sergii

Friendly URLs

By default, Rails applications build URLs based on the primary key -- the id column from the database. Imagine we have a Person model and associated controller. We have a person record for Bob Martin that has id number 6. The URL for his show page would be:

/people/6

But, for aesthetic or SEO purposes, we want Bob's name in the URL. The last segment, the 6 here, is called the "slug". Let's look at a few ways to implement better slugs.

sergii

This list is based on aliases_spec.rb.

You can see also Module: RSpec::Matchers API.

matcher	aliased to	description
a_truthy_value	be_truthy	a truthy value
a_falsey_value	be_falsey	a falsey value
be_falsy	be_falsey	be falsy
a_falsy_value	be_falsey	a falsy value

sergii

## /etc/openresty/nginx.conf


user www-data;
events {
  worker_connections 1024;
}

http {
  lua_shared_dict auto_ssl 1m;

sergii

class Device < ApplicationRecord
  # Define Validation Errors (TODO: Move it to a Validator)
  class DeviceHasBeenAlreadySetUpError < StandartError
    def message
      "Device [#{@device.id}] has been already set up."
    end
  end

  # => raise DeviceHasBeenAlreadySetUpError if @device.setup_at.present?

sergii

require "rails_helper"

feature "User signs up" do
  scenario "and is added to the roster" do
    visit root_path
    fill_in "Name", with: "Mickey Mouse"
    fill_in "Experience", with: "Junior"
    click_button "Sign Me Up!"

    expect(page).to have_text("Mickey Mouse")

sergii

# Create and restore backups on PostgreSQL (tested on 9.2 and 9.3)

# create database backup
PGPASSWORD="XXX" pg_dump --no-owner --no-acl -U USER DATABASE -h HOST -F t > output_file.tar

# create database backup (heroku)
heroku pgbackups:capture
heroku pgbackups # show stored backups (assuming a117 is the desired one)
heroku pgbackups:url a117 # => it retrieves dump url on AWS S3

sergii

Sort_by ruby method - sorting using multiple attributes.

I guess everyone knows that feeling when you struggle with a codewars kata, create (or even not!) a looong solution, then you check the solutions of of others and go whaaaaaaaat -- they did it in one line?

This is how I felt today and this is how I refreshed my memory of Ruby's sort_by method.

Task:

sergii

Rails Active Storage Cheatsheet

• Rails Active Storage Cheatsheet
  • Install Active Storage
  • Usage
    • Model
    • Controller
    • Views (in ERB)
    • Display Image and its variants or Preview (PDF or Video)
• Install this libraries first

sergii

How to reset PG Database on Heroku?

• Step 1: heroku restart
• Step 2: heroku pg:reset DATABASE (no need to change the DATABASE)
• Step 3: heroku run rake db:migrate
• Step 4: heroku run rake db:seed (if you have seed)

One liner

heroku restart; heroku pg:reset DATABASE --confirm APP-NAME; heroku run rake db:migrate

sergii

# Additional translations at https://github.com/scambra/devise_invitable/wiki/I18n

ru:
  devise:
    failure:
      invited: 'У вас есть непринятое приглашение, подтвердите его чтобы продолжить создание аккаунта.'
    invitations:
      send_instructions: 'Письмо с приглашением было отправлено на %{email}.'
      invitation_token_invalid: 'Неверный токен приглашения.'
      updated: 'Ваш пароль успешно сохранен. Вы вошли в систему.'