There are lots of changes, so I just picked up some here.
ActiveRecord
belongs_to required by default.
# config/initializers/new_framework_defaults.rb
Rails.application.config.active_record.belongs_to_required_by_default = true
# app/models/post.rb
- belongs_to :user, required: true
+ belongs_to :user
But you need to care about it because of other gems. It sometimes doesn't work if one of gems is using a hook like ActiveRecord::Base.extend, ActiveRecord::Base.send :include etc intead of ActiveSupport.on_load(:active_record).
#rails/rails#23589
ActionMailer
Change your mailers to inherit from your new ApplicationMailer.
# app/mailers/application_mailer.rb
class ApplicationMailer < ActionMailer::Base
default from: '[email protected]'
layout 'mailer' #=> app/views/layouts/mailer.html.erb or mailer.txt.erb
end
Default values in initializers
Setup the default locale, generators etc from an initializer instead of config/application.rb
# config/initializers/locale.rb
Rails.application.config.i18n.available_locales = [:en, :ja]
Rails.application.config.i18n.default_locale = :en
# config/initializers/generators.rb
Rails.application.config.generators do |g|
g.stylesheet_engine :sass
g.template_engine :slim
...
end
But you shouldn't assign some values such as time_zone in an initializer. Because Rails.application.config.time_zone will work, but Time.zone won't. Time.zone_default is assgined before the initializer.
In general, configuration specific to the application object needs to go either in config/application.rb or in config/environments/#{Rails.env}.rb, you can't just assign to an arbitrary config point in config/initializers and expect it to work.
https://github.com/rails/rails/issues/24748#issuecomment-216317145
# config/application.rb
module Foo
class Application < Rails::Application
config.time_zone = 'UTC'
config.paths.add 'lib', eager_load: true
end
end
Quiet assets
You don't need quiet_assets gem finally! Logger output is suppressed using Rails.application.config.assets.prefix path to match.
rails/rails#25351, rails/sprockets-rails#355
# config/environments/development.rb
# Suppress logger output for asset requests.
config.assets.quiet = true
Post a comment on GitHub