When your app is using Paranoia, calling destroy on an ActiveRecord object doesn't actually destroy the database record, but just hides it.

Wouldn't it be awesome if ActiveRecord didn't make you think about eager loading and it just did the "right" thing by default? With Goldiloader it can!

When displaying a count of records, this will generate extra SQL Queries. Learn how to reduce the number of SQL queries called with counter caching the number of associated records.

Store multiple attributes and values using a text column. Not for everyday use, but has situations where it can save on the number of columns and/or models needed to accomplish a task.

With strong params replacing attr_accessible, a difficulty has arisen with referencing to the structure of your models. With annotate, we can generate the structure of our models in the comments of our models.