A whole bunch of extensions the ActiveRecord PostgreSQL adapter.

Amazon Redshift adapter for ActiveRecord 7+

An Active Record extension for Multitenancy with PostgreSQL Row Level Security

Create ActiveRecord relations from UNIONs

Automatic database view creation for ActiveRecord

An implementation of repository pattern that can connect with any ORM

ActiveRecord extension for sorted adjacency lists support

This is a ruby gem that provides drop in replacement for acts_as_tree but makes use of SQL recursive statement. Be sure to have a DBMS that supports recursive queries when using this gem (e.g. PostgreSQL or SQLite).

ActiveRecord::Base.connection.after_transaction_commit { ... }

Annotate your models and keep your comments about fields.

Easing the creation of DTOs from your ActiveRecord models.

Provides an easy way to do something that is possible in Rails but still a bit close to the metal using store_accessor: create typecasted, persistent attributes that are not columns in the database but stored in the JSON "data" column. Also supports infinite nesting of embedded models.

ArelToolkit contains parsing, querying, modifying, optimisations, extensions and more for Arel.

Add MySQL geometry type to Active Record.

ActiveRecord Object Instrumenter: Instrument the creation of ActiveRecord objects

ar_pg_array includes support of PostgreSQL's int[], float[], text[], timestamptz[] etc. into ActiveRecord. You could define migrations for array columns, query on array columns.

These RSpec matchers allow guarding against N+1 queries by specifying exactly how many queries you expect each of your ActiveRecord models to perform.

Add support for PostgreSQL's SEQUENCE on ActiveRecord migrations

Associate multiple models together and make them behave as one.

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