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Quick Start » Connecting to existing database

This article assumes:

  • You have a database called my_db
  • There's a table called users with name column
  • You have the rom and rom-sql gems installed

To connect to your database and define a repository for users table, simply do:

require "rom"

rom = ROM.container(:sql, 'postgres://localhost/my_db', username: 'user', password: 'secret') do |config|
  config.relation(:users) do
    schema(infer: true)
    auto_struct true

users = rom.relations[:users]

users.changeset(:create, name: "Jane").commit

jane = users.where(name: "Jane").one

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