joncode

git stash 
	stash the last commit

git stash apply
	applies the last stash

git stash apply stash@{2}
	if you want one of the older ones

git stash drop with the name of the stash to remove:

joncode

git reset --hard 10123974102937840192374
     this moves the pointer to that commit.  This is what you want most of the time

git reset --soft 0238947293842937429384723
     this moves the pointer and via an index that you commit , very strange. 

joncode

go to heroku.com the site you are upgrading

1. add the new database - we chose 'CRANE' for 50$ / month

    heroku addons:add heroku-postgresql:crane        
   

2. in console

    heroku pg:wait --remote staging
   

joncode

module RetryOnTermJob
  def around_perform_retry_on_term(*args)
    begin
      yield *args
    rescue Exception => e
      if e.message =~ /SIGTERM/
        # when a worker `extend`s this class, self is that worker class
        Resque.enqueue(self, *args)
      else 
        raise 

joncode

c = ActiveRecord::Base.connection
c.tables.collect do |t|  
  columns = c.columns(t).collect(&:name).select {|x| x.ends_with?("_id" || x.ends_with("_type"))}
  indexed_columns = c.indexes(t).collect(&:columns).flatten.uniq
  unindexed = columns - indexed_columns
  unless unindexed.empty?
    puts "#{t}: #{unindexed.join(", ")}"
  end
end

joncode

http://www.rubydoc.info/gems/resque/frames

Resque.info
   {:pending=>0, :processed=>157473, :queues=>7, :workers=>21, :working=>0, :failed=>0, :servers=>["redis://barb.redistogo.com:9497/0"], :environment=>"production"}
Resque.workers
   returns an array of workers available
Resque.workers.each {|w| w.prune_dead_workers }
   kills dead workers

w = Resque.workers[0]

joncode

heroku = PlatformAPI.connect_oauth('f04asdfbd-18e5-4486-b4df-873asdfa')

heroku.app.info('dbappdev')
heroku.formation.list('dbappdev')

heroku.dyno.list('dbappdev')
heroku.dyno.info('dbappdev', dyno_id)

joncode

run the redis server
1. in the command line
	redis-server
2. start the rails server
	rs
3. start the resque rake task
	QUEUE=* rake resque:work

joncode

ApplicationController.included_modules

ApplicationController.ancestors - ApplicationController.included_modules

HelpsController.action(:index) #=> returns a proc rack application - plus the line of the source code metal.rb:230 #Proc:0x007fcfad287a38@/Users/jongutwillig/.rvm/gems/ruby-2.1.1@global/gems/actionpack-4.1.0/lib/action_controller/metal.rb:230 HelpsController.method(:action).source_location #=> where it is defined ["/Users/jongutwillig/.rvm/gems/ruby-2.1.1@global/gems/actionpack-4.1.0/lib/action_controller/metal.rb", 229]

There are TWO MIDDLEWARE STACKS ! - one for the app - one for controller lookup

joncode

http://stackoverflow.com/questions/7203515/how-to-locate-a-deleted-file-in-the-commit-history/21871377#21871377