rosa-build/config/environments/development.rb

# https://github.com/rails/rails/issues/2639#issuecomment-6591735
class DisableAssetsLogger
  def initialize(app)
    @app = app
    Rails.application.assets.logger = Logger.new('/dev/null')
  end

  def call(env)
    previous_level = Rails.logger.level
    Rails.logger.level = Logger::ERROR if env['PATH_INFO'].index("/assets/") == 0
    @app.call(env)
  ensure
    Rails.logger.level = previous_level
  end
end

Rosa::Application.configure do
  # Settings specified here will take precedence over those in config/application.rb

  # In the development environment your application's code is reloaded on
  # every request.  This slows down response time but is perfect for development
  # since you don't have to restart the webserver when you make code changes.
  config.cache_classes = false

  config.cache_store = :redis_store, 'redis://localhost:6379/0/cache', { expires_in: 10.minutes }

  # Log error messages when you accidentally call methods on nil.
  config.whiny_nils = true

  # Show full error reports and disable caching
  config.consider_all_requests_local       = true
  config.action_controller.perform_caching = false

  # Don't care if the mailer can't send
  config.action_mailer.raise_delivery_errors = false
  #config.action_mailer.raise_delivery_errors = true
  #config.action_mailer.perform_deliveries = true
  config.action_mailer.delivery_method = :smtp # :letter_opener
  config.action_mailer.smtp_settings = { host: "localhost", port: 1025 }
  config.action_mailer.default_url_options = { host: 'localhost:3000' }

  # Print deprecation notices to the Rails logger
  config.active_support.deprecation = :log
  #config.active_support.deprecation = false

  # Only use best-standards-support built into browsers
  config.action_dispatch.best_standards_support = :builtin

  # Do not compress assets
  config.assets.compress = false

  # Expands the lines which load the assets
  config.assets.debug = true

  # Raise exception on mass assignment protection for Active Record models
  config.active_record.mass_assignment_sanitizer = :strict

  # Log the query plan for queries taking more than this (works with SQLite, MySQL, and PostgreSQL)
  config.active_record.auto_explain_threshold_in_seconds = 0.5

  config.middleware.insert_before Rails::Rack::Logger, DisableAssetsLogger
end