Unhandled rejection TypeError: gremlin.createClient is not a function

[laran]

I ran npm i --save gremlin and created a model with graph support. I get this error when my express server starts up:

  express-cassandra executing query: SELECT * FROM system_schema.types WHERE keyspace_name = 'shrnk' AND type_name = 'url'; +0ms
  express-cassandra executing query: SELECT * FROM system_schema.types WHERE keyspace_name = 'shrnk' AND type_name = 'href'; +12ms
Unhandled rejection TypeError: gremlin.createClient is not a function
    at Object.create_gremlin_client (/Users/laran/workspace/shrnk/api/node_modules/express-cassandra/lib/orm/apollo.js:137:36)
    at Object._assert_gremlin_graph (/Users/laran/workspace/shrnk/api/node_modules/express-cassandra/lib/orm/apollo.js:142:30)
    at Object.tryCatcher (/Users/laran/workspace/shrnk/api/node_modules/bluebird/js/release/util.js:16:23)
    at Object.ret [as assertGremlinGraphAsync] (eval at makeNodePromisifiedEval (/Users/laran/workspace/shrnk/api/node_modules/bluebird/js/release/promisify.js:184:12), <anonymous>:13:39)
    at Object.onUserDefinedAggregates (/Users/laran/workspace/shrnk/api/node_modules/express-cassandra/lib/orm/apollo.js:409:37)
    at Object._assert_user_defined_aggregates (/Users/laran/workspace/shrnk/api/node_modules/express-cassandra/lib/orm/apollo.js:316:7)
    at Object.f (/Users/laran/workspace/shrnk/api/node_modules/express-cassandra/lib/orm/apollo.js:424:14)
    at Object._assert_user_defined_functions (/Users/laran/workspace/shrnk/api/node_modules/express-cassandra/lib/orm/apollo.js:251:7)
    at Object.f (/Users/laran/workspace/shrnk/api/node_modules/express-cassandra/lib/orm/apollo.js:436:14)
    at /Users/laran/workspace/shrnk/api/node_modules/express-cassandra/lib/orm/apollo.js:239:7
    at tryCatcher (/Users/laran/workspace/shrnk/api/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/Users/laran/workspace/shrnk/api/node_modules/bluebird/js/release/promise.js:512:31)
    at Promise._settlePromise (/Users/laran/workspace/shrnk/api/node_modules/bluebird/js/release/promise.js:569:18)
    at Promise._settlePromise0 (/Users/laran/workspace/shrnk/api/node_modules/bluebird/js/release/promise.js:614:10)
    at Promise._settlePromises (/Users/laran/workspace/shrnk/api/node_modules/bluebird/js/release/promise.js:694:18)
    at _drainQueueStep (/Users/laran/workspace/shrnk/api/node_modules/bluebird/js/release/async.js:138:12)

I don't think I missed any steps from what I read in the docs. But I must have missed something. What did I miss?

[laran]

So, I had gremlin 3.3.0 installed (currently the latest version). But the Janusgraph support in express-cassandra seems to rely on version 2.7.0. The javascript gremlin API has changed since version 2.7.0.

I've started working on updating Janusgraph support. If anyone's interested in collaborating, the help would be welcome. The modifications seem pretty straightforward. But I'm a noob when it comes to Janusgraph.