Making search results friendlier for ActiveSupport's memoisation.

lib/thinking_sphinx/search.rb

@@ -80,6 +80,12 @@ def to_a
       @array
     end
 
+    def freeze
+      populate
+      @array.freeze
+      self
+    end
+
     # Indication of whether the request has been made to Sphinx for the search
     # query.
     # 

spec/thinking_sphinx/search_spec.rb

@@ -1172,6 +1172,26 @@
       }.should_not be_nil
     end
   end
+
+  describe '#freeze' do
+    before :each do
+      @search = ThinkingSphinx::Search.new
+    end
+
+    it "should populate the result set" do
+      @search.freeze
+      @search.should be_populated
+    end
+
+    it "should freeze the underlying array" do
+      @search.freeze
+      @search.to_a.should be_frozen
+    end
+
+    it "should return the Search object" do
+      @search.freeze.should be_a(ThinkingSphinx::Search)
+    end
+  end
 end
 
 describe ThinkingSphinx::Search, "playing nice with Search model" do