Support any :any => true option to find_tagged_with() to match record…

…s tagged with tags in a list

lib/acts_as_taggable_on/acts_as_taggable_on.rb

@@ -117,6 +117,7 @@ module SingletonMethods
         # Pass either a tag string, or an array of strings or tags
         #
         # Options:
+        #   :any - find models that match any of the given tags
         #   :exclude - Find models that are not tagged with the given tags
         #   :match_all - Find models that match all of the given tags, not just one
         #   :conditions - A piece of SQL conditions to add to the query
@@ -153,6 +154,10 @@ def find_options_for_find_tagged_with(tags, options = {})
             tags_conditions = tag_list.map { |t| sanitize_sql(["#{Tag.table_name}.name LIKE ?", t]) }.join(" OR ")
             conditions << "#{table_name}.#{primary_key} NOT IN (SELECT #{Tagging.table_name}.taggable_id FROM #{Tagging.table_name} JOIN #{Tag.table_name} ON #{Tagging.table_name}.tag_id = #{Tag.table_name}.id AND (#{tags_conditions}) WHERE #{Tagging.table_name}.taggable_type = #{quote_value(base_class.name)})"
 
+          elsif options.delete(:any)
+            tags_conditions = tag_list.map { |t| sanitize_sql(["#{Tag.table_name}.name LIKE ?", t]) }.join(" OR ")
+            conditions << "#{table_name}.#{primary_key} IN (SELECT #{Tagging.table_name}.taggable_id FROM #{Tagging.table_name} JOIN #{Tag.table_name} ON #{Tagging.table_name}.tag_id = #{Tag.table_name}.id AND (#{tags_conditions}) WHERE #{Tagging.table_name}.taggable_type = #{quote_value(base_class.name)})"
+
           else
             tags = Tag.named_like_any(tag_list)
             return { :conditions => "1 = 0" } unless tags.length == tag_list.length

spec/acts_as_taggable_on/taggable_spec.rb

@@ -149,7 +149,17 @@
     TaggableModel.find_tagged_with("ruby, rails", :order => 'taggable_models.name').should == [bob, frank]
     TaggableModel.find_tagged_with(["ruby", "rails"], :order => 'taggable_models.name').should == [bob, frank]    
   end
-
+
+  it "should be able to find tagged with any tag" do
+    bob = TaggableModel.create(:name => "Bob", :tag_list => "fitter, happier, more productive", :skill_list => "ruby, rails, css")
+    frank = TaggableModel.create(:name => "Frank", :tag_list => "weaker, depressed, inefficient", :skill_list => "ruby, rails, css")
+    steve = TaggableModel.create(:name => 'Steve', :tag_list => 'fitter, happier, more productive', :skill_list => 'c++, java, ruby')
+
+    TaggableModel.find_tagged_with(["ruby", "java"], :order => 'taggable_models.name', :any => true).should == [bob, frank, steve]
+    TaggableModel.find_tagged_with(["c++", "fitter"], :order => 'taggable_models.name', :any => true).should == [bob, steve]
+    TaggableModel.find_tagged_with(["depressed", "css"], :order => 'taggable_models.name', :any => true).should == [bob, frank]    
+  end
+
   it "should be able to find tagged on a custom tag context" do
     bob = TaggableModel.create(:name => "Bob")
     bob.set_tag_list_on(:rotors, "spinning, jumping")