README

---

Peer.ai Backend

Table of Contents

• Chapter 0 - Usage
• Chapter 1 - Setup Ruby on Rails App
• Chapter 2 - Setup RSpec Gem and Guard RSpec Gem
• Chapter 3 - Setup Devise Gem
• Chapter 4 - Setup Act As Taggable Gem
• Chapter 5 - Setup Act As Tree Gem with UserProfile SkillToken Model

Chapter 0 - Usage

• Install Ruby on Rails >5.1.3
• Install dependencies

  bundle install
  

• Run PostgreSQL
• Create and Migrate the database

  bundle exec rails db:drop db:create db:migrate
  

• Run Guard

  bundle exec guard
  

• Run API Server

  bundle exec rails s
  

• Modify RSpec tests and code implementation

Chapter 1 - Setup Ruby on Rails App

rails new --api peerai-backend --database=postgresql --skip-test

Chapter 2 - Setup RSpec Gem and Guard RSpec Gem

• Reference: https://github.com/rspec/rspec-rails
• Add to Gemfile

  gem 'rspec-rails', '~> 3.6'
  gem 'guard-rspec', require: false
  

• Install dependencies

  bundle install
  

• Setup RSpec directory

  bundle exec rails generate rspec:install
  

• Generate empty Guardfile

  bundle exec guard init rspec
  

• Customise Guardfile
  • Reference: https://github.com/guard/guard/wiki/Guardfile-DSL---Configuring-Guard
• Run Guard

  bundle exec guard
  

Chapter 3 - Setup Devise Gem

• Reference: https://github.com/plataformatec/devise
• Add to Gemfile

  gem 'devise'
  

• Install dependencies

  bundle install
  

• Run Devise generator

  bundle exec rails g devise:install
  

• Run tests

  bundle exec rspec
  

• Add Generator configuration to application.rb.

  config.generators do |g|
    g.orm :active_record
    g.test_framework :rspec
  end
  

  • Reference: http://guides.rubyonrails.org/configuring.html
• Generate Tests for User model

  bundle exec rails generate rspec:model User
  

• Create Test Database

  bundle exec rails db:create db:migrate RAILS_ENV=test
  

• Run tests

  bundle exec rspec
  

• Generate User model

  bundle exec rails generate devise User
  

• Migrate Devise User into database

  bundle exec rails db:migrate RAILS_ENV=test
  

• Run tests
• Generate Custom Devise Controllers

  bundle exec rails generate devise:controllers user
  

• Override routes in routes.rb

  devise_for :users, controllers: {
    sessions: 'users/sessions',
    registrations: 'users/registrations'
  }
  

• Add requirement for authentication in application_controller.rb

  before_action :authenticate_user!
  

• Uncomment the following in rails_helper.rb

  Dir[Rails.root.join('spec/support/**/*.rb')].each { |f| require f }
  

• Add to spec/support/devise.rb

  require 'devise'
  require 'support/factory_bot'
  require_relative 'support/controller_macros'
  RSpec.configure do |config|
    config.include Devise::TestHelpers, :type => :controller
  end
  

• Add ControllerMacros
  • Reference: https://github.com/plataformatec/devise/wiki/How-To:-Test-controllers-with-Rails-3-and-4-(and-RSpec)
• Add controller tests

  bundle exec rails g rspec:controller application
  

• Add FactoryBotRails

  gem 'factory_bot_rails', '~> 4.0'
  

  • Reference: https://github.com/thoughtbot/factory_bot/blob/master/GETTING_STARTED.md#configure-your-test-suite
• Add to spec/support/factory_bot.rb

  RSpec.configure do |config|
    config.include FactoryBot::Syntax::Methods
  end
  

• Add to spec/factories/user.rb

  FactoryBot.define do
    factory :user do
      email "ltfschoen@gmail.com"
      password "12345678"
    end
  end
  

• Add to spec/factories/user.rb
  • Reference: https://github.com/thoughtbot/factory_bot/blob/master/GETTING_STARTED.md#configure-your-test-suite
• Run tests

Chapter 4 - Setup Act As Taggable Gem

• Reference: https://github.com/mbleigh/acts-as-taggable-on
• Add to Gemfile

  gem 'acts-as-taggable-on', '~> 4.0'`
  

• Remove the following from the Gemfile to prevent error NameError: uninitialized constant SkillToken::ActsAsTree

  # gem 'spring'
  # gem 'spring-watcher-listen', '~> 2.0.0'
  

• Install dependency

  bundle install

• Generate migration files in db/migrate

  rails acts_as_taggable_on_engine:install:migrations

  • Add Fixes - mbleigh/acts-as-taggable-on#845
• Run PostgreSQL server
• Migrate migrations into PostgreSQL tables rails db:migrate

Chapter 5 - Setup Act As Tree Gem with Profile SkillToken Model

• Add Profile model

  bundle exec rails g model Profile user:references
  

• Add associations to User

  has_one :profile, class_name: 'Profile'
  delegate :skill_tokens, :to => :profile
  

  • Reference: https://stackoverflow.com/questions/12606212/rails-3-has-many-through-has-one

• Add associations to Profile

  belongs_to :user
  has_many :skill_tokens
  

• Add Parent model for ActsAsTree

  bundle exec rails g model Parent
  

• Add HABTM association to Parent model

  has_and_belongs_to_many :skill_tokens
  

• Add SkillToken model with extra attribute parent for ActsAsTree

  bundle exec rails g model SkillToken name:string amount:decimal weight:decimal profile:references parent:references
  

• Add ActsAsTree Gem to Gemfile

  gem 'acts_as_tree', '~> 2.7.0'
  

• Add associations to SkillToken

  belongs_to :profile, class_name: 'Profile'
  

• Add to SkillToken model

  belongs_to :profile, class_name: 'Profile'
  has_and_belongs_to_many :parents
  validates_presence_of :name
  
  extend ActsAsTree::TreeView
  acts_as_tree order: 'name'
  

• Migrate database

  bundle exec rails db:drop db:create db:migrate
  

• Run rails

  bundle exec rails s
  

  • Troubleshooting
    • Problem

      $ rails s
      Could not find bcrypt-3.1.11 in any of the sources
      Run `bundle install` to install missing gems.
      

    • Solution
      • Uncomment in Gemfile gem 'bcrypt', '~> 3.1.11'
      • Run gem pristine bcrypt --version 3.1.11
      • Run bundle exec as prefix before any rails command

• Rails console

  bundle exec rails c
  
  # create user and profile
  user1 = User.create(email: 'a@a.com', password: '12345678', encrypted_password: '12345678')
  user1.profile = Profile.create(user_id: user1.id)
  # create root
  root = SkillToken.create(name: "root", weight: 1, profile_id: user1.profile.id)
  # verify that root's parent is nil
  root.parent
  # show the Tree View
  SkillToken.tree_view(:name)
  # create parent root
  parent1 = Parent.create(id: 1)
  # create child1 with root as parent
  child1 = root.children.create(name: "child1", weight: 1, profile_id: user1.profile.id, parent_id: parent1.id)
  # create parent of sub-child
  parent2 = Parent.create(id: child1.id)
  # create sub-child1 of child1
  subchild1 = child1.children.create(name: "subchild1", weight: 1, profile_id: user1.profile.id, parent_id: child1.id)
  # show parents
  Parent.all
  # create sub-child2 of child1
  subchild2 = child1.children.create(name: "subchild2", weight: 1, profile_id: user1.profile.id, parent_id: child1.id)
  # show the Tree View
  SkillToken.tree_view(:name)
  # |_ root
  #   |_ child1
  #     |_ subchild1
  #     |_ subchild2
  # show subchildren
  root.children.first.children
  

  • Note: Run the following if existing data previously added to the DB tables

    user1 = User.all.first
    user1.profile = Profile.all.first
    root = SkillToken.all.first
    root.children
    root.children.first.children
    

• Note:

  • Error reported and solution - amerine/acts_as_tree#71