title: Writing inventory systems using Ruby on Rails
body: <p>Is there anything (warnings, advices) that I should know if I want to develop an <strong>inventory management system using Ruby on Rails</strong>. The biggest problem that I could think of is on how to do long calculations on the stocks. The other one would be on how to do cachings on stock counts. BTW, I'll be using MySQL as the database. Thanks in advance.</p>