Ruby Graph Database libraries like activegraph, rgl, pacer and others provide a simple way to build a graph database. These libraries allow you to store graphs in Ruby objects without having to write any code for the storage or query layer. You can even use Ruby to query your graph data!
ActiveGraph is an open source Ruby library for working with graphs. It provides functionality for reading from and writing to CSV files, but doesn't have any built-in graph storage capabilities. RGL is another open source library for storing graph data in CSV files. It's similar to ActiveGraph in that it doesn't provide any built-in graph storage capabilities, but it does include methods for creating and querying graphs over CSV files. Pacer is a Ruby gem that allows you to easily store and query graphs in PostgreSQL by using SQL queries such as "SELECT * FROM users." Developers tend to use some of the following open source Ruby Graph Database libraries: