Embed in a String to clear all previous ANSI sequences.
Colors
ActiveSupport::LogSubscriber is an object set to consume ActiveSupport::Notifications with the sole purpose of logging them. The log subscriber dispatches notifications to a registered object based on its given namespace.
An example would be Active Record log subscriber responsible for logging queries:
1 2 3 4 5 6 7 | module ActiveRecord class LogSubscriber < ActiveSupport::LogSubscriber def sql(event) "#{event.payload[:name]} (#{event.duration}) #{event.payload[:sql]}" end endend |
And it's finally registered as:
1 | ActiveRecord::LogSubscriber.attach_to :active_record |
Since we need to know all instance methods before attaching the log
subscriber, the line above should be called after your
ActiveRecord::LogSubscriber definition.
After configured, whenever a “sql.active_record” notification is published, it will properly dispatch the event (ActiveSupport::Notifications::Event) to the sql method.
Log subscriber also has some helpers to deal with logging and automatically flushes all logs when the request finishes (via action_dispatch.callback notification) in a Rails environment.