How to show Rails ActiveRecord query time in Heroku pry rails console?

Question

When I run an ActiveRecord query in my local console, I am shown both how long the query took to run (in ms) and the raw SQL that was generated from my ActiveRecord code. For example:

$ rails c
Running via Spring preloader in process 92420
Loading development environment (Rails 6.1.3)
[1] pry(main)> TableName.count
   (26336.8ms)  SELECT COUNT(*) FROM "table_names"
=> 10005457

But when I run the same query in a Heroku rails console, I don't see the query time or SQL, just the result. Example:

$ heroku run rails c
Running rails c on ⬢ app-name... up, run.9115 (Free)
Loading production environment (Rails 6.1.3)
[1] pry(main)> TableName.count
=> 10005457

If it's relevant, I have gem 'pry-byebug' and gem 'pry-rails' installed via my Gemfile (not in the development group). I'm also using PostgreSQL as my database.

eux eux · Accepted Answer · 2021-03-12T02:11:19

Whether to display query time and SQL depends on Log Levels.

It displays when the log level is :debug or corresponding number 0.

You could check config.log_level in config/environments/production.rb.

If it's :debug, then it might be Heroku has changed log level somehow.

You could check the log level in Hereku console by Rails.logger.level.

And set log level to :debug by Rails.logger.level = :debug.

How to show Rails ActiveRecord query time in Heroku pry rails console?

1 Answers