Jackson Pires jacksonpires

Arel Cheatsheet on Steroids

A (more) complete cheatsheet for Arel, including NamedFunction functions, raw SQL and window functions.

posts = Arel::Table.new(:posts)
posts = Post.arel_table # ActiveRecord

People

This PR aims to do something (detailed description).

	Rich Hickey
	https://confreaks.tv/videos/railsconf2012-keynote-simplicity-matters
	https://confreaks.tv/videos/jaxconf2012-keynote-the-value-of-values

	Dave Thomas
	https://confreaks.tv/videos/elixirconf2014-opening-keynote-think-different
	https://confreaks.tv/videos/lonestarruby2013-elixir-power-of-erlang-joy-of-ruby

	Robert Martin
	https://confreaks.tv/videos/rubymidwest2011-keynote-architecture-the-lost-years

-# In most cases, a single Rails app will be attached to a single repo
-# As of Rails 5.1, initializing a new project will also automatically initialize Git
-# This is perfect in most circumstances, but at App Academy, students have homework and
-# project repos that contain multiple rails apps inside them
-# To account for this without pushing the submodules, students need to remove the .git
-# directory before adding and commiting the new project, but most do not, resulting in

	module Arel::Predications
	def has_key(right)
	Arel::Nodes::HasKey.new(self, quoted_node(right))
	end
	end

	class Arel::Nodes::HasKey < Arel::Nodes::Binary
	def operator; :"?" end
	end

	module Arel::Predications
	def any(right)
	Arel::Nodes::Any.new(self, quoted_node(right))
	end
	end

	class Arel::Nodes::Any < Arel::Nodes::Binary
	def operator
	:'ANY'
	end