Dawid Polchlopek rapsad

Proposal for Improving Mass Assignment

For a while, I have felt that the following is the correct way to improve the mass assignment problem without increasing the burden on new users. Now that the problem with the Rails default has been brought up again, it's a good time to revisit it.

Sign Allowed Fields

When creating a form with form_for, include a signed token including all of the fields that were created at form creation time. Only these fields are allowed.

To allow new known fields to be added via JS, we could add:

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

	=Navigating=
	visit('/projects')
	visit(post_comments_path(post))

	=Clicking links and buttons=
	click_link('id-of-link')
	click_link('Link Text')
	click_button('Save')
	click('Link Text') # Click either a link or a button
	click('Button Value')

	!!! 5
	%html
	%head
	%title= "Your Website"
	%meta{ :content => "", :name => "description" }
	%meta{ :content => "", :name => "author" }
	%meta{ :content => "3 days", :name => "revisit-after" }
	%link{ :href => "http://creativecommons.org/licenses/by/3.0/", :rel => "license", :title => "Creative Commons Attribution 3.0 Unported License" }
	%link{ :href => "/feed", :rel => "alternate", :title => "Atom", :type => "application/atom+xml" }
	%link{ :href => "/css/screen.css", :media => "screen", :rel => "stylesheet" }

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	# install and make run basic bootstrap date-picker functionality described here http://www.eyecon.ro/bootstrap-datepicker/

	# app/assets/javascript/datepicker.js.coffee
	$(document).on 'pageChanged', ->

	# datepicker for simple_form & Ransack
	$(".custom_datepicker_selector").datepicker().on 'changeDate', (en) ->
	correct_format = en.date.getFullYear() + '-' + ('0' + (en.date.getMonth() + 1)).slice(-2) + '-' + ('0' + en.date.getDate()).slice(-2) # date format yyyy-mm-dd
	$(this).parent().find("input[type=hidden]").val(correct_format)

	# SSL self signed localhost for rails start to finish, no red warnings.

	# 1) Create your private key (any password will do, we remove it below)

	$ openssl genrsa -des3 -out server.orig.key 2048


	# 2) Remove the password

	$ openssl rsa -in server.orig.key -out server.key

	RAILS_ENV=production rake db:setup
	# produces the error below.....hmmm.....it's a no-worky
	psql:/yourprojectpath/yourproject/db/structure.sql:29: ERROR: could not open extension control file "/usr/share/postgresql/9.1/extension/hstore.control": No such file or directory

	# hstore postgresql extension needs to be installed, so....
	sudo apt-get install postgresql-contrib

	# now your extension should be available to enable so log in with psql
	psql -d yourproject_production -U yourdbuser -W

	-- show running queries (pre 9.2)
	SELECT procpid, age(clock_timestamp(), query_start), usename, current_query
	FROM pg_stat_activity
	WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
	ORDER BY query_start desc;

	-- show running queries (9.2)
	SELECT pid, age(clock_timestamp(), query_start), usename, query
	FROM pg_stat_activity
	WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'