Question

How would I go about manually filtering a hash using my application’s parameter filter?

I imagine it’d go like this:

Rails.application.filter :password => 'pass1234'
  # => {:password => '[FILTERED]'}

EDIT (clarification): I’m aware that Rails filters the params hash when writing to the logs. What I want to do is apply that same filter to a different hash at my prerogative before writing it to the logs with something like Rails.logger.info. I’m calling a remote HTTP query as a part of my application (since most of the backend operates through a remote API), and I’m logging the URL and parameters passed. I want to have the logs but also ensure that none of the sensitive params show up there.

Answer 1

After a few minutes of shotgunning it, I figured out this was the way to do it:

filters = Rails.application.config.filter_parameters
f = ActionDispatch::Http::ParameterFilter.new filters
f.filter :password => 'haha' # => {:password=>"[FILTERED]"}