Chapter 9. File uploading
This chapter covers
- Attaching files to Active Record models using the CarrierWave gem
- Securing file uploads by serving them via a controller
- An introduction to writing JavaScript using CoffeeScript
- Listening and responding to Rails’ JavaScript events
In chapter 8, you learned how to restrict access to specific actions in your application, such as viewing projects and creating tickets, by defining a Role model that keeps track of which users have which roles on which projects. Ticketee’s getting pretty useful now. This chapter focuses on file uploading, the next logical step in a ticket-tracking application.
Sometimes, when people file a ticket on an application such as Ticketee, they want to attach a file to provide more information for that ticket, because words alone can only describe so much. For example, a ticket description saying “This button should move up a bit” could be better explained with a picture showing where the button is now and where it should be. Users may want to attach any kind of file: a picture, a crash log, a text file, you name it. Currently, Ticketee has no way to attach files to the ticket; people would have to upload them elsewhere and then include a link with their ticket description.