Controller Callbacks
Controller Callbacks are methods that are run “before”, “after” or “around” a controller action.
before_action
class PostsController < ApplicationController
before_action :set_post, only: [:show, :edit, :update, :delete]
private
def set_post
@post = Post.find(params[:id])
end
end
after_action
class PostsController < ApplicationController
after_action :format_post, only: [:show]
private
def format_post
@post.title.upcase
end
end
around_action
class PostsController < ApplicationController
around_action :benchmark
private
def benchmark
t1 = Time.now
yield
seconds = Time.now - t1
puts "Action took #{seconds}s"
end
end
skip_before_action
class ApplicationController < Jets::Controller::Base
before_action :authenticate_user_session
# ...
class PublicDocumentsController < ApplicationController
# skip the authenticate_user_session for all the methods in the controller
skip_before_action :authenticate_user_session
# ...
class PostsController < ApplicationController
# skip the authenticate_user_session only for the index method in the controller
skip_before_action :authenticate_user_session, only: [:index]
Supported Callbacks
These callbacks are supported:
after_action
append_after_action
append_around_action
append_before_action
around_action
before_action
prepend_after_action
prepend_around_action
prepend_before_action
skip_after_action
skip_around_action
skip_before_action
Jets Controller Callbacks are based on Rails Controller Callbacks. So the Rails docs are are useful: