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Token Fields (revised)
The Chosen plugin makes it easy to turn a many-to-many select menu into a searchable token field. Then see how the jQuery Tokeninput field can help with AJAX loading and creating new records.
(10 minutes)
In-Place Editing
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)
Auto-Complete Association (revised)
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)
Token Fields
With the jQuery Tokeninput plugin it is easy to add an autocompleting list of entries for a many-to-many association.
(11 minutes)