# Allow CORS (Cross-Origin Resource Sharing) requests
use Rack::Cors do
  allow do
    # origins '*' allows requests from ALL frontend origins
    # (if you deploy your application, change this to
    # ONLY allow requests from YOUR frontend origin, like:
    # origins 'my-react-app.netlify.app')
    origins '*'
    resource '*', headers: :any, methods: [:get, :post, :delete, :put, :patch, :options, :head]
  end
end

You don't have to make any changes to this configuration to complete this lab, but CORS warnings are a very common thing to encounter in web development, so next time you see them, you'll know what this means!

Work through the deliverables below. There are tests in the chatterbox-server folder. Because of this lab's project structure, running learn test won't work — instead, you'll need to cd into the chatterbox-server directory and run rspec (or bundle exec rspec) to run the tests for the Sinatra backend.

Make sure to try out your routes from the React frontend application as well once you have everything set up. You can run your Sinatra server with:

$ bundle exec rake server

You'll need to change the fetch requests in React to use http://localhost:9292 as well.

Start by generating a Message model and the necessary migration code to create messages with the following attributes:

• body: string
• username: string
• created_at: timestamp
• updated_at: timestamp

After creating the model and migrations, run the migrations and use the provided seeds.rb file to seed the database:

$ bundle exec rake db:migrate db:seed

Build out the following routes to handle the necessary CRUD actions:

• GET /messages: returns an array of all messages as JSON, ordered by created_at in ascending order.
• POST /messages: creates a new message with a body and username from params, and returns the newly created post as JSON.
• PATCH /messages/:id: updates the body of the message using params, and returns the updated message as JSON.
• DELETE /messages/:id: deletes the message from the database.

• CORS Explained
• The rack-cors Gem