Telegram

Take Telegram API Token Connect to an example API: https://api.telegram.org/bot{{API_TOKEN_KEY}}/getMe

Send messages: https://api.telegram.org/bot6379697986:AAGSPiv82e1YWf9UAOsbilii8OvyxQrbGU0/sendMessage?chat_id={{chat_id or group_id}}&text=abc

Devise

rails generate devise:install

rails generate devise User

Add config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }to config/environments/development.rb

Trackable to show ip

Create Post and send to Telegram

rails g scaffold Article title content:text --no-help --no-assets --no-controller-specs --no-view-specs --no-test-framework --no-jbuilder

rails g mailer TelegramMailer

Export pdf

gem 'wicked_pdf'
gem 'wkhtmltopdf-binary'

rails generate wicked_pdf

Add

WickedPdf.config ||= {}
WickedPdf.config.merge!({
  layout: "pdf",
  orientation: "Portrait",
  page_size: "A4"
})

to config/initializers/wicked_pdf.rb

Create template: app/views/articles/show.pdf.erb

Create main template: app/views/layouts/pdf.html.erb

Pagy

gem 'pagy'

class ApplicationController < ActionController::Base
  include Pagy::Backend
  before_action :authenticate_user!
end

module ApplicationHelper
  include Pagy::Frontend
end

<%== pagy_nav(@pagy) %>
<%== pagy_info(@pagy) %>
<%== pagy_bootstrap_nav(@pagy) %>

Attach avatar

active_storage:install

  <div>
    <%= form.label :avatar%>
    <%= form.file_field :avatar %>
  </div>

Attach multi images

has_many_attached :images

<div>
  <%= form.label :images%>
  <%= form.file_field :images, multiple: true %>
</div>

AWS S3

Auto delete, update item after calling action destroy, update

Delete item on S3 @article.images.purge

EDITOR="gedit --wait" bin/rails credentials:edit

Validate image

gem 'active_storage_validations'
gem 'mini_magick'
gem "image_processing"

then add validate to model

On linux, install sudo apt-get install libvips-tools

AWS SES send mail

Config access: AmazonSesSendingAccess => IAM

USing AWS SES service to send mail

Add bootstrap and fix errors + gem 'foreman' to run

Add bootstrap: Boostrap components

bundle add cssbundling-rails
./bin/rails css:install:bootstrap

bundle add jsbundling-rails
./bin/rails javascript:install:esbuild

Fix errors

yarn add @hotwired/turbo-rails

yarn add @hotwired/stimulus

--- a/app/javascript/application.js
+++ b/app/javascript/application.js
-import "controllers"
+import "./controllers";

--- a/app/javascript/controllers/index.js
+++ b/app/javascript/controllers/index.js
-import { application } from "controllers/application"
-
-// Eager load all controllers defined in the import map under controllers/**/*_controller
-import { eagerLoadControllersFrom } from "@hotwired/stimulus-loading"
-eagerLoadControllersFrom("controllers", application)
-
-// Lazy load controllers as they appear in the DOM (remember not to preload controllers in import map!)
-// import { lazyLoadControllersFrom } from "@hotwired/stimulus-loading"
-// lazyLoadControllersFrom("controllers", application)
+import { application } from "./application";

--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
     <%= stylesheet_link_tag "application", "data-turbo-track": "reload" %>
-    <%= javascript_importmap_tags %>
     <%= javascript_include_tag "application", "data-turbo-track": "reload", defer: true %>
   </head>

--- a/app/assets/config/manifest.js
+++ b/app/assets/config/manifest.js
 //= link_tree ../images
-//= link_tree ../../javascript .js
-//= link_tree ../../../vendor/javascript .js
 //= link_tree ../builds

bundle exec foreman start -f Procfile.dev

Action text

bin/rails action_text:install

has_rich_text :description description is new column

Add font awesome

Add gem "font-awesome-sass" Docs

yarn add @fortawesome/fontawesome-free

In package.json, esbuild add --loader:.ttf=file --loader:.woff2=file at the end

In application.js, add

import "@fortawesome/fontawesome-free/css/all"
import "@fortawesome/fontawesome-free/js/all";

Use smth like fa-3x for font size. Use fa-spin to make any icon spin. Animating Icons

Add template footer and header

Footer Component

Captcha

gem 'invisible_captcha' to prevent two creating on one time

rails g devise:controllers users -c=registrations only to create registrations_controller

Rubocop

gem 'rubocop-rails', require: false

Modify config in .rubocop.yml

Run by bundle exec rubocop

Rubocop a file rubocop app/models/user.rb

Disable

Some codes:

  # rubocop: disable Metrics/AbcSize, Metrics/MethodLength
  def full_name
    ...
  end
  # rubocop: enable Metrics/AbcSize, Metrics/MethodLength

All a file:

# .rubocop.yml
Metrics/ClassLength:
  Exclude:
    - 'app/models/user.rb'
    - 'app/controllers/users_controller.rb'

Auto correct

# console - safe auto correct
rubocop -a

# console - dangerous auto correct
rubocop - A

# console - autocorrect a single specific cop
bundle exec rubocop -a --only Style/FrozenStringLiteralComment
bundle exec rubocop -A --only Layout/EmptyLineAfterMagicComment

# generate comments for uncorrected problems and stop flagging them as TODO:
rubocop --auto-correct --disable-uncorrectable

Gem traceroute

Find controllers without linked routes

Find routes without linked controller actions

Add gem 'traceroute' to Gemfile

Check by run rake traceroute

Modify config in .traceroute.yaml

QRcode

gem "rqrcode"
gem "chunky_png"
gem "barby"

They must have active_storage

---

NOTE

Rollback bin/rails destroy scaffold Post

S3, SES, Cloudformation

Create new Rails app

gem 'pundit'

bundle exec foreman start -f Procfile.dev

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