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39d6f9e112
add lazy_load_hooks.rb, which allows us to declare code that should be run at some later time. For instance, this allows us to defer requiring ActiveRecord::Base at boot time purely to apply configuration. Instead, we register a hook that should apply configuration once ActiveRecord::Base is loaded. With these changes, brings down total boot time of a new app to 300ms in production and 400ms in dev. TODO: rename base_hook
95 lines
3.2 KiB
Ruby
95 lines
3.2 KiB
Ruby
require "active_record"
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require "rails"
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require "active_model/railtie"
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# For now, action_controller must always be present with
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# rails, so let's make sure that it gets required before
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# here. This is needed for correctly setting up the middleware.
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# In the future, this might become an optional require.
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require "action_controller/railtie"
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module ActiveRecord
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class Railtie < Rails::Railtie
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railtie_name :active_record
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config.generators.orm :active_record, :migration => true,
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:timestamps => true
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rake_tasks do
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load "active_record/railties/databases.rake"
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end
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# TODO If we require the wrong file, the error never comes up.
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require "active_record/railties/log_subscriber"
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log_subscriber ActiveRecord::Railties::LogSubscriber.new
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initializer "active_record.initialize_timezone" do
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ActiveRecord.base_hook do
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self.time_zone_aware_attributes = true
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self.default_timezone = :utc
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end
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end
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initializer "active_record.logger" do
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ActiveRecord.base_hook { self.logger ||= ::Rails.logger }
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end
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initializer "active_record.set_configs" do |app|
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ActiveRecord.base_hook do
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app.config.active_record.each do |k,v|
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send "#{k}=", v
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end
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end
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end
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# This sets the database configuration from Configuration#database_configuration
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# and then establishes the connection.
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initializer "active_record.initialize_database" do |app|
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ActiveRecord.base_hook do
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self.configurations = app.config.database_configuration
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establish_connection
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end
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end
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# Expose database runtime to controller for logging.
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initializer "active_record.log_runtime" do |app|
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require "active_record/railties/controller_runtime"
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ActionController.base_hook do
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include ActiveRecord::Railties::ControllerRuntime
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end
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end
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# Setup database middleware after initializers have run
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initializer "active_record.initialize_database_middleware", :after => "action_controller.set_configs" do |app|
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middleware = app.config.middleware
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if middleware.include?("ActiveRecord::SessionStore")
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middleware.insert_before "ActiveRecord::SessionStore", ActiveRecord::ConnectionAdapters::ConnectionManagement
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middleware.insert_before "ActiveRecord::SessionStore", ActiveRecord::QueryCache
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else
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middleware.use ActiveRecord::ConnectionAdapters::ConnectionManagement
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middleware.use ActiveRecord::QueryCache
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end
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end
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initializer "active_record.load_observers" do
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ActiveRecord.base_hook { instantiate_observers }
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ActiveRecord.base_hook do
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ActionDispatch::Callbacks.to_prepare(:activerecord_instantiate_observers) do
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ActiveRecord::Base.instantiate_observers
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end
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end
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end
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initializer "active_record.set_dispatch_hooks", :before => :set_clear_dependencies_hook do |app|
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ActiveRecord.base_hook do
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unless app.config.cache_classes
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ActionDispatch::Callbacks.after do
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ActiveRecord::Base.reset_subclasses
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ActiveRecord::Base.clear_reloadable_connections!
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end
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end
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end
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end
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end
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end
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