Makes use of SQLite3 in-memory database possible for your Rails tests by preloading the schema.

A Rails plugin for merging Active Record models

Convert mermaid ER diagram to a migration file

Messiah enables using Ruby testing tools for integration testing with platforms that support CGI. Notably, PHP.

Mi is a generator of migration file instead of `rails generate migration`.

MiniTest matchers for ActiveModel::Validations

A collection of assertions for use with minitest and activerecord. Simplifies testing associations and validations by introspecting associations and validations for you models.

ActiveRecord 2.3 compatible gem "allowing you to hide and restore records without actually deleting them." Yes, like acts_as_paranoid, only with less code and less complexity.

A Ruby mailing list library designed to be integrated into other applications.

mmunicode_rails lets you convert you rails app input data to Myanmar Unicode regardless of which fonts the users used.

Iterate through large ActiveRecord datasets

Easy manipulation of sets of ActiveRecord models

PaperTrail DropIn replacement to store version in MongoDB

Add table-level database locking to ActiveRecord

ActiveRecord plugin designed to allow simple multiple table inheritance.

Typically SQL is not a great place to store a counter that is incremented often. For instance if you're counting the number of visits to a page by incrementing a SQL column and that page gets popular then there's a good chance that the SQL counter will become a benchmark. This is because doing an UPDATE on the row in question locks the row during the course of the UPDATE. So for many concurrent UPDATES there will be lots of lock contention. This gem helps with that.

A collection of tools for multitenant Ruby/Rails apps

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Plugins for Muzang IRC bot

DB constraints in migrations similiar to ActiveRecord validations. Core classes