Ruby on Rails/ActiveRecord

ActiveRecord - The Model

 * /Naming/
 * See the way the models are named and what names to avoid


 * /Migrations/
 * How to get your data inside the database in a convenient way


 * /Associations/
 * Connect different models together


 * /Callbacks/
 * Read about how to manipulate your data at certain states of their existence


 * /Validations/
 * Check your input for their correctness


 * /Attributes/
 * How to look up different criteria without writing SQL


 * /Aggregations/
 * Write advanced aggregations inside your model


 * /Calculations/
 * Do basic mathematical calculations with your data


 * /acts_as/
 * Extend functionality with acts_as


 * /Timestamps/
 * /Connection adapters/