How do I constantly monitor a Rails database & then action an alert?
How do I constantly monitor a Rails database & then action an alert? eg. I want the user to save an alert in the backend. The backend would check an external API and compare the price in the DB against the price of the external API. When they match, Rails would action an alert. How would i make this scalable if there are hundreds of alerts & send alerts at a certain future date as well?