Rails Filter

Posted by On 11月 06, 2014 0 Comment

Filter

Action method before, after both
before around after

before / after

Example



class ExampleController < ApplicationController
  before_action :start_logger
  after_action :end_logger
  
  def index
  end
  
  private
  def start_logger
    logger.debug('[Start]' + Time.now.to_s)
  end
  
  def end_logger
    logger.debug('[Finish]' + Time.now.to_s)
  end
end
[/ruby]
Use before_action as before filter,

and after_action as around filter.


around




class ExampleController < ApplicationController
  around_action :around_logger
  
  def index
  end
  
  private 
  def around_logger
     # Before
	 logger.debug('[Start]' + Time.now.to_s)
	 yield  # Execute Action
	 # After
	 logger.debug('[Finish]' + Time.now.to_s)
  end
  
end
[/ruby]




Filter range


only, except




class ExampleController < ApplicationController
  before_action :start_logger, only: [:index, :index2]
  after_action :end_logger, except: :index
end
[/ruby]




Skip inherited filter


Skip inherited filter




class ExampleExController < ExampleController
  skip_before_action :my_log  # my_log belongs parent controller
  skip_after_action :my_after_log, only: :index
end
[/ruby]




Filter Example




class ExampleController < ApplicationController
    
	before_action :auth, only: :index
	
	private
	def auth
	  # username / password
	  name = 'username'
	  passwd = 'xxxxxxxxxx'
	  
	  authenticate_or_request_with_http_basic('Application') do |n, p|
	  n == name && Digest::SHA1.hsxdigest(p) == passwd
	end
end
[/ruby]









  					

 			 
	
			 
					   					

										

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