How to Upload Files with Ease Using DragonFly: New on Premium

File uploads are generally a tricky area in web development. In this Tuts+ Premium tutorial, we will learn how to use Dragonfly, a powerful Ruby gem that makes it easy and efficient to add any kind of upload functionality to a Rails project.

Become a Premium member to read this tutorial, as well as hundreds of other advanced tutorials and screencasts from the Tuts+ network.

---

What We’re Going to Build

Our sample application will display a list of users, and for each one of them, we will be able to upload an avatar and have it stored. Additionally, Dragonfly will allow us to:

• Dynamically manipulate images without saving additional copies
• Leverage HTTP caching to optimize our application load

Additionally, in this lesson, we will follow a BDD [Behavior Driven Development] approach, using Cucumber and RSpec.

---

Tuts+ Premium

The recently re-launched Tuts+ Premium is a service that provides top-tier training in a variety of creative fields. Whether you prefer books, visual training, or in depth tutorials, we have you covered. While we unfortunately can’t afford to provide the service for free, it’s only $19 a month – less than you’d spend on dinner.

I hope you’ll consider checking it out! In addition to learning a huge variety of new skills, it’s also a fantastic way to say thank you to Nettuts+.