Migrations

.gitignore

@@ -0,0 +1 @@
+alphadex.db

Gemfile

@@ -3,6 +3,7 @@
 source "https://rubygems.org"
 
 gem "sequel"
+gem "sqlite3"
 
 group :dev do
   gem "minitest"

Gemfile.lock

@@ -6,6 +6,7 @@ GEM
     rake (13.0.6)
     sequel (5.73.0)
       bigdecimal
+    sqlite3 (1.6.8-arm64-darwin)
 
 PLATFORMS
   arm64-darwin-22
@@ -14,6 +15,7 @@ DEPENDENCIES
   minitest
   rake
   sequel
+  sqlite3
 
 BUNDLED WITH
    2.4.1

Rakefile

@@ -1,3 +1,17 @@
+require "logger"
+
 require "minitest/test_task"
 
 Minitest::TestTask.create
+
+namespace :db do
+  desc "Run migrations"
+  task :migrate, [:version] do |t, args|
+    require "sequel/core"
+    Sequel.extension :migration
+    version = args[:version].to_i if args[:version]
+    Sequel.connect(ENV.fetch("DATABASE_URL"), logger: Logger.new($stderr)) do |db|
+      Sequel::Migrator.run(db, "db/migrations", target: version)
+    end
+  end
+end

db/migrations/001_create_entities.rb

@@ -0,0 +1,10 @@
+Sequel.migration do
+  change do
+    create_table(:entities) do
+      primary_key :id
+
+      DateTime :created_at
+      DateTime :modified_at
+    end
+  end
+end