Forms often follow a similar pattern with a lot of repetition. Learn how to clean up form views and remove duplication with the help of form builders. (12 minutes)

A many-to-many association can be edited through check boxes in a form. Here I show how to do this with a has_many through association complete with clickable labels. (6 minutes)

With the release of OmniAuth 1.0 there is a new Identity strategy which allows users to register/login with a password if they don't want to use an external provider. (11 minutes)

Allow users to interactively crop uploaded images using Jcrop and Carrierwave. Includes a live preview that shows the resulting image. (11 minutes)

Edit an attribute in-place without leaving a page using the Best In Place gem. Learn how to add validations and support for various field types. (8 minutes)

Do you need to dynamically change one select menu based on the value of another? Here I show how to filter states/provinces by a selected country using grouped options and a dab of CoffeeScript. (7 minutes)

It is often best to use a GET request when submitting a search form, however if it is an advanced search form with a lot of fields then this may not be ideal. Here I show how to create a search resource to handle this. (6 minutes)

A select menu is often used for setting a belongs_to association, but you should also consider using a text field with autocomple. Here I use jQuery UI and show two different solutions: client side and server side. (9 minutes)

Showing validation errors inline as the user is filling out the form can lead to a better use experience. Learn how to do this using the Client Side Validations gem. (8 minutes)

With the jQuery Tokeninput plugin it is easy to add an autocompleting list of entries for a many-to-many association. (11 minutes)