undefined method `to_sym' for nil:NilClass

[jaredmoody]

Trying out the quickstart guide and hitting an error when trying to build:

kuby -e production build
error: undefined method `to_sym' for nil:NilClass

I'm sure I've missed something, but I don't know how to get kuby to print a backtrace or otherwise find out what the issue is.

[camertron]

Hey @jaredmoody thanks for giving Kuby a spin! You can get a backtrace by prefixing the command with GLI_DEBUG=true. Can you try that and paste the output?

[jaredmoody]

Perfect, thanks!

Here's the relevant line from the backtrace:

/Users/jaredmoody/.asdf/installs/ruby/2.7.6/lib/ruby/gems/2.7.0/gems/kuby-core-0.18.0/lib/kuby/plugins/rails_app/database.rb:40:in `adapter_name': undefined method `to_sym' for nil:NilClass (NoMethodError)

My production section of database.yml doesn't have an adapter because it uses a DATABASE_URL env variable, which wasn't present. However, when I added it, still has the same error - I would guess rails does some parsing of the protocol if the adapter isn't explicitly present? Anyway I added an explicit adapter: postgresql and no error, but it informed me postgres isn't supported.

Now I'm a little bit at a loss as how to use Kuby when I don't want to manage my database with k8s though. Any tips here?

At least, maybe improved error handling around the database adapter config would be a nice improvement :)

[camertron]

Nice, thanks for the additional info! Yeah it sounds like there are some improvements to be made here, I'll look into it. Check out this area of the docs for instructions on how to manage the database yourself. Specifically you'll want to do this in your Kuby config:

Kuby.define('my-app') do
  environment(:production) do
    kubernetes do
      plugin :rails_app do
        manage_database false
      end
    end
  end
end