Rails Model's table info generator (indexes included)

AR Model schema printer

def table_info(model)
  puts "# Table name: #{model.table_name}", "#", "#   Columns:"
 
  cols = model.columns.inject([]) {|arr, e| arr << [e.name || '-', e.type || '-', e.sql_type || '-', e.limit || '-', e.default || '-'].map(&:to_s)}
  col_sizes = cols.inject([]) {|arr, c| arr << c.map {|e| e.size }}
  max_sizes = 4.times.inject([]) {|arr, i| arr << col_sizes.max_by {|e| e[i] }[i] }
  cols.each { |c| puts "#     #{c[0].ljust(max_sizes[0] + 2)}:#{c[1].ljust(max_sizes[1] + 3)}#{c[2].ljust(max_sizes[2] + 2)}#{c[3].ljust(max_sizes[3] + 2)}#{c[4]}" }
 
  puts "#", "#   Indexes:"
  indexes  = ActiveRecord::Base.connection.indexes(model.table_name).map {|e| [e.name, "(#{e.columns.join(", ")})"]}
  max_size = indexes.map {|e| e.first.size}.max
  indexes.each { |c| puts "#     #{c[0].ljust(max_size + 2)}#{c[1]}" }
  puts "#"
end