NameError: `@' is not allowed as an instance variable name about authlogic

[fguillen]

I see the error is happening when there is a DB connection problem. Looks like Authlogic is expecting the connection to be properly configured and if not the case it fails with this cryptical error. It would be better if Authlogic confirms the connection is stable or at least failing with another more explanatory error message.

[la-ruby]

...I see the error is happening when there is a DB connection problem...

I saw this error and realized my server had no Postgres add-on provisioned at heroku.

jo-ytm-acpig $ heroku run rails c
 ›   Warning: heroku update available from 7.68.2 to 8.0.1.
Running rails c on ⬢ app... up, run.4985 (Basic)
Loading production environment (Rails 7.0.4)
irb(main):001:0> User.count
/app/vendor/bundle/ruby/3.0.0/bundler/gems/rails-5bebef36ade9/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb:87:in `rescue in new_client': connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: No such file or directory (ActiveRecord::ConnectionNotEstablished)
	Is the server running locally and accepting connections on that socket?
/app/vendor/bundle/ruby/3.0.0/gems/pg-1.4.4/lib/pg/connection.rb:754:in `connect_start': connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: No such file or directory (PG::ConnectionBad)
	Is the server running locally and accepting connections on that socket?
irb(main):002:0> exit

[sandrods]

Having the same problem here... not sure where to begin debuging.
Any news on that front?

[quevon24]

It definitely fails if there is no connection to the database or you are missing tables. You can verify it like @la-ruby did

[wakproductions]

I ran into this error using 6.4.3 and can confirm that it was a database issue. Took a while to pinpoint the exact problem, but I had Puma server started up and running as an Ubuntu service. The DB credentials were in the environment variables initialized from the user profile, but because Puma was running as a service it could not see the environment variables. I fixed it by moving the DB credentials environment variables to a .env file and loaded by the dotenv-rails gem.

This was tricky to figure out because running Rails Console loaded the environment variables from the user profile and I couldn't tell that they were missing in the Puma server until I added special lines in the app to have them output to the Rails log. It was then I noticed the DB credentials were missing in Puma.

The error message led me down the wrong path because by looking at the source code I couldn't find figure out where Authlogic makes a DB call related to its retrieval of :password_field as shown in the stack trace. So strange.