Creating afterUpdate hook using the mixin function causes TypeError

[curiousdannii]

db.Version.addHook( 'afterUpdate', 'update_CurrentVersion', update_CurrentVersion );
db.Version.afterUpdate( 'update_CurrentVersion', update_CurrentVersion );

The first runs correctly, the second causes this error:

Unhandled rejection TypeError: Cannot read property 'length' of undefined
    at /home/dannii/i7el/node_modules/sequelize/lib/hooks.js:125:27
From previous event:
    at Function.each (/home/dannii/i7el/node_modules/sequelize/lib/promise.js:21:17)
    at Hooks.runHooks (/home/dannii/i7el/node_modules/sequelize/lib/hooks.js:120:27)
    at self.sequelize.getQueryInterface.apply.then.tap.then.options.fields.forEach.result._previousDataValues.(anonymous function) (/home/dannii/i7el/node_modules/sequelize/lib/instance.js:672:31)
From previous event:
    at Promise.tap (/home/dannii/i7el/node_modules/sequelize/lib/promise.js:21:17)
    at null.<anonymous> (/home/dannii/i7el/node_modules/sequelize/lib/instance.js:669:10)
From previous event:
    at Promise.then (/home/dannii/i7el/node_modules/sequelize/lib/promise.js:21:17)
    at Instance.save (/home/dannii/i7el/node_modules/sequelize/lib/instance.js:558:6)
    at Object.<anonymous> (/home/dannii/i7el/web/controllers/extensions.js:175:16)
From previous event:
    at Promise.spread (/home/dannii/i7el/node_modules/sequelize/lib/promise.js:21:17)
    at create (/home/dannii/i7el/web/controllers/extensions.js:143:5)
    at Layer.handle [as handle_request] (/home/dannii/i7el/node_modules/express/lib/router/layer.js:82:5)
    at next (/home/dannii/i7el/node_modules/express/lib/router/route.js:110:13)
    at onFinish (/home/dannii/i7el/node_modules/multer/index.js:211:16)
    at Busboy.<anonymous> (/home/dannii/i7el/node_modules/multer/index.js:188:9)
    at Busboy.emit (events.js:117:20)
    at Busboy.emit (/home/dannii/i7el/node_modules/multer/node_modules/busboy/lib/main.js:31:35)
    at /home/dannii/i7el/node_modules/multer/node_modules/busboy/lib/types/multipart.js:52:13
    at process._tickCallback (node.js:448:13)

[ns3777k]

From what I see from sources and docs (3rd version), adding a hook like this is not supported.

db.Version.afterUpdate( 'update_CurrentVersion', update_CurrentVersion );

You can pass only callback argument thus it's not a bug. So a quick workaround in your case would be:

db.Version.addHook( 'afterUpdate', 'update_CurrentVersion', update_CurrentVersion );
db.Version.afterUpdate( update_CurrentVersion );

But I guess that would be a good feature to have so I'll implement this.

[curiousdannii]

@ns3777k Sorry for the false bug report! I mustn't have read the docs carefully enough and just assumed it was the correct usage.

[janmeier]

@curiousdannii The issue has been fixed , so you can pass a name now