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27 Feb '12, 1am

ASCIIcasts - “Episode 135 - Making a Gem”:

ASCIIcasts - “Episode 135 - Making a Gem”:

Back in episode 33 [ watch , read ], we made a plugin for Rails. A more popular option for extending Rails’ functionality now is to make a gem, and that’s what we’re going to do in this episode. Let’s say that we’d like to be able to generate a unique token for an ActiveRecord model. Given a model with a token column, e.g. the Recipe model below, we want to be able to call a class method called uniquify that will set up a before_create callback so that when we create a new Recipe it automatically generates a random token and ensures that it is unique in the database. class Recipe < ActiveRecord::Base uniquify :token end Creating a Gem Ruby gems can be made from scratch, but this involves a lot of work. An easier way is to use another gem to help create ours. There are several of these including hoe , newgem , bones , gemhub and echoe . Most of them provide generators that ...

Full article: http://asciicasts.com/episodes/135-making-a-gem

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