Rails 6 local server booting : RAILS_ENV=development environment is not defined

Question

I just created a new Rails 6 app. Everything went fine until I tried to launch the local server with rails s, and got this error message :

RAILS_ENV=development environment is not defined in config/webpacker.yml, falling back to production environment
Exiting

and

Webpacker configuration file not found /Users/remy/dev/voter/config/webpacker.yml. Please run rails webpacker:install Error: No such file or directory @ rb_sysopen - /Users/remy/dev/voter/config/webpacker.yml (RuntimeError)

But when I run rails webpacker:install I still have the error.

score 13 · Accepted Answer · answered Aug 30 '19 at 11:58

13

That error usually hints at an unmet Yarn dependency. Try installing or updating Yarn before running rails webpacker:install.

Here are the Yarn Docs for quick reference just in case.

answered Aug 30 '19 at 11:58

dolagun

156
1
4

Thats worked, I was missing dependencies and `yarn install` did the trick. – Ruff9 Aug 30 '19 at 14:58
Can you tell me what happens when we run this command? This is not found in rails documentation getting started. – Krishnadas PC Sep 19 '19 at 05:45
I had to install node first – knig_T Oct 15 '19 at 00:03

Rails 6 local server booting : RAILS_ENV=development environment is not defined

1 Answers1