> Update JSLTTransformJSON to output null-value JSON objects
> ----------------------------------------------------------
>
> Key: NIFI-12121
> URL: https://issues.apache.org/jira/browse/NIFI-12121
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Extensions
> Affects Versions: 1.23.2
> Reporter: Nick dos Remedios
> Assignee: Michael W Moser
> Priority: Minor
> Fix For: 2.latest
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> The current implementation of the JSLTTransformJSON processor is configured
> using the default {{com.schibsted.spt.data.jslt.Parser}} "filter"
> configuration that results in the removal of any JSON objects where the value
> is `null`.
> When processing data in Nifi with the "infer schema" option for a
> reader/writer controller service, this results in some {*}data not conforming
> to the "original" schema{*}, once it passed through the JSLTTransformJSON
> processor. As any JSON objects with a null value are removed from the final
> JSON output. See [this issue|https://github.com/schibsted/jslt/issues/308]
> that illustrates this problem.
> The [JSLT API allows for the ability to
> configure|https://github.com/schibsted/jslt/blob/master/docs/api.md#object-key-filter]
> whether null-value objects are retained or remove. I've checked the Nifi
> JSLTTransformJSON source and it does not currently set
> {{.withObjectFilter(filter)}} on the {{Parse}} object.
> I'd like to see the JSLTTransformJSON processor be updated with a
> user-selectable option to include null-value objects in the output (or not).
> Which would optionally set {{{}Parser.withObjectFilter(true){}}}.
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