README

Set up the application

• Configure env variables for database.
• bundle install
• Run task rake warehouse:load_data to load the sample data.
• Run Rails server.

Test the application

• Use tools like Postman to send a request.
• Use rZvDngfZIHPrU8yZLpcb as the test X-AUTH-TOKEN as header. (This is created in seeder.rb)
• Go to homepage to check products and orders status.

A few things about this sample app

• If no orderIds is sent, an error will be returned.
• Auth header is required to visit the API as I think this is an internal service.
• When product stock is below the threshold, create purchase order method will just return true and update the stock. (For easier testing)
• Order process method will roll back the whole transaction if any orderItem fails. This is an edge case when the system is used by multiple connections.
• If orderIds contains a fulfilled order, it will also be returned in the API response, but the order status will not be flagged "Error: Unfulfillable".