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Plugin: create better urls with has_wfid

Posted by Sandro Paganotti in Ruby on Rails - comments are closed

/projects/1/milestones/3

/projects/1-install-ubuntu/milestones/3-order-a-free-cd

The implementation is quite simple, you’ve just to add a line to the model file and specify which fields you want to use to create the url

class Project < ActiveRecord::Base
has_many :milestones
has_wfid :fields=>%w(title)
end

class Milestone < ActiveRecord::Base
belongs_to :project
has_wfid :fields=>%w(title)
end

and then use wfid instead of id while creating urls in your controller:

milestone_url(:project_id=> current_milestone.project.wfid, :id=>current_milestone.wfid ) 

That’s it !

Now let’s take a look at the main method inside the plug-in (I’ve already wrote a tutorial that explains how to create an acts_as plugin so please refer to it if you need more detailed info) :

def has_wfid(options = {})

 class_eval <<-END
     define_method("wfid") do
       val = (#{options[:fields].join(" + ")}).gsub(/\W+/, ' ').strip.downcase.gsub(/\ +/, '-')
       val.blank? ? id.to_s : id.to_s + "-" + val
     end
 END

end

Hope you’ll find this useful!

ps: you can find the zipped plug-in here while I’m working on a dedicated svn repository.

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