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Image Manipulation
Learn how to do extensive image manipulation with the ImageMagick commands. Also learn how RMagick can be used in combination with CarrierWave to process uploaded images.
(11 minutes)
Cropping Images (revised)
Allow users to interactively crop uploaded images using Jcrop and Carrierwave. Includes a live preview that shows the resulting image.
(11 minutes)
Cropping Images
Present a slick user interface for cropping image attachments using Jcrop and Paperclip.
(14 minutes)
Uploading to Amazon S3
Here I show how to upload files directly to Amazon S3 using CarrierWave Direct and Fog. I then walk through another project which uses jQuery File Upload to handle multiple files and does not use CarrierWave.
(14 minutes)
jQuery File Upload
Here you will learn how to upload multiple files over ajax using jQuery File Upload. I start with the basic functionality and customize it to fit the user interface.
(13 minutes)
CarrierWave File Uploads
CarrierWave makes it easy and clean to add file uploads to your application. It supports a variety of ORMs, frameworks and image processors.
(9 minutes)
More on Twitter Bootstrap
This episode continues on the Twitter Bootstrap project showing how to display flash messages, add form validations with SimpleForm, customize layout with variables, and switch to using Sass.
(12 minutes)
PayPal Recurring Billing
Here I show how to add PayPal recurring payments to an existing checkout process using PayPal's Express Checkout and the paypal-recurring gem.
(24 minutes)
Strong Parameters
The strong_parameters gem is an improvement over attr_accessible to securely handle mass assignment even when you have complex authorization logic. The functionality will likely be added to Rails 4 so it is a good idea to learn how it works.
(12 minutes)
Generating RSS Feeds (revised)
If you have a page containing a dynamic list of records, consider providing an RSS or Atom feed for it. It is quite easy to do with XML Builder and the atom_feed helper method as shown in this episode.
(8 minutes)