https://www.youtube.com/watch?v=dqjF3C9A-Yg&list=PL-1jnVsiYID5HpCRxhsfEuscBXWrWuB6s&index=1

• ruby 3.0.1p64 (2021-04-05 revision 0fb782ee38) [x86_64-linux]
• Rails 6.1.4

Carrierwave Steps:

$ rails g uploader Image # will create app/uploaders/image_uploader.rb
$ touch config/initializers/carrierwave.rb
$ touch config/application.yml # set local environment variables used by figaro

Change to storage :fog in image_uploader.rb. Add configuration to carrierwave.rb Add environment variables in application.yml

Connect model to uploader file. In 'app/models/post.rb' add:

mount_uploader :image, ImageUploader

Use mount_uploaders for multiple file uploads and mount_uploader for single file uploads. Post model has field image that is of type string.

Create controller in app/controller/posts_controller.rb Create form/view in app/views/posts/new.html.erb

If webpacker stops responding to changes in application.scss or application.js, run this command in terminal:

$ rails webpacker:install

$ gem install pg
$ sudo apt-get update
$ sudo apt install postgresql postgresql-contrib libpq-dev
# Create a new database role
$ sudo -u postgres createuser -s dynamic -P

Instead of dynamic use the linux username you are logged in with.

In file config/database.yml:

...
default: &default
  adapter: postgresql
  encoding: unicode
  # For details on connection pooling, see Rails configuration guide
  # http://guides.rubyonrails.org/configuring.html#database-pooling
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: dynamic
  password: your password here

development:
  <<: *default
  database: appname_development

Instead of dynamic use the linux username you are logged in with

$ rails db:create
$ rails db:migrate

Run in terminal:

$ rake webpacker:install
$ sudo service postgresql start

• https://www.digitalocean.com/community/tutorials/how-to-use-postgresql-with-your-ruby-on-rails-application-on-ubuntu-18-04
• Bootstrap Bare Template - https://startbootstrap.com/template/bare