Rails gem to allow models to save auto calculated fields

has_changelogs tracks changes on a model and it's associations for applications that need to have change history. This is not about versioning your model, and the version is however, 0.1.0, so use at your own perril. The changelogs contain a JSON representation of the changes.

Automatically calculate checksums and signatures from the values of your ActiveRecord or POROs classes' attributes/methods

Allows you to include and organize configuration options for each record in a model without the need of complex joins to settings tables or constantly adding random boolean and string columns

Simple wrapper for adding content via a polymorphic join for any active record. Version 0.0.4.

ActiveRecord counter_cache has been reborn, with ability to specify conditions.

Uses a vertical schema to add custom fields.

Adds ability to put dynamic fields into active record models

The email equivalent of has_secure_password for ActiveRecord.

Embedded data objects for ActiveRecord models

Encrypted attributes for Rails models.

Based on acts_as_list, but allows nil elements to be not a part of the featuerd list.

This gem is based on homonym plugin from fnando https://github.com/fnando/has_friends

Dead simple Gravatar URL generator

Make it easy to use handles (callsigns/monikers/usernames) in URLs, even if they might be blank. Provides sensible validations and a find_by_id_or_handle method.

Use an ActiveRecord Hash column as backend for dynamic attributes. Dynamic attributes will act like table columns. Just include the HashAttributes module in your ActiveRecord::Base class.

Provides `hashed` method to ActiveRecord dataset, that return hash where keys is value of some attribute of object (default – primary key of used table).

Hash attributes using SHA512 (or your custom hash strategy). Works with and without ActiveRecord.

HashidsUri turns your sequentially generated id in the URL into a Hashid see **hashids.org**.

Tree behavior for ActiveRecord models and Mongoid documents.