diff options
Diffstat (limited to 'actionview/lib/action_view/log_subscriber.rb')
-rw-r--r-- | actionview/lib/action_view/log_subscriber.rb | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/actionview/lib/action_view/log_subscriber.rb b/actionview/lib/action_view/log_subscriber.rb new file mode 100644 index 0000000000..d4ac77e10f --- /dev/null +++ b/actionview/lib/action_view/log_subscriber.rb @@ -0,0 +1,96 @@ +# frozen_string_literal: true + +require "active_support/log_subscriber" + +module ActionView + # = Action View Log Subscriber + # + # Provides functionality so that Rails can output logs from Action View. + class LogSubscriber < ActiveSupport::LogSubscriber + VIEWS_PATTERN = /^app\/views\// + + def initialize + @root = nil + super + end + + def render_template(event) + info do + message = " Rendered #{from_rails_root(event.payload[:identifier])}".dup + message << " within #{from_rails_root(event.payload[:layout])}" if event.payload[:layout] + message << " (#{event.duration.round(1)}ms)" + end + end + + def render_partial(event) + info do + message = " Rendered #{from_rails_root(event.payload[:identifier])}".dup + message << " within #{from_rails_root(event.payload[:layout])}" if event.payload[:layout] + message << " (#{event.duration.round(1)}ms)" + message << " #{cache_message(event.payload)}" unless event.payload[:cache_hit].nil? + message + end + end + + def render_collection(event) + identifier = event.payload[:identifier] || "templates" + + info do + " Rendered collection of #{from_rails_root(identifier)}" \ + " #{render_count(event.payload)} (#{event.duration.round(1)}ms)" + end + end + + def start(name, id, payload) + if name == "render_template.action_view" + log_rendering_start(payload) + end + + super + end + + def logger + ActionView::Base.logger + end + + private + + EMPTY = "" + def from_rails_root(string) # :doc: + string = string.sub(rails_root, EMPTY) + string.sub!(VIEWS_PATTERN, EMPTY) + string + end + + def rails_root # :doc: + @root ||= "#{Rails.root}/" + end + + def render_count(payload) # :doc: + if payload[:cache_hits] + "[#{payload[:cache_hits]} / #{payload[:count]} cache hits]" + else + "[#{payload[:count]} times]" + end + end + + def cache_message(payload) # :doc: + case payload[:cache_hit] + when :hit + "[cache hit]" + when :miss + "[cache miss]" + end + end + + def log_rendering_start(payload) + info do + message = " Rendering #{from_rails_root(payload[:identifier])}".dup + message << " within #{from_rails_root(payload[:layout])}" if payload[:layout] + message + end + end + end +end + +ActionView::LogSubscriber.attach_to :action_view |