Ruby for Newbies: Working with DataMapper | Envato Tuts+

Step 0: Introducing DataMapper DataMapper is an ORM: an Object-Relational Mapping. Basically, it’s a library that lets you work with your database from object-oriented code. There’s absolutely no SQL in this tutorial at all. However, an ORM uses a regular database under the covers; we’ll be using sqlite3 today, but you could just use a different adapter to work with a mysql, postgresql or other da