Filtering asset requests from the development log using Rails 3.2

development.rb

# Add the following configuration to your config/environments/development.rb file
#
# This will set the Rails to log to STDOUT (insetad of log/development.log) as well
# as tag all assets request log lines with [assets]
#
# You can then pipe it into grep to filter out the asset lines
#
#   tail -f log/development.rb | grep -v '\[assets\]'
#
# If you log to STDOUT rather than log/development.rb then you can:
#
#   rails s | grep -v '\[assets\]'
# 
# or:
#
#   foreman start | grep -v '\[assets\]'

SomeApp::Application.configure do

  # Tag assets requests log lines with [assets]
  config.log_tags = [
    -> request { :assets if request.path.starts_with?(config.assets.prefix) },
    -> request { nil }
  ]

  # If you want to log to STDOUT rather than log files
  # config.logger = ActiveSupport::TaggedLogging.new(Logger.new(STDOUT))
  
end

I tend to use: https://github.com/evrone/quiet_assets since most of the time I don't actually need to see asset requests and if I'm debugging something I can just flick them on.

Still a really cool trick!