See #467, add option to order by number of matching tags.

[Burkazoid]

See issue #467.

Add option to order by number of matching tags when using .tagged_with with the :any => true option.

Option

:order_by_matching_tag_count => true

Option

TaggableModel.tagged_with(["a", "b", "c"], :any => true, :order_by_matching_tag_count => true)

Example usage:

bob = TaggableModel.create(:name => "Bob", :tag_list => "fitter, happier, more productive")
frank = TaggableModel.create(:name => "Frank", :tag_list => "fitter, comfortable, eating well, sleeping well")
steve = TaggableModel.create(:name => 'Steve', :tag_list => 'fitter, comfortable, more productive, at ease')
earl = TaggableModel.create(:name => 'Earl', :tag_list => 'comfortable, sleeping well, eating well, self-employed')

TaggableModel.tagged_with(["fitter", "comfortable", "eating well", "sleeping well"], :any => true, :order_by_matching_tag_count => true)
# = [frank, earl, steve, bob]

Frank matches 4 tags
Earl matches 3 tags
Steve matches 2 tags
Bob matches 1 tag

Additional ordering:

If additional order conditions are specified using the :order option, they will be included as secondary orders: e.g.:

TaggableModel.tagged_with(["a", "b", "c"], :any => true, 
                                           :order_by_matching_tag_count => true,
                                           :order => "taggable_models.name ASC")

Will order by tag count (descending) first, then model's name attribute second.

1 spec test included. Tests passing for me locally.

[seuros]

Can you rebase and force push so i can merge it ?

[Burkazoid]

@seuros Done, I think? Let me know if you need me to do anything else :)