kredis VS rubygems

This is where Kredis, a Redis client for Ruby, comes into play, offering a powerful and efficient caching solution.

# Use the Puma web server [https://github.com/puma/puma] gem "puma", "~> 5.0" # Build JSON APIs with ease [https://github.com/rails/jbuilder] # gem "jbuilder" gem 'rack-cors' gem "devise" gem "jsonapi-serializer" gem 'devise-jwt' gem 'active_model_serializers' gem 'followability' gem 'dotenv-rails', groups: [:development, :test, :production] gem 'sprockets' # Use Redis adapter to run Action Cable in production # gem "redis", "~> 4.0" # Use Kredis to get higher-level data types in Redis [https://github.com/rails/kredis] # gem "kredis" # Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword] # gem "bcrypt", "~> 3.1.7" # Windows does not include zoneinfo files, so bundle the tzinfo-data gem gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ] # Reduces boot times through caching; required in config/boot.rb gem "bootsnap", require: false # Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images] # gem "image_processing", "~> 1.2" # Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible # gem "rack-cors" group :development, :test do # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem gem "debug", platforms: %i[ mri mingw x64_mingw ] end group :development do gem "sqlite3", "~> 1.4" # Speed up commands on slow machines / big apps [https://github.com/rails/spring] # gem "spring" end group :production do gem 'pg' end

Now the connection is complete, back to our use case where we want to save the onboarded status for each user. We will use kredis in this case to make our life easier by connecting redis database to the application model. Open the user model app/models/user.rb and then add the kredis_boolean attribute because the type we need is a boolean.

In rate_limited? the method request_counter is called which brings us to the part where Kredis is used. We use Kredis to initialize a counter in Redis. Kredis 'instantiates' the value from Redis. In other words, when you call Kredis.counter("mykey") we have an object that points to a Redis value under mykey. On that object we can call #increment which increments the current value in Redis. As you can see we check if the Redis key exists so that we can decide to use the call with expires_in. Each time you call #counter with expires_in, the expire timer resets. We don't want that because then the key will never expire. Checkout the Kredis docs for more information about Kredis.

Let's anwser those questions by making a simple live counter with Turbo Streams and Kredis.

Would Kredis be helpful?

Didn't know about `kredis_hash` I didn't look too hard at the gem when it was announced. Looks like there's more too, how convenient: https://github.com/rails/kredis/blob/main/lib/kredis/attributes.rb

Kredis is a new gem that makes it easier to work with Redis keys in Ruby on Rails. Kredis was added a suggested gem for new Rails applications starting with the release of Rails 7.0 in December of 2021 and is likely to become a larger force in the Rails world in the coming years.

kredis readme

# Gemfile source 'https://rubygems.org' gem 'dotenv' gem 'json' gem 'pry' gem 'rake' gem 'sassc' gem 'sinatra' gem 'sinatra-activerecord' gem 'sinatra-contrib' gem 'sinatra-static-assets' group :development do gem 'foreman' gem 'rubocop' gem 'sqlite3', '~> 1.3', '>= 1.3.11' end group :test do gem 'rack-test' gem 'rspec', require: 'spec' end group :production do gem 'pg' end

mkdir myapp && cd myapp echo "source 'https://rubygems.org'" > Gemfile echo "gem 'rails', '7.1.3.2'" >> Gemfile bundle install bundle exec rails new . --force --database=postgresql -j=esbuild -c=tailwind

With Ruby installed, you can now manage your RubyGems with the gem command. Install the Rails gem or update if you already have it.

source 'https://rubygems.org'

# frozen_string_literal: true source 'https://rubygems.org' ruby '>= 3.2.2' gem 'aws-sdk-bedrockruntime'

RubyGems Environment: - RUBYGEMS VERSION: 3.4.10 - RUBY VERSION: 3.2.2 (2023-03-30 patchlevel 53) [arm64-darwin22] - INSTALLATION DIRECTORY: /Users/michaeldaross/.asdf/installs/ruby/3.2.2/lib/ruby/gems/3.2.0 - USER INSTALLATION DIRECTORY: /Users/michaeldaross/.gem/ruby/3.2.0 - RUBY EXECUTABLE: /Users/michaeldaross/.asdf/installs/ruby/3.2.2/bin/ruby - GIT EXECUTABLE: /usr/bin/git - EXECUTABLE DIRECTORY: /Users/michaeldaross/.asdf/installs/ruby/3.2.2/bin - SPEC CACHE DIRECTORY: /Users/michaeldaross/.gem/specs - SYSTEM CONFIGURATION DIRECTORY: /Users/michaeldaross/.asdf/installs/ruby/3.2.2/etc - RUBYGEMS PLATFORMS: - ruby - arm64-darwin-22 - GEM PATHS: - /Users/michaeldaross/.asdf/installs/ruby/3.2.2/lib/ruby/gems/3.2.0 - /Users/michaeldaross/.gem/ruby/3.2.0 - GEM CONFIGURATION: - :update_sources => true - :verbose => true - :backtrace => true - :bulk_threshold => 1000 - "gem" => "--no-document" - REMOTE SOURCES: - https://rubygems.org/ ...

Gem::Ext::BuildError: ERROR: Failed to build gem native extension. current directory: /usr/share/rvm/gems/ruby-2.7.5/gems/mysql2-0.5.5/ext/mysql2 /usr/share/rvm/rubies/ruby-2.7.5/bin/ruby -I /usr/share/rvm/rubies/ruby-2.7.5/lib/ruby/2.7.0 -r ./siteconf20231208-2396-1amnwp6.rb extconf.rb checking for rb_absint_size()... yes checking for rb_absint_singlebit_p()... yes checking for rb_gc_mark_movable()... yes checking for rb_wait_for_single_fd()... yes checking for rb_enc_interned_str() in ruby.h... no ----- Cannot find library dir(s) /home/julio/.rvm/usr/lib ----- *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/share/rvm/rubies/ruby-2.7.5/bin/$(RUBY_BASE_NAME) --with-openssl-dir --with-openssl-dir --with-openssl-include --without-openssl-include=${openssl-dir}/include --with-openssl-lib --without-openssl-lib=${openssl-dir}/lib To see why this extension failed to compile, please check the mkmf.log which can be found here: /usr/share/rvm/gems/ruby-2.7.5/extensions/x86_64-linux/2.7.0/mysql2-0.5.5/mkmf.log extconf failed, exit code 1 Gem files will remain installed in /usr/share/rvm/gems/ruby-2.7.5/gems/mysql2-0.5.5 for inspection. Results logged to /usr/share/rvm/gems/ruby-2.7.5/extensions/x86_64-linux/2.7.0/mysql2-0.5.5/gem_make.out An error occurred while installing mysql2 (0.5.5), and Bundler cannot continue. Make sure that `gem install mysql2 -v '0.5.5' --source 'https://rubygems.org/'` succeeds before bundling.

Bundle complete! 14 Gemfile dependencies, 83 gems now installed. run bundle lock --add-platform=x86_64-linux Fetching gem metadata from https://rubygems.org/......... Resolving dependencies... Writing lockfile to C:/Users/****/Desktop/Projects/Rails/MyFirstProject/Gemfile.lock run bundle binstubs bundler rails importmap:install bin/rails aborted! Errno::ENOENT: No such file or directory - C:/Users/****/Desktop/Projects/Rails/MyFirstProject/Rakefile (Errno::ENOENT) :37:in `require' :37:in `require' bin/rails:4:in `' (See full trace by running task with --trace) rails turbo:install stimulus:install bin/rails aborted! Errno::ENOENT: No such file or directory - C:/Users/****/Desktop/Projects/Rails/MyFirstProject/Rakefile (Errno::ENOENT) :37:in `require' :37:in `require' bin/rails:4:in `' (See full trace by running task with --trace)

-----> Building on the Heroku-22 stack -----> Determining which buildpack to use for this app ! Warning: Multiple default buildpacks reported the ability to handle this app. The first buildpack in the list below will be used. Detected buildpacks: Ruby,Node.js See https://devcenter.heroku.com/articles/buildpacks#buildpack-detect-order -----> Ruby app detected -----> Installing bundler 2.3.25 -----> Removing BUNDLED WITH version in the Gemfile.lock -----> Compiling Ruby/Rails -----> Using Ruby version: ruby-3.1.2 -----> Installing dependencies using bundler 2.3.25 Running: BUNDLE_WITHOUT='development:test' BUNDLE_PATH=vendor/bundle BUNDLE_BIN=vendor/bundle/bin BUNDLE_DEPLOYMENT=1 bundle install -j4 Fetching gem metadata from https://rubygems.org/........ 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Gems in the groups 'development' and 'test' were not installed. Bundled gems are installed into `./vendor/bundle` Post-install message from devise:

bestgems.org is not rubygems.org and I could not yet find how they are taking their data.