Loads all migrations

load_missed_migrations.rb

files = Dir.glob("db/migrate/*")
timestamps = files.collect{|f| f.split("/").last.split("_").first}
timestamps.count
migrations = ActiveRecord::Base.connection.execute("SELECT version FROM schema_migrations", as: :array).to_a.flatten
needs = timestamps - migrations
files_needs = files.select { |f| needs.include? f.split("/").last.split("_").first }
files_needs.sort.each do |f|
  begin
    require "#{Rails.root}/#{f}"
    f.split('/').last.split('_')[1..-1].join('_').split('.').first.camelize.constantize.new.up
  rescue => e
  end
end

sql = "INSERT INTO `schema_migrations` (`version`) VALUES #{needs.map{|n|"('#{n}')"}.join(',')} ON DUPLICATE KEY UPDATE `version`"
ActiveRecord::Base.connection.execute(sql) rescue nil