List of all table and column in ActiveRecord

active_record_all_table_and_column.rb

ActiveRecord::Base.connection.tables.each do |table_name|
  puts "\n" + table_name
  ActiveRecord::Base.connection.columns(table_name).each {|c| puts "- " + c.name + ": " + c.type.to_s + " " + c.limit.to_s}
end


User.reflect_on_all_associations.each { |a| puts "#{a.macro} => #{a.name}" }
# has_many => posts
# has_one => avatar
# has_one => posts_filter
# has_many => votes