This acts_as extension adds the protocol (eg 'http://') to a url database column if missing. It also validates the url against a regular expression.
A common usecase would be in blog comments where you want the user to be able to specify his/her website:
class Comment < ActiveRecord::Base acts_as_url :website end >> comment = Comment.new => #<Comment:0x245fed8 ... >
The protocol is added just before the comment is saved to the database (as a before_save callback).
>> comment.website = 'example.com/path/to/file.html' => "example.com/path/to/file.html" >> comment.save => true >> comment.website => "http://example.com/path/to/file.html"
In this case protocol is already given and is therefore not added, however a trailing slash is appended.
>> comment.website = 'https://example.org' => "https://example.org" >> comment.save => true >> comment.website => "https://example.org/"
The url will be validated before it is saved to the database.
>> comment.website = 'not a url' => "not a url" >> comment.invalid? => true
By default allowed protocols are http and https, but you can set it specificly for an attribute as a hash value (with the attribute as the key):
acts_as_url :website, :repository => 'git'
If you want to allow several protocols, you can use an array:
acts_as_url :website => ['https', 'http']
Note that the first value in the array will always be the one prepended to the url if a protocol is omitted by the user.
>> comment.website = 'www.example.com' => "www.example.com" >> comment.website => "https://www.example.com/"
Copyright © 2009 Molte Emil Strange Andersen, released under the MIT license