Disabling Rails logging from script/runner

Question

Is there some way to disable all logging (whether from ActiveRecord, other parts of Rails, plugins, etc.) from a script running via script/runner? I've got a long data-loading script running, and it's generating an absurd amount of useless logging information. I'm not trying to change script/runner's environment (e.g., production, development, etc.)- the script currently needs to run in the "development" environment, and it's doing so without issue at the moment.

All I want to do is suppress all logging for the duration of the script's lifetime. From reading the docs, it looks like if I can get a handle to its Rails::Configuration I should be either able to set log_level to something other than :debug or set its logger to nil. Am I on the right track? If so, how do I get access to its Rails::Configuration object?

Answer 1

The settings are in your config/environments/*.rb files, which override the default for environment.rb. When it does "Rails::Initializer.run do |config|" it's running with the config object. I'm fairly sure you can change either to suite your needs, but I'm not sure how you'd pass it a flag saying it was a script/runner script currently executing.

(I know you said your not interested in changing the environment, but I thought I'd throw out there that you could create a new env for a dataload script that has most of the same settings but no logging fairly easily)

Answer 2

There are a couple of ways I can think of.

1) Set the log level so high that nothing will get logged:

ActiveRecord::Base.logger.level = Logger::Severity::UNKNOWN

See Logger::Severity for more about that. UNKNOWN is the highest.

"level" is just a number, so it can be set to Logger::Severity::UNKNOWN + 1 if you feel paranoid. :)

2) Send the output to /dev/null.

ActiveRecord::Base.logger = Logger.new('/dev/null')

(I'm assuming that there is just one instance of Logger that is used by Rails, and that it's the one you get via ActiveRecord::Base.logger. If there are more of them you'd have to find them and fiddle with them also.)

If you don't like these you might find something else by reading the Logger docs.