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Originally built in 2016 - updating now in 2020 for the archives!

##practice milia app - fully functioning multi tenant -This allows different tenants (organizations)
-Projects built by admins within the tenant/org, you can invite users per project -saves files with AWS S3 bucket

#If cloning this realize a couple of things

-it's using sqlite3 in development and PostgreSQL in production (gemfile)

##sendgrid- emailing from Heroku -it's using sendgrid for sign-up email confirmations (set in .baschrc using Cloud9)

export SENDGRID_USERNAME=xxxxxxxxxx
export SENDGRID_PASSWORD=xxxxxxxxxx

-send grid port (config/environment.rb) :port => '587' for heroku sign-ups :port => '2587' for Cloud9 sign-ups

-config/environments/development.rb and production has something that needs to be addressed:
development:
config.action_mailer.default_url_options = { :host => 'http://example.c9users.io'}
production:
config.action_mailer.default_url_options = { :host => 'example.herokuapp.com', :protocol => 'https'}

-config/initializers/devise.rb - where the email notifications are coming from:
config.mailer_sender = 'example@example'

##it uses AWS for file storage - just needs an S3 bucket and credentials Set them for Heroku through your termianl:

$ heroku config:set S3_ACCESS_KEY=xxxxxxxxxxxxxxxxxx
$ heroku config:set S3_SECRET_KEY=xxxxxxxxxxxxxxxxxx
$ heroku config:set S3_BUCKET=xxxxxxxxxxxxxxxxxx

-I tried setting these as environment variables for development with no luck:
maybe they were misnamed - I'm really not sure
(set in .baschrc using Cloud9)

export AWS_ACCESS_KEY_ID=xxxxxxxxxxxxxxxxxx
export AWS_SECRET_ACCESS_KEY=xxxxxxxxxxxxxxxxxx
export AWS_REGION=xxxxxxxxxxxxxxxxxx
export S3_BUCKET=xxxxxxxxxxxxxxxxxx

I ended up saving what I needed here and blocking it with .gitignore:
/app/models/mine.rb

Here are the example mine.rb contents:

    def upload_to_s3
        s3 = Aws::S3::Resource.new(region:'your-region-1', access_key_id: 'xxxxxxxxxxxxxxxxxx',
        secret_access_key: 'xxxxxxxxxxxxxxxxxx')
        tenant_name = Tenant.find(Thread.current[:tenant_id]).name
        obj = s3.bucket('yourbucketname').object("#{tenant_name}/#{upload.original_filename}")
        obj.upload_file(upload.path, acl:'public-read')
        self.key = obj.public_url
    end

The switch happens around line 14 of app/models/artifact.rb:

  if Rails.env.development?
    require_relative 'mine'
  else
    def upload_to_s3
        s3 = Aws::S3::Resource.new(ENV["AWS_REGION"], ENV["AWS_ACCESS_KEY_ID"], ENV["AWS_SECRET_ACCESS_KEY"])
        tenant_name = Tenant.find(Thread.current[:tenant_id]).name
        obj = s3.bucket(ENV["S3_BUCKET"]).object("#{tenant_name}/#{upload.original_filename}")
        obj.upload_file(upload.path, acl:'public-read')
        self.key = obj.public_url  
    end
  end

*See, in production it uses the environment variables provided through the terminal to Heroku