active record

Data is a great thing but the wrong data can be very very bad. Luckily, if you're a Ruby on Rails programmer you have a nice API of ActiveRecord validation helpers at yo...

Callbacks are methods that get called at certain moments of an object's life cycle. We can use callbacks as a means to manipulate objects further with built-in functiona...

ActiveRecord plays a pivotal role in interacting with databases. One of the key concepts in database design is normalization, a technique for organizing and formatting d...