Ruby on Rails Notes

These are the notes I took while going through this free Ruby on Rails course: https://www.youtube.com/watch?v=fmyvWz5TUWg

Install everything here: https://guides.rubyonrails.org/getting_started.html

To upgrade Ruby version and install Rails:

command curl -sSL https://rvm.io/pkuczynski.asc | gpg --import -
\curl -L https://get.rvm.io | bash -s stable
source /Users/mgwozdz/.rvm/scripts/rvm
rvm | head -n 1
rvm use ruby --install --default
gem install rails
rails --version

Start a new project:

rails new <project name>

Start the server

rails s

Rails generate a controller for the home page:

rails g controller home index

Display report of all routes:

rails routes

Crud scaffold for roster data model command:

rails g scaffold roster first_name:string last_name:string email:string phone:string

Push model into database:

rails db:migrate

Setting up Authentication:

rubygems.org search for devise copy version line into Gemfile bundle install On rubygems.org, click on the Documentation for devise rails generate devise:install Follow the instructions that were output, including:

rails g devise:views
rails generate devise User
rails db:migrate

Setting up Associations (joining two db tables):

https://edgeguides.rubyonrails.org/association_basics.html In roster data model, add belongs_to :user. In user data model, add has_many :rosters In terminal, generate migration to add user_id to rosters table as an index. Then push the migration.

rails g migration add_user_id_to_rosters user_id:integer:index
rails db:migrate

Use Heroku for Hosting

Google "heroku toolbelt" to find the Heroku CLI Install the CLI Verify the installation by typing heroku --version in the terminal There will be a warning and a version in the output Sign up for a free account at heroku.com In the terminal, enter heroku login to login to the CLI heroku create This will output the url for your app. You can change the name of the app... heroku rename railsroster The url for the app is now https://railsroster.herokuapp.com/ Add your SSH keys: heroku keys:add Switch the sqlite3 gem to only be used in development and create a new group in the Gemfile for production and have it use the postgres (pg) gem instead. bundle install --without production Commit your changes to git with the usual git add ., git commit -am 'added pg to production', git push Push to heroku with git push heroku main If there are errors, follow the instructions in the output to resolve them. Then commit the changes and push them to main and retry the push to heroku. Push database migrations to heroku: heroku run rails db:migrate Your app should now be running on https://railsroster.herokuapp.com/