sequelize: Documentation error: Sequelize option "dialect" is not optional?

What you are doing?

Using Sequelize in v4.3.2. I didn’t provide a dialect in the Options object for the constructor. That results in

node_modules/sequelize/lib/sequelize.js:169
      throw new Error('Dialect needs to be explicitly supplied as of v4.0.0');
      ^

What do you expect to happen?

According to the docs the dialect is optional and should default to 'mysql'.

What is actually happening?

Error as listed above.

Dialect: mysql Database version: 5.5 Sequelize version: 4.3.2

About this issue

Original URL
State: closed
Created 7 years ago
Comments: 17 (2 by maintainers)

Most upvoted comments

I’ve been having issues with it as well. In my config file I have

    "dialect": "mysql"

I’m still getting the “Error: Dialect needs to be explicitly supplied as of v4.0.0”. Very frustrating and can’t figure out why Sequelize doesn’t see my specifying the dialect.

+27

dancitron on Oct 8, 2017

I also faced the same issue.

+15

sagarora77 on Jul 16, 2017

Having this same issue " throw new Error(‘Dialect needs to be explicitly supplied as of v4.0.0’)" and dialect has been specified in my config.Json file…

Mr-emeka on Jun 11, 2018

It worked for me on windows by adding following in config.json

“NODE_ENV”:“development”, “dialect”:“mysql”

hyedhiraj on Jan 6, 2019

var connection = new Sequelize(‘database,’ user’, ‘password’,{ host: ‘localhost’, dialect: ‘mysql’ });

ahiezerrivas on Aug 24, 2017

I’m getting this as well. I just started using sequelize. I’m not sure what’s wrong. I tried setting my files up like this https://gist.github.com/andrewmunro/030f0bf62453239c495b0347c8cd1247#file-how-to-use-md.

thebeachdev on Jul 20, 2017

face the same issue and fixed it by setting the NODE_ENV to the specified environment in the config.json

yassin-mokni on Sep 9, 2017