Fix query casting for inequalities in arrays

In 8bdc3d1, support for inequalities $gt, $gte, $lt, and $lte were added for
queries involving arrays, but the values given to queries were always cast to
numbers. This change uses castForQuery so that it is cast to the attribute's
type specified in the schema.

closes #1101

lib/schema/array.js

@@ -200,10 +200,10 @@ SchemaArray.prototype.$conditionalHandlers = {
   , '$regex': SchemaArray.prototype.castForQuery
   , '$near': SchemaArray.prototype.castForQuery
   , '$nearSphere': SchemaArray.prototype.castForQuery
-  , '$gt': castToNumber
-  , '$gte': castToNumber
-  , '$lt': castToNumber
-  , '$lte': castToNumber
+  , '$gt': SchemaArray.prototype.castForQuery
+  , '$gte': SchemaArray.prototype.castForQuery
+  , '$lt': SchemaArray.prototype.castForQuery
+  , '$lte': SchemaArray.prototype.castForQuery
   , '$within': function(val) {
       var query = new Query(val);
       query.cast(this.casterConstructor)

test/query.test.js

@@ -660,6 +660,31 @@ describe('Query', function(){
       assert.deepEqual(params.ids.$elemMatch.$in[0].toString(), ids[0]);
       assert.deepEqual(params.ids.$elemMatch.$in[1].toString(), ids[1]);
     })
+
+    it('inequality operators for an array', function() {
+      var query = new Query();
+      var db = start();
+      var Product = db.model('Product');
+      var Comment = db.model('Comment');
+      db.close();
+
+      var id = new DocumentObjectId;
+      var castedComment = { _id: id, text: 'hello there' };
+      var comment = new Comment(castedComment);
+
+      var params = {
+          ids: { $gt: id }
+        , comments: { $gt: comment }
+        , strings: { $gt: 'Hi there' }
+        , numbers: { $gt: 10000 }
+      };
+
+      query.cast(Product, params);
+      assert.equal(params.ids.$gt, id);
+      assert.deepEqual(params.comments.$gt, castedComment);
+      assert.equal(params.strings.$gt, 'Hi there');
+      assert.equal(params.numbers.$gt, 10000);
+    })
   })
 
   describe('distinct', function(){