Unhandled rejection SequelizeValidationError: notNull Violation: foo cannot be null
at /path/to/project/node_modules/sequelize/lib/instance-validator.js:74:14
at bound (domain.js:280:14)
at runBound (domain.js:293:12)
at tryCatcher (/path/to/project/node_modules/bluebird/js/release/util.js:16:23)
at Promise._settlePromiseFromHandler (/path/to/project/node_modules/bluebird/js/release/promise.js:510:31)
at Promise._settlePromise (/path/to/project/node_modules/bluebird/js/release/promise.js:567:18)
at Promise._settlePromise0 (/path/to/project/node_modules/bluebird/js/release/promise.js:612:10)
at Promise._settlePromises (/path/to/project/node_modules/bluebird/js/release/promise.js:691:18)
at Promise._fulfill (/path/to/project/node_modules/bluebird/js/release/promise.js:636:18)
at PromiseArray._resolve (/path/to/project/node_modules/bluebird/js/release/promise_array.js:125:19)
at PromiseArray._promiseFulfilled (/path/to/project/node_modules/bluebird/js/release/promise_array.js:143:14)
at Promise._settlePromise (/path/to/project/node_modules/bluebird/js/release/promise.js:572:26)
at Promise._settlePromise0 (/path/to/project/node_modules/bluebird/js/release/promise.js:612:10)
at Promise._settlePromises (/path/to/project/node_modules/bluebird/js/release/promise.js:691:18)
at Async._drainQueue (/path/to/project/node_modules/bluebird/js/release/async.js:138:16)
at Async._drainQueues (/path/to/project/node_modules/bluebird/js/release/async.js:148:10)
at Immediate.Async.drainQueues [as _onImmediate] (/path/to/project/node_modules/bluebird/js/release/async.js:17:14)
at processImmediate [as _immediateCallback] (timers.js:383:17)