ActiveRecord is great, but could be better. Here are some tweaks for it.

Adds a symbol attribute type to activerecord

Add ULID support to ActiveRecord

Extend ActiveRecord uniqueness validations with via: :db option.

Batch updating for ActiveRecord models

Update ActiveRecord counter and update instance value

Introduces update_in_bulk(), a method to update many records in a table with different values in a single SQL statement.

Support MySQL's INSERT ... ON DUPLICATE KEY UPDATE in ActiveRecord

Allows database connections to be defined as URLS, then converted to hash for use in ActiveRecord

activerecord-utils - utilities (e.g. random, alias_attr, etc.) for activerecord

active_record_uuid is a nice gem that add uuid supports to your activerecord models (MySQL). It allows you to store uuid in various formats: binary (16 bytes), base64 (24 bytes), hexdigest (32 bytes), or string (36 bytes), and query back with uuid string.

UUID extension for ActiveRecord

Installs blah blah blah

Order for UUID

Extends activerecord validations with helpers

ActiveRecord adapter for Vertica databaes

SQL views with ActiveRecord

Helpers for using live and materialized views in ActiveRecord

Simple DSL to control callback attribute changed in ActiveRecord model

A simple mixin to ActiveRecord::Base that allows use of OR arel relations.