image_processing VS Whenever

Ruby on Rails 7 uses the image_processing gem to resize images, so either uncomment image_processingfrom you Gemfile, or add it if it is not already present.

- [image_processing](https://github.com/janko/image_processing)

image_processing

Working with images is as easy as possible; creating variants to display images in different sizes might be the most common use case in a Rails Application. The image_processing gem is responsible for abstracting the complexity of creating an image variant, like resizing the image to be 300px on the longest side.

Learn about Unix cron and use the whenever gem.

there are cronjob gems available, i believe https://github.com/javan/whenever or so seems to be used frequently

- Use them on a specific schedule as needed by your application, such as taking backups, sending periodic reminders or notifications for users, cleaning the database tables, etc. You can use a gem such as Whenever for managing scheduled cron jobs.

whenever gem is used in Rails applications to schedule cron jobs e.g. send email notification about monthly expenditure on the 1st of each month.

Then you can use the whenever gem to schedule stuff.

- [whenever](https://github.com/javan/whenever)

whenever

There are multiple ways to achieve this. Probably the simplest and most reliable is to rely on cron to run your process every minute. Cron keeps track of time and executes your script each minute. This has the added benefit of avoiding a long running process (which can have its own issues). You can even have your script install it’s own cron job using the Whenever gem.

Rake tasks can be called from Cron, so we'll use the Whenever Gem to automatically add our job to our Crontab during deployment, and keep our schedule in change control.