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https://issues.apache.org/jira/browse/TINKERPOP-2312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17017083#comment-17017083
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ASF GitHub Bot commented on TINKERPOP-2312:
-------------------------------------------
spmallette commented on pull request #1240: TINKERPOP-2312 Empty keys to
group() should group to null
URL: https://github.com/apache/tinkerpop/pull/1240
https://issues.apache.org/jira/browse/TINKERPOP-2312
Basically, this:
```text
gremlin> g.V().group().by('age')
The property does not exist as the key has no associated value for the
provided element: v[3]:age
Type ':help' or ':h' for help.
Display stack trace? [yN]n
```
now does this:
```text
gremlin> g.V().groupCount().by('age')
==>[null:2,32:1,35:1,27:1,29:1]
```
which has its conveniences but also produces a result that would be easier
to follow for new users as opposed to the old exception.
All tests pass with `docker/build.sh -t -n -i`
VOTE +1
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> Empty keys to group() should group to null
> ------------------------------------------
>
> Key: TINKERPOP-2312
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2312
> Project: TinkerPop
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.5.0
> Reporter: Stephen Mallette
> Priority: Major
>
> With TINKERPOP-2235 in place, {{null}} becomes valid to the language which
> means that we could fix:
> {code}
> gremlin> g.V().group().by('age')
> The property does not exist as the key has no associated value for the
> provided element: v[3]:age
> Type ':help' or ':h' for help.
> Display stack trace? [yN]n
> {code}
> so that users dont' need to do added filtering magic to deal with those kinds
> of exceptions.
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