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

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

An ActiveRecord extension to build nested scopes through pre-defined associations

Normalize your ActiveRecord models' attributes

Adds NOT logic to ActiveRecord

Very simple implementation of tableless

Add support for a not_nill type to active record.

Create Null Objects for ActiveRecord models with automatic support for empty associations.

An adapter for ActiveRecord and AREL to support the NuoDB distributed database backend.

ODBC Data Adapter for ActiveRecord

Provides `ActiveRecord::Relation#one!`, a convenience method that asserts a relation contains exactly one record and returns it. If there are no records or more than one, an `ActiveRecord::NoRecordFound` or `ActiveRecord::MultipleRecordsFound` exception is raised, respectively.