3 ms·

Blown away this is possible. When I was starting to learn to code and was overwhelmed when learning all the bits and pieces of rails, I wondered if everything n

by nomilk 2y ago

Blown away this is possible. When I was starting to learn to code and was overwhelmed when learning all the bits and pieces of rails, I wondered if everything necessary to run a very small app could be placed in a single file. I guess this is the answer, but in python/django instead of ruby/rails. It would be a fun exercise in ruby/rails too (not totally sure if it's possible, but suspect it may be, albeit probably resulting in a larger file than the one you give above!)

cassiogo 2y ago
Not that I think this is pratical or even looks good, but its also doable with rails require 'bundler/inline' gemfile(true) do source 'https://rubygems.org' gem 'rails', '~> 7.1' gem "sqlite3", "~> 1.4" end require 'rails' require 'active_record/railtie' database = 'app_development.sqlite3' ENV['DATABASE_URL'] = "sqlite3:#{database}" ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: database) ActiveRecord::Schema.define do create_table :my_table, force: true do |t| t.integer :my_table_id end end class App < Rails::Application routes.append do root to: 'home#index' end end class HomeController < ActionController::Base def index render inline: 'HOME' end end App.initialize! run App For very small apps on ruby land sinatra and roda are the right choices. On python the choice would be flask instead of the single file django.
- mg 2y ago
  Is the db mandatory in Rails or could the db specific lines be removed from the code if no db is needed?
  - cassiogo 2y ago
    Not mandatory, you could remove that
    - mg 2y ago
      Cool. What would be the steps from a fresh Debian to get it running and see it in action?
      - cassiogo 2y ago
        Not sure debian has (a modern) ruby installed by default, but I think you only need to have a working ruby installation and running the script. On a sidenote, this came out recently and could interest you https://dashbit.co/blog/announcing-phoenix-playground https://dashbit.co/blog/announcing-phoenix-playground
        mg 2y ago
        I tried it like this: 1: apt install ruby 2: Put your code in test.rb 3: ruby test.rb I then I got: Gem::Ext::BuildError: ERROR: Failed to build gem native extension. \e[0m current directory: /var/lib/gems/3.1.0/gems/stringio-3.1.1/ext/stringio /usr/bin/ruby3.1 -I /usr/lib/ruby/vendor_ruby -r ./siteconf20240626-4044-iylnuy.rb extconf.rb mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h You might have to install separate package for the ruby development environment, ruby-dev or ruby-devel for example. So I tried: 4: apt install ruby-dev 5: ruby test.rb Then I got: [4147, #<Thread:0x00007f9a4af6bc60 run>, #<NameError: uninitialized constant Gem::Source (defined?(@source) && @source) || Gem::Source::Installed.new ^^^^^^^^
ranger_danger 2y ago
This is also easily done by design with flask or quart, and probably several other frameworks.

by nomilk 2y ago

cassiogo 2y ago

Not that I think this is pratical or even looks good, but its also doable with rails require 'bundler/inline' gemfile(true) do source 'https://rubygems.org' gem 'rails', '~> 7.1' gem "sqlite3", "~> 1.4" end require 'rails' require 'active_record/railtie' database = 'app_development.sqlite3' ENV['DATABASE_URL'] = "sqlite3:#{database}" ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: database) ActiveRecord::Schema.define do create_table :my_table, force: true do |t| t.integer :my_table_id end end class App < Rails::Application routes.append do root to: 'home#index' end end class HomeController < ActionController::Base def index render inline: 'HOME' end end App.initialize! run App For very small apps on ruby land sinatra and roda are the right choices. On python the choice would be flask instead of the single file django.

mg 2y ago
Is the db mandatory in Rails or could the db specific lines be removed from the code if no db is needed?
- cassiogo 2y ago
  Not mandatory, you could remove that
  - mg 2y ago
    Cool. What would be the steps from a fresh Debian to get it running and see it in action?
    - cassiogo 2y ago
      Not sure debian has (a modern) ruby installed by default, but I think you only need to have a working ruby installation and running the script. On a sidenote, this came out recently and could interest you https://dashbit.co/blog/announcing-phoenix-playground https://dashbit.co/blog/announcing-phoenix-playground
      - mg 2y ago
        I tried it like this: 1: apt install ruby 2: Put your code in test.rb 3: ruby test.rb I then I got: Gem::Ext::BuildError: ERROR: Failed to build gem native extension. \e[0m current directory: /var/lib/gems/3.1.0/gems/stringio-3.1.1/ext/stringio /usr/bin/ruby3.1 -I /usr/lib/ruby/vendor_ruby -r ./siteconf20240626-4044-iylnuy.rb extconf.rb mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h You might have to install separate package for the ruby development environment, ruby-dev or ruby-devel for example. So I tried: 4: apt install ruby-dev 5: ruby test.rb Then I got: [4147, #<Thread:0x00007f9a4af6bc60 run>, #<NameError: uninitialized constant Gem::Source (defined?(@source) && @source) || Gem::Source::Installed.new ^^^^^^^^

ranger_danger 2y ago

This is also easily done by design with flask or quart, and probably several other frameworks.