Stephen Mallette created TINKERPOP-2314: -------------------------------------------
Summary: Employ by(String) for Map when possible and improve errors around incorrect types Key: TINKERPOP-2314 URL: https://issues.apache.org/jira/browse/TINKERPOP-2314 Project: TinkerPop Issue Type: Improvement Components: process Affects Versions: 3.3.9 Reporter: Stephen Mallette Assignee: Stephen Mallette This bit of Gremlin demonstrates both problems for uses of {{by(String)}}: {code} gremlin> g.V().values('age').project('x').by('name') java.lang.Integer cannot be cast to org.apache.tinkerpop.gremlin.structure.Element Type ':help' or ':h' for help. Display stack trace? [yN]n {code} First, users typically expect this to work because they figure they are just grabbing a keys value from a {{Map}} and then get the difficult to understand message which doesn't tell you how to resolve. As a side note, the way to resolve is with: {code} gremlin> g.V().valueMap().project('x').by(select('name')) ==>[x:[marko]] ==>[x:[stephen]] ==>[x:[matthias]] ==>[x:[daniel]] ==>[x:[gremlin]] ==>[x:[tinkergraph]] {code} -- This message was sent by Atlassian Jira (v8.3.4#803005)