List all models and their DB columns

list.rb

# Load models
Dir.foreach("app/models") { |f| require f if f =~ /rb$/ }

ActiveRecord::Base.descendants.each do |klass|
  next if klass == "Rack::OAuth2::Server::Issuer".safe_constantize or klass == "Rack::OAuth2::Server::ActiveRecord".safe_constantize
  begin
	  klass.columns.each_with_index {|c, i| printf "%-20s | %-19s | %-29s | %-10s\n", (i==0 ? klass.name : ''), c.name, c.sql_type, (c.null ? '' : 'not null') }
	rescue => e
	  puts "*"*10
		puts "Error getting columns for #{klass}: #{e}"
		puts "*"*10
	end
end