Logs are outputed into the Rails console

[martinos]

Steps to reproduce

In the console

Rails.logger.info("test")

Expected behavior

I think that the Rails console should not output logs to the console (as it was prior to Rails 5), or at least give a way to disable this behavior.

Actual behavior

test will be outputted the console.

This causes me a lot of headache because when I call some methods on objects that are logging, my console gets flooded of logs.

System configuration

Rails 5.2.2 and Rails 6.0.1

Ruby version: 2.6.3

[Edouard-chin]

Rails doesn't output log on STDOUT in development and in test. It only does in production when the RAILS_LOG_TO_STDOUT environment variable is set, this is intended

[martinos]

@Edouard-chin, I don't understand what you are saying. I logged in a development console on a brand new rails app and here's what I've got:

~/tmp/app_rails -$ rails c
Running via Spring preloader in process 98447
Loading development environment (Rails 6.0.2.1)
irb(main):001:0> Rails.logger.info("coco")
coco
=> true
irb(main):002:0> ENV["RAILS_LOG_TO_STDOUT"]
=> nil
irb(main):003:0>

The RAILS_LOG_TO_STDOUT flag is not set on my production machine and I still get the log outputted to stderr.

[Edouard-chin]

Weird, I just created a brand new app and I don't have the same result

❯ bin/rails c
Running via Spring preloader in process 1668
Loading development environment (Rails 6.0.2.1)
irb(main):001:0> Rails.logger.info('hello')
=> true

Can you share the Github link of your test app ?

[martinos]

Here is my app: https://github.com/martinos/app_rails

[Edouard-chin]

Ah ok yeah sorry, my app didn't have ActiveRecord.

ActiveRecord broadcast logs to STDERR

rails/activerecord/lib/active_record/railtie.rb

Line 61 in 40c7c5e

console = ActiveSupport::Logger.new(STDERR)

when inside the Rails console

[martinos]

I've found a hack around that:

ActiveRecord::Railtie.instance_variable_set(:@load_console, [])

See my answer of my own question on StackOverflow: https://stackoverflow.com/questions/59848347/disable-log-output-to-the-rails-console

But I feel that forcing people to have logs shown in their console is a bit extreme. In my case it was really problematic.

[rails-bot]

This issue has been automatically marked as stale because it has not been commented on for at least three months.
The resources of the Rails team are limited, and so we are asking for your help.
If you can still reproduce this error on the 6-0-stable branch or on master, please reply with all of the information you have about it in order to keep the issue open.
Thank you for all your contributions.