Ryan's Scraps: What's New in Edge Rails: Nested Object Forms

Declare an enum attribute where the values map to integers in the database, but can be queried by name.

I just finished reviewing Rails 2.3 Nested Object Forms. While a very nice and “magical” feature, I’ve got to admit that I’m really not that crazy about how it works.

Generally for nested forms, a blank form is placed below all other existing object forms. If you would like to change the position of the...

While 2.0 will include a number of syntax changes, new features and general improvements, mentioned below, it is anticipated to remain backward compatible with code written for 1.9.3 and Matz has stated that the changes are less significant than t...

Let's say we have posts with an attribute title that is mandatory.

Our example feature request is to tag these posts with a limited number of tags. The following chapters explain different approaches in Rails, how you can assign such a...

Here are some popular mistakes when using nested forms:

• You are using fields_for instead of form.fields_for.
• You forgot to use accepts_nested_attributes in the containing model. Rails won't complain, but nothing will work. In particular...

Yesterday, there was a blog post entitled “What the Hell is Happening to Rails” that stayed at the number one spot on Hacker News for quite a while. The post and many (but not most) the comments on the post reflect deep-seated concern about the re...

Sometimes you want to fetch associations for an ActiveRecord that you already loaded, e.g. when it has deeply nested associations.

Edge Rider gives your models a static method preload_associations. The ...

This card describes four variants, that add a more intuitive workflow when working with nested attributes in Rails + Unpoly:

1. Without JS
2. With HTML template and JS
3. [With...