In#matches? and Nin#matches? should work with Array fields. Fixes #889.

Author: ebeigarts

lib/mongoid/matchers/in.rb

@@ -14,7 +14,7 @@ class In < Default
       #
       # @return [ true, false ] If a value exists.
       def matches?(value)
-        value.values.first.include?(@attribute)
+        Array.wrap(@attribute).any? { |e| value.values.first.include?(e) }
       end
     end
   end

lib/mongoid/matchers/nin.rb

@@ -14,7 +14,7 @@ class Nin < Default
       #
       # @return [ true, false ] If a value exists.
       def matches?(value)
-        !value.values.first.include?(@attribute)
+        Array.wrap(@attribute).none? { |e| value.values.first.include?(e) }
       end
     end
   end

spec/unit/mongoid/matchers_spec.rb

@@ -208,6 +208,31 @@
         end
       end
 
+      context "with an $in selector on Array" do
+
+        context "when the attributes match" do
+
+          let(:selector) do
+            { :services => { "$in" => [ "first" ] } }
+          end
+
+          it "returns true" do
+            document.matches?(selector).should be_true
+          end
+        end
+
+        context "when the attributes do not match" do
+
+          let(:selector) do
+            { :number => { "$in" => [ "none" ] } }
+          end
+
+          it "returns false" do
+            document.matches?(selector).should be_false
+          end
+        end
+      end
+
       context "with an $in selector" do
 
         context "when the attributes match" do
@@ -308,6 +333,31 @@
         end
       end
 
+      context "with a $nin selector on Array" do
+
+        context "when the attributes match" do
+
+          let(:selector) do
+            { :services => { "$nin" => [ "none" ] } }
+          end
+
+          it "returns true" do
+            document.matches?(selector).should be_true
+          end
+        end
+
+        context "when the attributes do not match" do
+
+          let(:selector) do
+            { :services => { "$nin" => [ "first" ] } }
+          end
+
+          it "returns false" do
+            document.matches?(selector).should be_false
+          end
+        end
+      end
+
       context "with a $nin selector" do
 
         context "when the attributes match" do