Add models and rake tasks for migrating

.gitignore

@@ -2,3 +2,4 @@
 /temp.db
 /vendor/
 /bin/
+/.continue/

Rakefile

@@ -1,5 +1,59 @@
+# frozen_string_literal: true
+
+# convert any arguments to a hash, maybe convert to a method and only call when needed
+begin
+  arguments = ARGV.drop(1).map { |pair| pair.split('=', 2) }.to_h
+rescue => e
+  puts "Arguments error: #{e.message}"
+end
+
+
 require 'rake/testtask'
 
 Rake::TestTask.new do |task|
   task.pattern = 'test/*_test.rb'
 end
+
+namespace :db do
+  require_relative 'db'
+  require 'sequel/core'
+  Sequel.extension :migration
+
+  migration_folder='db/migrations'
+
+  desc "Run all pending migrations or to [:version]"
+  task :migrate, [:version] do |t, args|
+    begin
+      version = args[:version].to_i if args[:version] # rake's default way of passing in a single argument
+      version = arguments["version"].to_i if arguments["version"] # override if given key=value arguments
+      Sequel::Migrator.run(DB, "db/migrations", target: version)
+      puts "Migration completed successfully!"
+    rescue => e
+      puts "Migration failed: #{e.message}"
+      exit 1
+    end
+  end
+
+  desc "Rollback the last migration"
+  task :rollback do
+    begin
+      Sequel::Migrator.run(DB, "db/migrations", relative: -1)
+    rescue => e
+      puts "Rollback failed: #{e.message}"
+      exit 1
+    end
+  end
+
+  desc "Show current migration status"
+  task :status do
+    begin
+      status = ""
+      status = "NOT " if Sequel::Migrator.is_current?(DB, migration_folder) == false
+      puts "The database is #{status}current."
+      #puts Sequel::Migrator.is_current?(DB, migration_folder)
+    rescue => e
+      puts "Status check failed: #{e.message}"
+      exit 1
+    end
+  end
+end

db/migrations/0001_create_models_table.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+Sequel.migration do
+  change do
+    create_table(:models) do
+      primary_key :id
+      String :name, null: false
+      String :run_command, null: false, unique: true
+      String :reputation, text: true
+      Integer :context_length
+      Integer :parameters
+      Float :prompt_rate
+      Float :eval_rate
+      String :capabilities
+      String :test_results
+      DateTime :created_at, null: false
+    end
+  end
+end