fix($elemMatch): fix $elemMatch for the given example in the github r…

query.js

@@ -314,7 +314,7 @@
             else if (constraint instanceof RegExp) return this.$regex(value, constraint)
             else {
               for (var key in constraint) {
-                if (!this[key]) return this.$eq(value, constraint, row, getter)
+                if (!this[key]) return this._satisfies(value[key], constraint[key], row, getter)
                 else if (!this[key](value, constraint[key], row, getter)) return false;
               }
               return true;

test/elemMatch.js

@@ -151,6 +151,35 @@ describe("Underscore Query Tests", function () {
           }
         });
     assert.equal(result.length, 1);
-  })
 
+    var rows = [
+      {title: "Home", comments:[
+        {text:"I like this post"},
+        {text:"I love this post"},
+        {text:"I hate this post"}
+      ]},
+      {title: "About", comments:[
+        {text:"I like this page"},
+        {text:"I love this page"},
+        {text:"I really like this page"}
+      ]}
+    ];
+    result = _.query(rows, {
+      comments: {
+        $elemMatch: {
+          text: "I really like this page"
+        }
+      }
+    });
+    assert.equal(result.length, 1);
+
+    result = _.query(rows, {
+      comments: {
+        $elemMatch: {
+          text: /really/i
+        }
+      }
+    });
+    assert.equal(result.length, 1);
+  })
 })