Thiago Marinho thiagomarinho

Rails Active Storage Cheatsheet

Rails Active Storage Cheatsheet
- Install Active Storage
- Usage
Install this libraries first

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

If you find that vagrant box list somehow does not contain a box you previously had, you can sometimes add the box back if you still have the sources for it in ~/.vagrant.d/boxes.

$ cd ~/.vagrant.d/boxes/precise64/0/virtualbox/
$ tar czf ~/precise64.box .
$ vagrant box add precise64 ~/precise64.box 
Downloading box from URL: file:/Users/ryanuber/precise64.box
Extracting box...te: 417M/s, Estimated time remaining: --:--:--)
Successfully added box 'precise64' with provider 'virtualbox'!

	blueprint:
	name: Sensor Light
	description: >
	# 💡 Sensor Light

	Version: 8.0


	Your lighting experience, your way - take control and customize it to perfection! 💡✨

	#!/bin/sh

	alias dm='docker-machine'
	alias dmx='docker-machine ssh'
	alias dk='docker'
	alias dki='docker images'
	alias dks='docker service'
	alias dkrm='docker rm'
	alias dkl='docker logs'
	alias dklf='docker logs -f'

	# Rails controller concern to enable Devise authentication for ActiveStorage.
	# Put it in +app/controllers/concerns/blob_authenticatable.rb+ and include it when overriding
	# +ActiveStorage::BlobsController+ and +ActiveStorage::RepresentationsController+.
	#
	# Optional configuration:
	#
	# Set the model that includes devise's database_authenticatable.
	# Defaults to Devise.default_scope which defaults to the first
	# devise role declared in your routes (usually :user)
	#

	import javax.crypto.Cipher;
	import java.io.InputStream;
	import java.security.*;
	import java.util.Base64;

	import static java.nio.charset.StandardCharsets.UTF_8;

	public class RsaExample {
	public static KeyPair generateKeyPair() throws Exception {
	KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");

	import java.io.FileDescriptor;
	import java.io.FileOutputStream;
	import java.io.IOException;
	import java.io.OutputStream;
	import java.io.PrintStream;

	public class HelloWorld{
	private static HelloWorld instance;
	public static void main(String[] args){
	instantiateHelloWorldMainClassAndRun();

	HTTP status code symbols for Rails

	Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.

	Status Code Symbol
	1xx Informational
	100 :continue
	101 :switching_protocols
	102 :processing

	# Original Rails controller and action
	class EmployeesController < ApplicationController
	def create
	@employee = Employee.new(employee_params)

	if @employee.save
	redirect_to @employee, notice: "Employee #{@employee.name} created"
	else
	render :new
	end