ProGM

Arel Cheatsheet on Steroids

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

Tables

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

Table alias

JustSnow

module ProgressBar
  class << self
    def progress_bar(items_count, current_item_index, prefix)
      @@start_time = Time.now if current_item_index == 0

      time     = Time.now - @@start_time
      progress = current_item_index.next.to_f / items_count.to_f * 100
      bar      = "▓" * ( 50 * (progress / 100 ) ).floor
      minutes  = ((time / progress) * (100 - progress) / 60).round
      left_str = "#{minutes} minutes left   "

stevehodgkiss

class NativeColumnStore < ActiveRecord::SessionStore::Session
  class << self
    attr_reader :native_columns
    def native_columns=(columns)
      @native_columns = columns.map(&:to_s)
    end
    @native_columns = []
  end
 
  def data