Rails - Make model without database taggable

Question

I have a tableless model like this:

class Wiki 
    include ActiveModel::AttributeMethods
    include ActiveModel::Validations
    include ActiveModel::Conversion
    extend ActiveModel::Naming

    # No Database
    def persisted?
        false
    end
    # ...
end

When I claim acts_as_taggable in this model, I got undefined local variable or method 'acts_as_taggable' for it. However I tried include ActiveModel::Model, it still doesn't work. Any ideas I can make my tableless model be taggable?

Answer 1

As you can see from the source code of the plugin, it requires that you use it with AR. It includes itself into ActiveRecord::Base.

So, you may want to add those into your class as well, like so:

class Wiki 
    include ActiveModel::AttributeMethods
    include ActiveModel::Validations
    include ActiveModel::Conversion
    extend ActiveModel::Naming

    # Adding `acts_as_taggable`
    extend ActsAsTaggable::Taggable
    include ActsAsTaggable::Tagger

    # No Database
    def persisted?
        false
    end
    # ...
end

---

But!

But, then again, you will have to include more AR modules to make it work. Since, the gem requires that your class AR specific methods that are available in ActiveRecord::Base class, such as has_many, etc.

For example here:

has_many :taggings, :as => :taggable, :dependent => :destroy, :include => :tag, :class_name => "ActsAsTaggable::Extra::Tagging"
has_many :base_tags, :through => :taggings, :source => :tag, :class_name => "ActsAsTaggable::Tag"