Merge pull request #4555 from timwis/patch-1

Merge pull request 4555

lib/jekyll/filters.rb

@@ -222,7 +222,7 @@ module Jekyll
     def where(input, property, value)
       return input unless input.is_a?(Enumerable)
       input = input.values if input.is_a?(Hash)
-      input.select { |object| item_property(object, property).to_s == value.to_s }
+      input.select { |object| Array(item_property(object, property)).map(&:to_s).include?(value.to_s) }
     end
 
     # Sort an array of objects

test/test_filters.rb

@@ -321,6 +321,21 @@ class TestFilters < JekyllUnitTest
         assert_equal 2, @filter.where(@array_of_objects, "color", "red").length
       end
 
+      should "filter array properties appropriately" do
+        hash = {"a"=>{"tags"=>["x","y"]}, "b"=>{"tags"=>["x"]}, "c"=>{"tags"=>["y","z"]}}
+        assert_equal 2, @filter.where(hash, "tags", "x").length
+      end
+
+      should "filter array properties alongside string properties" do
+        hash = {"a"=>{"tags"=>["x","y"]}, "b"=>{"tags"=>"x"}, "c"=>{"tags"=>["y","z"]}}
+        assert_equal 2, @filter.where(hash, "tags", "x").length
+      end
+
+      should "not match substrings" do
+        hash = {"a"=>{"category"=>"bear"}, "b"=>{"category"=>"wolf"}, "c"=>{"category"=>["bear","lion"]}}
+        assert_equal 0, @filter.where(hash, "category", "ear").length
+      end
+
       should "stringify during comparison for compatibility with liquid parsing" do
         hash = {
           "The Words" => {"rating" => 1.2, "featured" => false},