fixes gh-1954

lib/document.js

@@ -629,6 +629,8 @@ Document.prototype.$__set = function (
     } else {
       if (obj[parts[i]] && 'Object' === obj[parts[i]].constructor.name) {
         obj = obj[parts[i]];
+      } else if (obj[parts[i]] && 'EmbeddedDocument' === obj[parts[i]].constructor.name) {
+        obj = obj[parts[i]];
       } else if (obj[parts[i]] && Array.isArray(obj[parts[i]])) {
         obj = obj[parts[i]];
       } else {

test/document.test.js

@@ -60,6 +60,7 @@ var schema = new Schema({
     }
   , em: [em]
   , date: Date
+  , schedule: [ new Schema({open: Number, close: Number}) ]
 });
 TestDocument.prototype.$__setSchema(schema);
 
@@ -1069,6 +1070,22 @@ describe('document', function(){
           assert.ok(!doc.isModified('nested.age'));
           assert.ok(doc.isModified('nested.deep'));
           assert.equal('Hank and Marie', doc.nested.deep.x);
+
+          var doc = new TestDocument();
+          doc.init({
+              schedule: [{
+                open: 1000,
+                close: 1900
+              }]
+          });
+
+          doc.set('schedule.0.open', 1100);
+          assert.ok(doc.schedule);
+          assert.equal('MongooseDocumentArray', doc.schedule.constructor.name);
+          assert.equal('EmbeddedDocument', doc.schedule[0].constructor.name);
+          assert.equal(1100, doc.schedule[0].open);
+          assert.equal(1900, doc.schedule[0].close);
+
           done();
         })
       })