[TINKERPOP-2312] Empty keys to group() should group to null

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Done
• Affects Version/s: 3.5.0
• Fix Version/s: 3.5.0
• Component/s: process
• Assignee: Stephen Mallette
• Reporter: Stephen Mallette
• Created: 06/Nov/19 17:21
• Updated: 23/Jan/20 13:39
• Resolved: 23/Jan/20 13:39

Description

With TINKERPOP-2235 in place, null becomes valid to the language which means that we could fix:

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

so that users dont' need to do added filtering magic to deal with those kinds of exceptions.

Issue Links

• links to: GitHub Pull Request #1240