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Contents
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])}"
message << " within #{from_rails_root(event.payload[:layout])}" if event.payload[:layout]
message << " (#{event.duration.round(1)}ms)"
end
end
alias :render_partial :render_template
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
protected
EMPTY = ''
def from_rails_root(string)
string = string.sub(rails_root, EMPTY)
string.sub!(VIEWS_PATTERN, EMPTY)
string
end
def rails_root
@root ||= "#{Rails.root}/"
end
def render_count(payload)
if payload[:cache_hits]
"[#{payload[:cache_hits]} / #{payload[:count]} cache hits]"
else
"[#{payload[:count]} times]"
end
end
private
def log_rendering_start(payload)
info do
message = " Rendering #{from_rails_root(payload[:identifier])}"
message << " within #{from_rails_root(payload[:layout])}" if payload[:layout]
message
end
end
end
end
ActionView::LogSubscriber.attach_to :action_view
Version data entries
31 entries across 31 versions & 4 rubygems