title: Ruby on Rails: A way to save currency into a column within a database-table
body: <p>I have a database-table cost with the columns amount and currency. I search for a solution to save a currency into this column. </p>
  
  <p>What do you suggest: Which data type for the column currency and what values should I save there (iso-code, currency symbol ...)? Or maybe there is already a data type Currency in ruby like in java?</p>