map activerecord models to tables depending on context

An ActiveRecord::LogSubscriber which records only mod sql.

ActiveRecord wrapper for money gem

A custom ActiveRecord serializer using MessagePack

MultiConditions is a simple ActiveRecord plugin for storing ActiveRecord query conditions and make complex queries painless.

Enable the query_cache for your abstract base class inherited from ActiveRecord::Base

Mutex that can be used to synchronise ruby processes via an ActiveRecord datababase connection. (Only Mysql is supported at the moment.)

If you are stuck with a MySQL database where the naming is, well, unrailslike, activerecord-mysql2-legacy-db-adapter offers a way to do the translation. It works at the driver level and doesn't require you ro change the structure of the database. Also there are no database views which sho...

Allow setting mysql driver flags in database.yml for Rails apps.

Adds column comment and index comment to migrations for ActiveRecord MySQL adapters

Dump the type information of a non-standard primary key.

MySQL REPL featured by ActiveRecord and Pry

An ActiveRecord extension for enabling SQL_CACHE and SQL_NO_CACHE in MySQL queries

ActiveRecord::MySQL::Strict adds validations to ActiveRecord models to make sure they do not trigger errors in MySQL strict mode.

Cleaner structure.sql for MySQL.

Improves the class reflection of relationships

Adds scopes to your models to perform nearest neighbor queries with PostGIS and PostgreSQL. Also provides rake tasks for generating migrations to create geospatial tables or add geospatial columns and indexes to your existing tables.

Check if nested attributes were destroyed during the last save

Adds :destroy_if option to accepts_nested_attributes_for, which is basically a stronger version of :reject_if that destroys existing records, too.

Monkey patch to index nested errors for ActiveRecord 4