Added new views that use the database

.gitignore

@@ -0,0 +1,2 @@
+/.rake_tasks~
+/temp.db

Gemfile

@@ -4,6 +4,13 @@ gem 'roda'
 gem 'rack-unreloader'
 gem 'tilt'
 gem 'erubi'
+gem 'sequel'
+gem 'rake'
+
+# Change to whatever database you plan to use
+gem 'sqlite3'
+# gem 'pg' # will also want gem sequel-pg
+# gem 'mysql2'
 
 # change to gunicorn or passenger if you prefer:
 gem 'puma'

README.md

@@ -2,6 +2,8 @@
 
 For the single file app template, really the only file you need is the config.ru and run it with puma.
 
+## Database
+
 ## Views
 
 In this template, I've taken the single-file template and split up the config.ru to put routes and app logic in app.rb and call on templates to render proper html pages.  `tilt` and `erubi` gems are added to do the rendering, and `rack-unreloader` gem is added to have puma automatically load file changes while running in development mode.
@@ -21,7 +23,7 @@ Will need ruby; install it via package manager or a ruby manager like rbenv/ruby
 With this example, will basically just ignore the project's Gemfile.  Debian 12 has a pretty current ruby version so just using it.
 
 ```
-sudo apt install ruby ruby-rack puma ruby-erubi ruby-tilt
+sudo apt install ruby ruby-rack puma ruby-erubi ruby-tilt ruby-sequel ruby-sqlite3 rake
 sudo gem install roda rack-unreloader
 ```
 

Rakefile

@@ -0,0 +1,33 @@
+namespace :db do
+
+  migrator = lambda do |version|
+    require_relative 'db'
+    Sequel.extension :migration
+    Sequel::Migrator.apply(DB, 'migrate', version)
+  end
+
+  namespace :migrate do
+
+    desc "Perform migration up to latest migration available"
+    task :up do
+      migrator.call(nil)
+    end
+
+    desc "Perform migration all the way down (erase all data)"
+    task :down do
+      migrator.call(0)
+    end
+
+  end
+
+  desc "Erase all data, then bring back to latest migration"
+  task :reset do
+    migrator.call(0)
+    Sequel::Migrator.apply(DB, 'migrate')
+  end
+  
+  #desc "Migrate to a specific version"
+  #task :migrate do |version|
+  #end
+
+end

app.rb

@@ -14,6 +14,12 @@ class App < Roda
       view :index
     end
 
+    r.is 'users' do
+      @users = User.order(:id)
+      view :users
+    end
+
+    r.on 'hello' do
       r.is String do |name|
         @page_title = 'A Custom Greeting'
         @name = name.capitalize
@@ -21,4 +27,5 @@ class App < Roda
       end
     end
   end
+end
 

config.ru

@@ -3,7 +3,8 @@ dev = ENV['RACK_ENV'] == 'development'
 
 require 'rack/unreloader'
 
-Unreloader = Rack::Unreloader.new(:subclasses=>%w'Roda', :reload=>dev){App}
+Unreloader = Rack::Unreloader.new(:subclasses=>%w'Roda Sequel::Model', reload: dev, autoload: dev){App}
+Unreloader.require './models.rb'
 Unreloader.require './app.rb'
 
 run(dev ? Unreloader : App)

db.rb

@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+require 'sequel/core'
+
+DB = Sequel.connect('sqlite://temp.db')

migrate/001_create_users_table.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+Sequel.migration do
+  change do
+    create_table(:users) do
+      primary_key :id
+      String :name, unique: true, null: false
+    end
+  end
+end
+

models.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+require_relative 'db'
+require 'sequel/model'
+
+if ENV['RACK_ENV'] == 'development'
+  Sequel::Model.cache_associations = false
+end
+
+unless defined?(Unreloader)
+  require 'rack/unreloader'
+  Unreloader = Rack::Unreloader.new(reload: false, autoload: !ENV['NO_AUTOLOAD'])
+end
+
+Unreloader.autoload('models'){|f| Sequel::Model.send(:camelize, File.basename(f).sub(/\.rb\z/, ''))}

models/user.rb

@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+class User < Sequel::Model
+end

views/index.erb

@@ -1,3 +1,3 @@
 <p class="subtitle is-3">
-  Welcome to my new page!
+  Welcome to my new page!  Running in <%= ENV['RACK_ENV'] %> mode!
 </p>

views/users.erb

@@ -0,0 +1,5 @@
+<% for u in @users do %>
+  <p class="subtitle is-3">
+    Hello, <%= u.name %>!  You're #<%= u.id %>!
+  </p>
+<% end %>