Daru (Data Analysis in RUby) is a library for analysis, manipulation and visualization of data. Daru works seamlessly accross interpreters and leverages interpreter-specific optimizations whenever they are available. It is the default data storage gem for all the statsample gems (glm, timeseries...

A gem for easy access to attributes stored in a serialized data hash

Provides simple methods on an ActiveRecord model using an ActiveRecord concern to invalidate/save single_column caches.

Provide a strategy for injecting database seeds between feature tests, using the DBMS directly.

This gem will generate classes (by default ActiveRecord::Base descendants) from database introspection

Easy way to find spec which doesn't clear database after execution

Gem which provides simple database repository pattern for ActiveRecord with predefined basics methods.

Rollback to savepoint your database

Duplicate a databse with sanitization options using SQL comments

Provide an easy way to manage code ownership over a database schema.

Transforms the data of a database from an old schema to a new one.

A Google Spreadsheet/Excel -> YAML -> Ruby Migration Tool

Database subset generator

A simplified implementation of the data mapper pattern

By leveraging smart comments in your schema, you can easily use this data throughout your app and make better decisions when logging data, exposing data through endpoints, monitoring data sent elsewhere, or allowing other systems accessing your database to consume the classifications...

DataComposer provides helpers to elegantly compose native Ruby Data objects into ActiveRecord models, automating migrations and model-level definitions.

Complex documents can be challenging to author, and time-consuming to achieve high levels of internal consistency. This gem offers a Domain Specific Language to embed structured data in a markdown document and then render it into configurable tables. Note: See security implications below.

From within your tests, if you can't understand what's going on, maybe you need to dump your data to your development database and use it from there?

Database Import / Export Tool

A tool that helps you generate data into multiple databases