Olivier Buffon olivierbuffon

Ruby: The future of frozen string literals

What is a literal?

In programming languages, literals are textual representations of values in the source code. This is a syntactical concept.

Some examples:

7 # integer literal

JWT Auth + Refresh Tokens in Rails

This is just some code I recently used in my development application in order to add token-based authentication for my api-only rails app. The api-client was to be consumed by a mobile application, so I needed an authentication solution that would keep the user logged in indefinetly and the only way to do this was either using refresh tokens or sliding sessions.

I also needed a way to both blacklist and whitelist tokens based on a unique identifier (jti)

Before trying it out DIY, I considered using:

Cheat Sheets are greate but they are not a substitute for learning the framework and reading the documentation as we most certainly have not covered every potential example here. Please refer to the Rails Command Line Docs for more information.

Command Line Generator Info

Reference

You can get all of this information on the command line.

rails generate with no generator name will output a list of all available generators and some information about global options. rails generate GENERATOR --help will list the options that can be passed to the specified generator.

	import { useMemo } from 'react';
	import {
	ApolloClient,
	HttpLink,
	ApolloLink,
	InMemoryCache,
	NormalizedCacheObject,
	concat,
	} from '@apollo/client';
	import { createPersistedQueryLink } from '@apollo/client/link/persisted-queries';

	# frozen_string_literal: true

	module Avo
	class ActionPolicyAuthorizationClient
	include ActionPolicy::Behaviour

	def authorize(user, record, action, policy_class: nil)
	authorize!(record, to: action, with: policy_class, context: {user: user})
	rescue ActionPolicy::NotFound => error
	raise NoPolicyError.new error.message

	local lspconfig = require('lspconfig')

	-- https://github.com/tailwindlabs/tailwindcss-intellisense/issues/737
	lspconfig.tailwindcss.setup {
	--on_attach = on_attach,
	--flags = lsp_flags,

	filetypes = { "aspnetcorerazor", "astro", "astro-markdown", "blade", "clojure", "django-html", "htmldjango", "edge", "eelixir", "elixir", "ejs", "erb", "eruby", "gohtml", "haml", "handlebars", "hbs", "html", "html-eex", "heex", "jade", "leaf", "liquid", "markdown", "mdx", "mustache", "njk", "nunjucks", "php", "razor", "slim", "twig", "css", "less", "postcss", "sass", "scss", "stylus", "sugarss", "javascript", "javascriptreact", "reason", "rescript", "typescript", "typescriptreact", "vue", "svelte", "ruby" },
	init_options = {
	userLanguages = {

	# Basic key operators to query the JSON objects :

	# #> : Get the JSON object at that path (if you need to do something fancy)
	# -> : Get the JSON object at that path (if you don't)
	# ->> : Get the JSON object at that path as text
	# {obj, n} : Get the nth item in that object

	# https://www.postgresql.org/docs/9.4/functions-json.html#FUNCTIONS-JSONB-OP-TABLE
	# Date
	# date before today

	# official docs: https://graphql-ruby.org/dataloader/sources.html

	# app/graphql/sources/association.rb
	class Sources::Association < ::GraphQL::Dataloader::Source
	def initialize(association_name, scope = nil)
	@association_name = association_name
	@scope = scope
	end

	def fetch(records)

	-- Eviline config for lualine
	-- Author: shadmansaleh
	-- Credit: glepnir
	local lualine = require 'lualine'

	-- Color table for highlights
	local colors = {
	bg = '#202328',
	fg = '#bbc2cf',
	yellow = '#ECBE7B',

	$ git clone [email protected]:xxxxx/xxxx.git my-awesome-proj
	Cloning into 'my-awesome-proj'...
	ssh: connect to host github.com port 22: Connection timed out
	fatal: Could not read from remote repository.

	$ # This should also timeout
	$ ssh -T [email protected]
	ssh: connect to host github.com port 22: Connection timed out

	$ # but this might work