Why not use blank?

def category_ids=(category_id_array)
self.categories = category_id_array.reject(&:blank?).collect { |category_id| WidgetCategory.find(category_id.to_i) }
end

Nice one Victor. The answer is, that I didn’t know about :blank? And, I must admit that I only learned about passing procs in as blocks this month, so it’s not an area that I use much. Still, your implementation above is nicer than mine, I like it. :)

This looks like it could come in very handy for a few projects I’ve got going. Thanks for plugify-ing it :)

This looks like it could come in very handy for a few projects I’ve got going. Thanks for plugify-ing it :)

I have created a minor patch for this plugin. It’s a great idea, but a few parts were still very specific to your app. This path adds some configuration options:

Patch pasted here: http://rafb.net/paste/results/iUHAOd95.nln.html

• :label_method: provide symbol that is the name of the method to be called on the associated object to generate their displayed names. This is necessary because you may not have a method named to_label.
• :conditions: simply passed into the find method that retrieves the available associated objects. This lets you tailor exactly what records appear in the list.

In my app I can now do this:

:title, 
     :conditions   => ['tags.category = ?', true] %>

That patch got nuked somehow.

http://pastie.caboo.se/19139

Great Job Craig and Nice addition Alex. Alex, I have done the same thing as you, but i added :include, :order, :limit, and other find-based config options to allow it to work with a habtm style setup.

Example: You want to have user select which categories they wish to see, so for the habtm (users_categories table) you could call it such as:

:full_name,
            :include => [:users] #habtm lookup
            :conditions => ['user_id = ?', @current_user.id,
            :order => 'categories.name asc' } %>

Note: For those who don’t know, the :to_label (or with alex’s code what you define as :label_method) needs to be located in the model for your lookup table (e.g. Category in the sample above)

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Thanks for the plugin guys! I just have one Q.

You say:

since your model object has a categories= method, but no category_ids= method, you’ll have to create one (in category.rb):

Do you really mean category.rb? or should it be the widget model?

Cheers,
:-Davo

Thank you for the associated_list helper. I made the modifications suggested by Alex and Jim above, and am already using your helper in our application. This, or a similar helper, is needed in Rails.

Thanks for this beautiful plugin i have this trouble when launch:

method `reflect_on_association’ for NilClass:Class

Extracted source (around line #1):

1:

My Controllers :

class UsersController “users_votes”
end

class Vote “users_votes”
end

i have user_votes table with user_id and vote_id column.

Sorry I couldn’t see the Demo. It said erer