diff --git a/example/lib/data/base/api_response.dart b/example/lib/data/base/api_response.dart
index 5f6fdf336..41e4067ab 100644
--- a/example/lib/data/base/api_response.dart
+++ b/example/lib/data/base/api_response.dart
@@ -5,7 +5,7 @@ import 'api_error.dart';
 class ApiResponse {
   ApiResponse(this.success, this.statusCode, this.results, this.error)
       : count = results?.length ?? 0,
-        result = results?.first;
+        result = results?.isNotEmpty ?? false ? results.first : null;
 
   final bool success;
   final int statusCode;
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 6a6f48435..c16dbb45a 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -304,7 +304,7 @@ class _MyAppState extends State<MyApp> {
     if (result.success) {
       if (result.result is ParseObject) {
         final ParseObject parseObject = result.result;
-        print(parseObject.className);
+        print(parseObject.parseClassName);
       }
     }
   }
diff --git a/example/test/data/repository/diet_plan/repository_diet_plan_api_test.dart b/example/test/data/repository/diet_plan/repository_diet_plan_api_test.dart
index 9536a8ea8..e6c18926f 100644
--- a/example/test/data/repository/diet_plan/repository_diet_plan_api_test.dart
+++ b/example/test/data/repository/diet_plan/repository_diet_plan_api_test.dart
@@ -34,7 +34,7 @@ void main() {
     test('add DietPlan from API', () async {
       // Given
       final DietPlan expected = getDummyDietPlan();
-      expected.getObjectData()['objectId'] = null;
+      expected['objectId'] = null;
 
       // When
       final ApiResponse response = await repository.add(expected);
@@ -51,11 +51,11 @@ void main() {
       // Given
       final List<DietPlan> actual = List<DietPlan>();
       final DietPlan item1 = getDummyDietPlan();
-      item1.getObjectData()['objectId'] = null;
+      item1['objectId'] = null;
       item1.protein = 5;
       actual.add(item1);
       final DietPlan item2 = getDummyDietPlan();
-      item2.getObjectData()['objectId'] = null;
+      item2['objectId'] = null;
       item2.protein = 6;
       actual.add(item2);
 
@@ -74,7 +74,7 @@ void main() {
     test('getById DietPlan from API', () async {
       // Given
       final DietPlan dummy = getDummyDietPlan();
-      dummy.getObjectData()['objectId'] = null;
+      dummy['objectId'] = null;
 
       // When
       final ApiResponse response = await repository.add(dummy);
@@ -95,7 +95,7 @@ void main() {
     test('getNewerThan DietPlan from API', () async {
       // Given
       final DietPlan dummy = getDummyDietPlan();
-      dummy.getObjectData()['objectId'] = null;
+      dummy['objectId'] = null;
 
       // When
       final ApiResponse baseResponse = await repository.add(dummy);
@@ -120,11 +120,11 @@ void main() {
       final List<DietPlan> actual = List<DietPlan>();
 
       final DietPlan item1 = getDummyDietPlan();
-      item1.getObjectData()['objectId'] = null;
+      item1['objectId'] = null;
       item1.protein = 5;
       actual.add(item1);
       final DietPlan item2 = getDummyDietPlan();
-      item2.getObjectData()['objectId'] = null;
+      item2['objectId'] = null;
       item2.protein = 6;
       actual.add(item2);
 
@@ -142,7 +142,7 @@ void main() {
     test('update DietPlan from API', () async {
       // Given
       final DietPlan expected = getDummyDietPlan();
-      expected.getObjectData()['objectId'] = null;
+      expected['objectId'] = null;
       final ApiResponse response = await repository.add(expected);
       final DietPlan initialResponse = response.result;
 
@@ -165,11 +165,11 @@ void main() {
       final List<DietPlan> actual = List<DietPlan>();
 
       final DietPlan item1 = getDummyDietPlan();
-      item1.getObjectData()['objectId'] = null;
+      item1['objectId'] = null;
       item1.protein = 7;
       actual.add(item1);
       final DietPlan item2 = getDummyDietPlan();
-      item2.getObjectData()['objectId'] = null;
+      item2['objectId'] = null;
       item2.protein = 8;
       actual.add(item2);
       await repository.addAll(actual);
diff --git a/example/test/data/repository/diet_plan/repository_diet_plan_db_test.dart b/example/test/data/repository/diet_plan/repository_diet_plan_db_test.dart
index f60dff301..d29564a73 100644
--- a/example/test/data/repository/diet_plan/repository_diet_plan_db_test.dart
+++ b/example/test/data/repository/diet_plan/repository_diet_plan_db_test.dart
@@ -126,7 +126,7 @@ void main() {
     // Given
     final DietPlan expected = getDummyDietPlan();
     // ignore: invalid_use_of_protected_member
-    expected.getObjectData()[keyVarUpdatedAt] = DateTime.now();
+    expected[keyVarUpdatedAt] = DateTime.now();
     final ApiResponse response = await repository.add(expected);
 
     // When
diff --git a/lib/src/network/parse_live_query.dart b/lib/src/network/parse_live_query.dart
index 5b11aadd9..5c4a48f46 100644
--- a/lib/src/network/parse_live_query.dart
+++ b/lib/src/network/parse_live_query.dart
@@ -48,7 +48,7 @@ class LiveQuery {
       _liveQueryURL = _liveQueryURL.replaceAll('http', 'ws');
     }
 
-    final String _className = query.object.className;
+    final String _className = query.object.parseClassName;
     query.limiters.clear(); //Remove limits in LiveQuery
     final String _where = query._buildQuery().replaceAll('where=', '');
 
diff --git a/lib/src/network/parse_query.dart b/lib/src/network/parse_query.dart
index 749527e96..797fc4182 100644
--- a/lib/src/network/parse_query.dart
+++ b/lib/src/network/parse_query.dart
@@ -246,7 +246,7 @@ class QueryBuilder<T extends ParseObject> {
   // Add a constraint to the query that requires a particular key's value match another QueryBuilder
   // ignore: always_specify_types
   void whereMatchesQuery(String column, QueryBuilder query) {
-    final String inQuery = query._buildQueryRelational(query.object.className);
+    final String inQuery = query._buildQueryRelational(query.object.parseClassName);
 
     queries.add(MapEntry<String, dynamic>(
         _SINGLE_QUERY, '\"$column\":{\"\$inQuery\":$inQuery}'));
@@ -255,7 +255,7 @@ class QueryBuilder<T extends ParseObject> {
   //Add a constraint to the query that requires a particular key's value does not match another QueryBuilder
   // ignore: always_specify_types
   void whereDoesNotMatchQuery(String column, QueryBuilder query) {
-    final String inQuery = query._buildQueryRelational(query.object.className);
+    final String inQuery = query._buildQueryRelational(query.object.parseClassName);
 
     queries.add(MapEntry<String, dynamic>(
         _SINGLE_QUERY, '\"$column\":{\"\$notInQuery\":$inQuery}'));
diff --git a/lib/src/objects/parse_base.dart b/lib/src/objects/parse_base.dart
index 71e01e0c0..c0c133298 100644
--- a/lib/src/objects/parse_base.dart
+++ b/lib/src/objects/parse_base.dart
@@ -1,12 +1,11 @@
 part of flutter_parse_sdk;
 
 abstract class ParseBase {
-  String className;
+  String parseClassName;
   Type type;
-
-  String setClassName(String className) => this.className = className;
-
-  String getClassName() => className;
+  bool _dirty = false; // reserved property
+  final Map<String, dynamic> _unsavedChanges = Map<String, dynamic>();
+  final Map<String, dynamic> _savingChanges = Map<String, dynamic>();
 
   /// Stores all the values of a class
   Map<String, dynamic> _objectData = Map<String, dynamic>();
@@ -16,6 +15,40 @@ abstract class ParseBase {
 
   set objectId(String objectId) => set<String>(keyVarObjectId, objectId);
 
+  bool isDirty({String key}) {
+    if (key != null) {
+      return _unsavedChanges[key] != null;
+    }
+    return _isDirty(true);
+  }
+
+  bool _isDirty(bool considerChildren) {
+    if (_dirty || _unsavedChanges.isNotEmpty) {
+      return true;
+    }
+
+    if (considerChildren) {
+      return _areChildrenDirty(Set<dynamic>());
+    }
+    return false;
+  }
+
+  bool _areChildrenDirty(Set<dynamic> seenObjects) {
+    if (seenObjects.contains(this)) {
+      return false;
+    }
+    seenObjects.add(this);
+    if (_dirty || _unsavedChanges.isNotEmpty) {
+      return true;
+    }
+    _getObjectData().forEach((String key, dynamic value) {
+      if (value is ParseObject && value._areChildrenDirty(seenObjects)) {
+        return true;
+      }
+    });
+    return false;
+  }
+
   /// Returns [DateTime] createdAt
   DateTime get createdAt {
     if (get<dynamic>(keyVarCreatedAt) is String) {
@@ -40,7 +73,7 @@ abstract class ParseBase {
   @protected
   Map<String, dynamic> toJson({bool full, bool forApiRQ = false}) {
     final Map<String, dynamic> map = <String, dynamic>{
-      keyVarClassName: className,
+      keyVarClassName: parseClassName,
     };
 
     if (objectId != null) {
@@ -55,7 +88,8 @@ abstract class ParseBase {
       map[keyVarUpdatedAt] = _parseDateFormat.format(updatedAt);
     }
 
-    getObjectData().forEach((String key, dynamic value) {
+    final Map<String, dynamic> target = forApiRQ ? _unsavedChanges : _getObjectData();
+    target.forEach((String key, dynamic value) {
       if (!map.containsKey(key)) {
         map[key] = parseEncode(value, full: full);
       }
@@ -81,7 +115,7 @@ abstract class ParseBase {
     }
 
     objectData.forEach((String key, dynamic value) {
-      if (key == className || key == '__type') {
+      if (key == parseClassName || key == '__type') {
         // NO OP
       } else if (key == keyVarObjectId) {
         objectId = value;
@@ -98,9 +132,9 @@ abstract class ParseBase {
           set<DateTime>(keyVarUpdatedAt, value);
         }
       } else if (key == keyVarAcl) {
-        getObjectData()[keyVarAcl] = ParseACL().fromJson(value);
+        this[keyVarAcl] = ParseACL().fromJson(value);
       } else {
-        getObjectData()[key] = parseDecode(value);
+        this[key] = parseDecode(value);
       }
     });
 
@@ -113,17 +147,32 @@ abstract class ParseBase {
 
   /// Sets all the objects variables
   @protected
-  void setObjectData(Map<String, dynamic> objectData) =>
+  void _setObjectData(Map<String, dynamic> objectData) =>
       _objectData = objectData;
 
   /// Returns the objects variables
   @protected
-  Map<String, dynamic> getObjectData() => _objectData ?? Map<String, dynamic>();
+  Map<String, dynamic> _getObjectData() => _objectData ?? Map<String, dynamic>();
+
+  bool containsValue(Object value) {
+    return _getObjectData().containsValue(value);
+  }
 
+  bool containsKey(Object key) {
+    return _getObjectData().containsKey(key);
+  }
+
+  dynamic operator [](Object key) {
+    get<dynamic>(key);
+  }
+
+  void operator []=(String key, dynamic value) {
+    set<dynamic>(key, value);
+  }
   /// Saves in storage
   Future<void> saveInStorage(String key) async {
     final String objectJson = json.encode(toJson(full: true));
-    await ParseCoreData().getStore()
+    ParseCoreData().getStore()
       ..setString(key, objectJson);
   }
 
@@ -134,25 +183,29 @@ abstract class ParseBase {
   /// needed or not, set to false
   void set<T>(String key, T value, {bool forceUpdate = true}) {
     if (value != null) {
-      if (getObjectData().containsKey(key)) {
+      if (_getObjectData().containsKey(key)) {
+        if (_getObjectData()[key] == value) {
+          return;
+        }
         if (forceUpdate) {
-          getObjectData()[key] = value;
+          _getObjectData()[key] = value;
         }
       } else {
-        getObjectData()[key] = value;
+        _getObjectData()[key] = value;
       }
+      _unsavedChanges[key] = value;
     }
   }
 
   ///Set the [ParseACL] governing this object.
   void setACL<ParseACL>(ParseACL acl) {
-    getObjectData()[keyVarAcl] = acl;
+    _getObjectData()[keyVarAcl] = acl;
   }
 
   ///Access the [ParseACL] governing this object.
   ParseACL getACL() {
-    if (getObjectData().containsKey(keyVarAcl)) {
-      return getObjectData()[keyVarAcl];
+    if (_getObjectData().containsKey(keyVarAcl)) {
+      return _getObjectData()[keyVarAcl];
     } else {
       return ParseACL();
     }
@@ -164,12 +217,12 @@ abstract class ParseBase {
   /// getType<int> and an int will be returned, null, or a defaultValue if
   /// provided
   dynamic get<T>(String key, {T defaultValue}) {
-    if (getObjectData().containsKey(key)) {
-      if (T != null && getObjectData()[key] is T) {
-        final T data = getObjectData()[key];
+    if (_getObjectData().containsKey(key)) {
+      if (T != null && _getObjectData()[key] is T) {
+        final T data = _getObjectData()[key];
         return data;
       } else {
-        return getObjectData()[key];
+        return _getObjectData()[key];
       }
     } else {
       return defaultValue;
@@ -184,7 +237,7 @@ abstract class ParseBase {
       await unpin();
       final Map<String, dynamic> objectMap = parseEncode(this, full: true);
       final String json = jsonEncode(objectMap);
-      await ParseCoreData().getStore()
+      ParseCoreData().getStore()
         ..setString(objectId, json);
       return true;
     } else {
@@ -197,7 +250,7 @@ abstract class ParseBase {
   /// Replicates Android SDK pin process and saves object to storage
   Future<bool> unpin({String key}) async {
     if (objectId != null) {
-      await ParseCoreData().getStore()
+      ParseCoreData().getStore()
         ..remove(key ?? objectId);
       return true;
     }
@@ -210,7 +263,7 @@ abstract class ParseBase {
   /// Replicates Android SDK pin process and saves object to storage
   dynamic fromPin(String objectId) async {
     if (objectId != null) {
-      final CoreStore coreStore = await ParseCoreData().getStore();
+      final CoreStore coreStore = ParseCoreData().getStore();
       final String itemFromStore = await coreStore.getString(objectId);
 
       if (itemFromStore != null) {
@@ -220,5 +273,19 @@ abstract class ParseBase {
     return null;
   }
 
-  Map<String, dynamic> toPointer() => encodeObject(className, objectId);
+  Map<String, dynamic> toPointer() => encodeObject(parseClassName, objectId);
+
+  /// Deprecated
+  @Deprecated('Prefer to use parseClassName')
+  String className;
+  @Deprecated('Prefer to use parseClassName')
+  String getClassName() => parseClassName;
+  @Deprecated('Prefer to use parseClassName')
+  String setClassName(String className) => parseClassName = className;
+  @protected @Deprecated('Prefer to use _getObjectData method, or operator [] for certain key.')
+  Map<String, dynamic> getObjectData() => _getObjectData();
+
+  @protected @Deprecated('Prefer to use _setObjectData method, or operator [] for certain key.')
+  void setObjectData(Map<String, dynamic> objectData) =>
+      _setObjectData(objectData);
 }
diff --git a/lib/src/objects/parse_config.dart b/lib/src/objects/parse_config.dart
index 86e3e3292..8f7dedf16 100644
--- a/lib/src/objects/parse_config.dart
+++ b/lib/src/objects/parse_config.dart
@@ -18,9 +18,9 @@ class ParseConfig extends ParseObject {
       final String uri = '${ParseCoreData().serverUrl}/config';
       final Response result = await _client.get(uri);
       return handleResponse<ParseConfig>(
-          this, result, ParseApiRQ.getConfigs, _debug, className);
+          this, result, ParseApiRQ.getConfigs, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.getConfigs, _debug, className);
+      return handleException(e, ParseApiRQ.getConfigs, _debug, parseClassName);
     }
   }
 
@@ -31,9 +31,9 @@ class ParseConfig extends ParseObject {
       final String body = '{\"params\":{\"$key\": \"${parseEncode(value)}\"}}';
       final Response result = await _client.put(uri, body: body);
       return handleResponse<ParseConfig>(
-          this, result, ParseApiRQ.addConfig, _debug, className);
+          this, result, ParseApiRQ.addConfig, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.addConfig, _debug, className);
+      return handleException(e, ParseApiRQ.addConfig, _debug, parseClassName);
     }
   }
 }
diff --git a/lib/src/objects/parse_file.dart b/lib/src/objects/parse_file.dart
index ee93e3f40..7bef32891 100644
--- a/lib/src/objects/parse_file.dart
+++ b/lib/src/objects/parse_file.dart
@@ -102,7 +102,7 @@ class ParseFile extends ParseObject {
           Response(json.encode(response), 201),
           ParseApiRQ.upload,
           _debug,
-          className);
+          parseClassName);
     }
 
     final String ext = path.extension(file.path).replaceAll('.', '');
@@ -120,9 +120,9 @@ class ParseFile extends ParseObject {
         name = map['name'].toString();
       }
       return handleResponse<ParseFile>(
-          this, response, ParseApiRQ.upload, _debug, className);
+          this, response, ParseApiRQ.upload, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.upload, _debug, className);
+      return handleException(e, ParseApiRQ.upload, _debug, parseClassName);
     }
   }
 }
diff --git a/lib/src/objects/parse_function.dart b/lib/src/objects/parse_function.dart
index 8f80d6a3d..d8e9e883f 100644
--- a/lib/src/objects/parse_function.dart
+++ b/lib/src/objects/parse_function.dart
@@ -30,13 +30,13 @@ class ParseCloudFunction extends ParseObject {
       {Map<String, dynamic> parameters, Map<String, dynamic> headers}) async {
     final String uri = '${_client.data.serverUrl}$_path';
     if (parameters != null) {
-      setObjectData(parameters);
+      _setObjectData(parameters);
     }
 
     final Response result =
-    await _client.post(uri, body: json.encode(getObjectData()));
+    await _client.post(uri, body: json.encode(_getObjectData()));
     return handleResponse<ParseCloudFunction>(
-        this, result, ParseApiRQ.execute, _debug, className);
+        this, result, ParseApiRQ.execute, _debug, parseClassName);
   }
 
   /// Executes a cloud function that returns a ParseObject type
@@ -46,11 +46,11 @@ class ParseCloudFunction extends ParseObject {
       {Map<String, dynamic> parameters, Map<String, dynamic> headers}) async {
     final String uri = '${_client.data.serverUrl}$_path';
     if (parameters != null) {
-      setObjectData(parameters);
+      _setObjectData(parameters);
     }
     final Response result =
-        await _client.post(uri, body: json.encode(getObjectData()));
+        await _client.post(uri, body: json.encode(_getObjectData()));
     return handleResponse<T>(
-        this, result, ParseApiRQ.executeObjectionFunction, _debug, className);
+        this, result, ParseApiRQ.executeObjectionFunction, _debug, parseClassName);
   }
 }
diff --git a/lib/src/objects/parse_installation.dart b/lib/src/objects/parse_installation.dart
index 4aa0f5130..4950ba460 100644
--- a/lib/src/objects/parse_installation.dart
+++ b/lib/src/objects/parse_installation.dart
@@ -162,7 +162,7 @@ class ParseInstallation extends ParseObject {
       final String uri = '${_client.data.serverUrl}$keyEndPointInstallations';
       final String body = json.encode(toJson(forApiRQ: true));
       if (_debug) {
-        logRequest(ParseCoreData().appName, className,
+        logRequest(ParseCoreData().appName, parseClassName,
             ParseApiRQ.create.toString(), uri, body);
       }
       final Response result = await _client.post(uri, body: body);
@@ -175,15 +175,15 @@ class ParseInstallation extends ParseObject {
       }
 
       return handleResponse<ParseInstallation>(
-          this, result, ParseApiRQ.create, _debug, className);
+          this, result, ParseApiRQ.create, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.create, _debug, className);
+      return handleException(e, ParseApiRQ.create, _debug, parseClassName);
     }
   }
 
   /// Saves the current object online
   Future<ParseResponse> _save() async {
-    if (getObjectData()[keyVarObjectId] == null) {
+    if (objectId== null) {
       return create();
     } else {
       try {
@@ -191,14 +191,14 @@ class ParseInstallation extends ParseObject {
             '${ParseCoreData().serverUrl}$keyEndPointInstallations/$objectId';
         final String body = json.encode(toJson(forApiRQ: true));
         if (_debug) {
-          logRequest(ParseCoreData().appName, className,
+          logRequest(ParseCoreData().appName, parseClassName,
               ParseApiRQ.save.toString(), uri, body);
         }
         final Response result = await _client.put(uri, body: body);
         return handleResponse<ParseInstallation>(
-            this, result, ParseApiRQ.save, _debug, className);
+            this, result, ParseApiRQ.save, _debug, parseClassName);
       } on Exception catch (e) {
-        return handleException(e, ParseApiRQ.save, _debug, className);
+        return handleException(e, ParseApiRQ.save, _debug, parseClassName);
       }
     }
   }
diff --git a/lib/src/objects/parse_object.dart b/lib/src/objects/parse_object.dart
index 592ae8aa8..d23d6127a 100644
--- a/lib/src/objects/parse_object.dart
+++ b/lib/src/objects/parse_object.dart
@@ -10,7 +10,7 @@ class ParseObject extends ParseBase implements ParseCloneable {
   ParseObject(String className,
       {bool debug, ParseHTTPClient client, bool autoSendSessionId})
       : super() {
-    setClassName(className);
+    parseClassName = className;
     _path = '$keyEndPointClasses$className';
 
     _debug = isDebugEnabled(objectLevelDebug: debug);
@@ -25,7 +25,7 @@ class ParseObject extends ParseBase implements ParseCloneable {
 
   @override
   dynamic clone(Map<String, dynamic> map) =>
-      ParseObject.clone(className)..fromJson(map);
+      ParseObject.clone(parseClassName)..fromJson(map);
 
   String _path;
   bool _debug;
@@ -44,9 +44,9 @@ class ParseObject extends ParseBase implements ParseCloneable {
 
       final Response result = await _client.get(url);
       return handleResponse<ParseObject>(
-          this, result, ParseApiRQ.get, _debug, className);
+          this, result, ParseApiRQ.get, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.get, _debug, className);
+      return handleException(e, ParseApiRQ.get, _debug, parseClassName);
     }
   }
 
@@ -56,9 +56,9 @@ class ParseObject extends ParseBase implements ParseCloneable {
       final Uri url = getSanitisedUri(_client, '$_path');
       final Response result = await _client.get(url);
       return handleResponse<ParseObject>(
-          this, result, ParseApiRQ.getAll, _debug, className);
+          this, result, ParseApiRQ.getAll, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.getAll, _debug, className);
+      return handleException(e, ParseApiRQ.getAll, _debug, parseClassName);
     }
   }
 
@@ -67,12 +67,13 @@ class ParseObject extends ParseBase implements ParseCloneable {
     try {
       final Uri url = getSanitisedUri(_client, '$_path');
       final String body = json.encode(toJson(forApiRQ: true));
+      _saveChanges();
       final Response result = await _client.post(url, body: body);
 
       return handleResponse<ParseObject>(
-          this, result, ParseApiRQ.create, _debug, className);
+          this, result, ParseApiRQ.create, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.create, _debug, className);
+      return handleException(e, ParseApiRQ.create, _debug, parseClassName);
     }
   }
 
@@ -80,26 +81,36 @@ class ParseObject extends ParseBase implements ParseCloneable {
     try {
       final Uri url = getSanitisedUri(_client, '$_path/$objectId');
       final String body = json.encode(toJson(forApiRQ: true));
+      _saveChanges();
       final Response result = await _client.put(url, body: body);
       return handleResponse<ParseObject>(
-          this, result, ParseApiRQ.save, _debug, className);
+          this, result, ParseApiRQ.save, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.save, _debug, className);
+      return handleException(e, ParseApiRQ.save, _debug, parseClassName);
     }
   }
 
   /// Saves the current object online
   Future<ParseResponse> save() async {
-        final ParseResponse response = await _saveChildren(this);
-    if (response.success) {
+    final ParseResponse childrenResponse = await _saveChildren(this);
+    if (childrenResponse.success) {
+      ParseResponse response;
       if (objectId == null) {
-        return create();
-      } else {
-        return update();
+        response = await create();
+      } else if (_isDirty(false)) {
+        response = await update();
+      }
+
+      if (response != null) {
+        if (response.success) {
+          _savingChanges.clear();
+        }
+        else {
+          _revertSavingChanges();
+        }
       }
-    } else {
-      return response;
     }
+    return childrenResponse;
   }
 
   Future<ParseResponse> _saveChildren(dynamic object) async {
@@ -149,15 +160,30 @@ class ParseObject extends ParseBase implements ParseCloneable {
 
       for (List<ParseObject> chunk in chunks) {
         final List<dynamic> requests = chunk.map<dynamic>((ParseObject obj) {
-          return obj.getRequestJson(obj.objectId == null ? 'POST' : 'PUT');
+          return obj._getRequestJson(obj.objectId == null ? 'POST' : 'PUT');
         }).toList();
+        chunk.forEach((ParseObject obj) {
+          obj._saveChanges();
+        });
         final ParseResponse response = await batchRequest(requests, chunk);
         totalResponse.success &= response.success;
         if (response.success) {
           totalResponse.results.addAll(response.results);
           totalResponse.count += response.count;
+          for (int i = 0; i < response.count; i++) {
+            if (response.results[i] is ParseError) {
+              // Batch request succeed, but part of batch failed.
+              chunk[i]._revertSavingChanges();
+            }
+            else {
+              chunk[i]._savingChanges.clear();
+            }
+          }
         } else {
-          // TODO(yulingtianxia): If there was an error, we want to roll forward the save changes before rethrowing.
+          // If there was an error, we want to roll forward the save changes before rethrowing.
+          chunk.forEach((ParseObject obj) {
+            obj._revertSavingChanges();
+          });
           totalResponse.statusCode = response.statusCode;
           totalResponse.error = response.error;
         }
@@ -167,7 +193,19 @@ class ParseObject extends ParseBase implements ParseCloneable {
     return totalResponse;
   }
 
-  dynamic getRequestJson(String method) {
+  void _saveChanges() {
+    _savingChanges.clear();
+    _savingChanges.addAll(_unsavedChanges);
+    _unsavedChanges.clear();
+  }
+
+  void _revertSavingChanges() {
+    _savingChanges.addAll(_unsavedChanges);
+    _unsavedChanges.addAll(_savingChanges);
+    _savingChanges.clear();
+  }
+
+  dynamic _getRequestJson(String method) {
     final Uri tempUri = Uri.parse(_client.data.serverUrl);
     final String parsePath = tempUri.path;
     final dynamic request = <String, dynamic>{
@@ -197,15 +235,19 @@ class ParseObject extends ParseBase implements ParseCloneable {
           }
         }
       }
-    } else if (!_canbeSerialized(aftersaving, value: getObjectData())) {
+    } else if (!_canbeSerialized(aftersaving, value: _getObjectData())) {
       return false;
     }
     // TODO(yulingtianxia): handle ACL
     return true;
   }
 
-  bool _collectionDirtyChildren(dynamic object, Set<ParseObject> uniqueObjects,
-      Set<ParseFile> uniqueFiles, Set<ParseObject> seen, Set<ParseObject> seenNew) {
+  bool _collectionDirtyChildren(
+      dynamic object,
+      Set<ParseObject> uniqueObjects,
+      Set<ParseFile> uniqueFiles,
+      Set<ParseObject> seen,
+      Set<ParseObject> seenNew) {
     if (object is List) {
       for (dynamic child in object) {
         if (!_collectionDirtyChildren(
@@ -248,12 +290,13 @@ class ParseObject extends ParseBase implements ParseCloneable {
       seen.add(object);
 
       if (!_collectionDirtyChildren(
-          object.getObjectData(), uniqueObjects, uniqueFiles, seen, seenNew)) {
+          object._getObjectData(), uniqueObjects, uniqueFiles, seen, seenNew)) {
         return false;
       }
 
-      // TODO(yulingtianxia): Check Dirty
-      uniqueObjects.add(object);
+      if (object._isDirty(false)) {
+        uniqueObjects.add(object);
+      }
     }
     return true;
   }
@@ -321,6 +364,7 @@ class ParseObject extends ParseBase implements ParseCloneable {
   void setAddUnique(String key, dynamic value) {
     _arrayOperation('AddUnique', key, <dynamic>[value]);
   }
+
   /// Add a multiple elements to an array of an object
   void setAddAllUnique(String key, List<dynamic> values) {
     _arrayOperation('AddUnique', key, values);
@@ -359,12 +403,12 @@ class ParseObject extends ParseBase implements ParseCloneable {
             '{\"$key\":{\"__op\":\"$arrayAction\",\"objects\":${json.encode(parseEncode(values))}}}';
         final Response result = await _client.put(url, body: body);
         return handleResponse<ParseObject>(
-            this, result, apiRQType, _debug, className);
+            this, result, apiRQType, _debug, parseClassName);
       } else {
         return null;
       }
     } on Exception catch (e) {
-      return handleException(e, apiRQType, _debug, className);
+      return handleException(e, apiRQType, _debug, parseClassName);
     }
   }
 
@@ -417,12 +461,12 @@ class ParseObject extends ParseBase implements ParseCloneable {
             '{\"$key\":{\"__op\":\"$countAction\",\"amount\":$amount}}';
         final Response result = await _client.put(url, body: body);
         return handleResponse<ParseObject>(
-            this, result, apiRQType, _debug, className);
+            this, result, apiRQType, _debug, parseClassName);
       } else {
         return null;
       }
     } on Exception catch (e) {
-      return handleException(e, apiRQType, _debug, className);
+      return handleException(e, apiRQType, _debug, parseClassName);
     }
   }
 
@@ -432,9 +476,9 @@ class ParseObject extends ParseBase implements ParseCloneable {
       final Uri url = getSanitisedUri(_client, '$_path', query: query);
       final Response result = await _client.get(url);
       return handleResponse<ParseObject>(
-          this, result, ParseApiRQ.query, _debug, className);
+          this, result, ParseApiRQ.query, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.query, _debug, className);
+      return handleException(e, ParseApiRQ.query, _debug, parseClassName);
     }
   }
 
@@ -446,9 +490,9 @@ class ParseObject extends ParseBase implements ParseCloneable {
       final Uri url = getSanitisedUri(_client, '$_path/$id');
       final Response result = await _client.delete(url);
       return handleResponse<ParseObject>(
-          this, result, ParseApiRQ.delete, _debug, className);
+          this, result, ParseApiRQ.delete, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.delete, _debug, className);
+      return handleException(e, ParseApiRQ.delete, _debug, parseClassName);
     }
   }
 }
diff --git a/lib/src/objects/parse_relation.dart b/lib/src/objects/parse_relation.dart
index 50aa8584e..307e244ca 100644
--- a/lib/src/objects/parse_relation.dart
+++ b/lib/src/objects/parse_relation.dart
@@ -18,7 +18,7 @@ class ParseRelation<T extends ParseObject> {
   
   void add(T object) {
     if (object != null) {
-      _targetClass = object.getClassName();
+      _targetClass = object.parseClassName;
       _objects.add(object);
       _parent.addRelation(_key, _objects.toList());
     }
@@ -26,14 +26,14 @@ class ParseRelation<T extends ParseObject> {
 
   void remove(T object) {
     if (object != null) {
-      _targetClass = object.getClassName();
+      _targetClass = object.parseClassName;
       _objects.remove(object);
       _parent.removeRelation(_key, _objects.toList());
     }
   }
 
   Map<String, dynamic> toJson() =>
-      <String, String>{'__type': keyRelation, 'className': _objects?.first?.className, 'objects': parseEncode(_objects?.toList())};
+      <String, String>{'__type': keyRelation, 'className': _objects?.first?.parseClassName, 'objects': parseEncode(_objects?.toList())};
 
   ParseRelation<T> fromJson(Map<String, dynamic> map) => ParseRelation<T>()
                                                       .._objects = parseDecode(map['objects'])
diff --git a/lib/src/objects/parse_session.dart b/lib/src/objects/parse_session.dart
index 61f20ba2f..642b89129 100644
--- a/lib/src/objects/parse_session.dart
+++ b/lib/src/objects/parse_session.dart
@@ -39,9 +39,9 @@ class ParseSession extends ParseObject implements ParseCloneable {
       final Response response = await _client.get(url);
 
       return handleResponse<ParseSession>(
-          this, response, ParseApiRQ.logout, _debug, className);
+          this, response, ParseApiRQ.logout, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.logout, _debug, className);
+      return handleException(e, ParseApiRQ.logout, _debug, parseClassName);
     }
   }
 }
diff --git a/lib/src/objects/parse_user.dart b/lib/src/objects/parse_user.dart
index 67a4adc3f..fec62403c 100644
--- a/lib/src/objects/parse_user.dart
+++ b/lib/src/objects/parse_user.dart
@@ -26,10 +26,14 @@ class ParseUser extends ParseObject implements ParseCloneable {
     this.sessionToken = sessionToken;
   }
 
+  ParseUser.forQuery() : super(keyClassUser);
+
   ParseUser.clone(Map<String, dynamic> map)
       : this(map[keyVarUsername], map[keyVarPassword], map[keyVarEmail]);
 
-  ParseUser.forQuery() : super(keyClassUser);
+  @override
+  dynamic clone(Map<String, dynamic> map) =>
+      ParseUser.clone(map)..fromJson(map);
 
   static const String keyEmailVerified = 'emailVerified';
   static const String keyUsername = 'username';
@@ -96,10 +100,10 @@ class ParseUser extends ParseObject implements ParseCloneable {
       final Uri url = getSanitisedUri(_client, '$keyEndPointUserName');
       final Response response = await _client.get(url, headers: headers);
       return _handleResponse(_getEmptyUser(), response, ParseApiRQ.currentUser,
-          _debug, _getEmptyUser().className);
+          _debug, _getEmptyUser().parseClassName);
     } on Exception catch (e) {
       return handleException(
-          e, ParseApiRQ.currentUser, _debug, _getEmptyUser().className);
+          e, ParseApiRQ.currentUser, _debug, _getEmptyUser().parseClassName);
     }
   }
 
@@ -138,9 +142,9 @@ class ParseUser extends ParseObject implements ParseCloneable {
           body: json.encode(bodyData));
 
       return _handleResponse(
-          this, response, ParseApiRQ.signUp, _debug, className);
+          this, response, ParseApiRQ.signUp, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.signUp, _debug, className);
+      return handleException(e, ParseApiRQ.signUp, _debug, parseClassName);
     }
   }
 
@@ -164,9 +168,9 @@ class ParseUser extends ParseObject implements ParseCloneable {
       });
 
       return _handleResponse(
-          this, response, ParseApiRQ.login, _debug, className);
+          this, response, ParseApiRQ.login, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.login, _debug, className);
+      return handleException(e, ParseApiRQ.login, _debug, parseClassName);
     }
   }
 
@@ -187,9 +191,9 @@ class ParseUser extends ParseObject implements ParseCloneable {
           }));
 
       return _handleResponse(
-          this, response, ParseApiRQ.loginAnonymous, _debug, className);
+          this, response, ParseApiRQ.loginAnonymous, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.loginAnonymous, _debug, className);
+      return handleException(e, ParseApiRQ.loginAnonymous, _debug, parseClassName);
     }
   }
 
@@ -213,9 +217,9 @@ class ParseUser extends ParseObject implements ParseCloneable {
           }));
 
       return _handleResponse(
-          this, response, ParseApiRQ.loginWith, _debug, className);
+          this, response, ParseApiRQ.loginWith, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.loginWith, _debug, className);
+      return handleException(e, ParseApiRQ.loginWith, _debug, parseClassName);
     }
   }
 
@@ -230,7 +234,7 @@ class ParseUser extends ParseObject implements ParseCloneable {
 
     if (deleteLocalUserData == true) {
       unpin(key: keyParseStoreUser);
-      setObjectData(null);
+      _setObjectData(null);
     }
 
     try {
@@ -239,9 +243,9 @@ class ParseUser extends ParseObject implements ParseCloneable {
           headers: <String, String>{keyHeaderSessionToken: sessionId});
 
       return _handleResponse(
-          this, response, ParseApiRQ.logout, _debug, className);
+          this, response, ParseApiRQ.logout, _debug, parseClassName);
     } on Exception catch (e) {
-      return handleException(e, ParseApiRQ.logout, _debug, className);
+      return handleException(e, ParseApiRQ.logout, _debug, parseClassName);
     }
   }
 
@@ -252,10 +256,10 @@ class ParseUser extends ParseObject implements ParseCloneable {
           '${_client.data.serverUrl}$keyEndPointVerificationEmail',
           body: json.encode(<String, dynamic>{keyVarEmail: emailAddress}));
       return _handleResponse(this, response,
-          ParseApiRQ.verificationEmailRequest, _debug, className);
+          ParseApiRQ.verificationEmailRequest, _debug, parseClassName);
     } on Exception catch (e) {
       return handleException(
-          e, ParseApiRQ.verificationEmailRequest, _debug, className);
+          e, ParseApiRQ.verificationEmailRequest, _debug, parseClassName);
     }
   }
 
@@ -266,10 +270,10 @@ class ParseUser extends ParseObject implements ParseCloneable {
           '${_client.data.serverUrl}$keyEndPointRequestPasswordReset',
           body: json.encode(<String, dynamic>{keyVarEmail: emailAddress}));
       return _handleResponse(
-          this, response, ParseApiRQ.requestPasswordReset, _debug, className);
+          this, response, ParseApiRQ.requestPasswordReset, _debug, parseClassName);
     } on Exception catch (e) {
       return handleException(
-          e, ParseApiRQ.requestPasswordReset, _debug, className);
+          e, ParseApiRQ.requestPasswordReset, _debug, parseClassName);
     }
   }
 
@@ -293,9 +297,9 @@ class ParseUser extends ParseObject implements ParseCloneable {
         final Uri url = getSanitisedUri(_client, '$_path/$objectId');
         final Response response = await _client.delete(url);
         return _handleResponse(
-            this, response, ParseApiRQ.destroy, _debug, className);
+            this, response, ParseApiRQ.destroy, _debug, parseClassName);
       } on Exception catch (e) {
-        return handleException(e, ParseApiRQ.destroy, _debug, className);
+        return handleException(e, ParseApiRQ.destroy, _debug, parseClassName);
       }
     }
 
diff --git a/lib/src/objects/response/parse_response_builder.dart b/lib/src/objects/response/parse_response_builder.dart
index 1a783eba9..782de2673 100644
--- a/lib/src/objects/response/parse_response_builder.dart
+++ b/lib/src/objects/response/parse_response_builder.dart
@@ -74,10 +74,13 @@ class _ParseResponseBuilder {
         for (int i = 0; i < object.length; i++) {
           final Map<String, dynamic> objectResult = list[i];
           if (objectResult.containsKey('success')) {
-            final T item = _handleSingleResult<T>(object[i], objectResult['success'], false);
+            final T item = _handleSingleResult<T>(
+                object[i], objectResult['success'], false);
             response.results.add(item);
           } else {
-            final ParseError error = ParseError(code: objectResult[keyCode], message: objectResult[keyError].toString());
+            final ParseError error = ParseError(
+                code: objectResult[keyCode],
+                message: objectResult[keyError].toString());
             response.results.add(error);
           }
         }
@@ -109,12 +112,11 @@ class _ParseResponseBuilder {
   }
 
   /// Handles a response with a multiple result object
-  List<T> _handleMultipleResults<T>(dynamic object, List<dynamic> data) {
+  List<T> _handleMultipleResults<T>(T object, List<dynamic> data) {
     final List<T> resultsList = List<T>();
     for (dynamic value in data) {
       resultsList.add(_handleSingleResult<T>(object, value, true));
     }
-
     return resultsList;
   }
 
@@ -124,7 +126,19 @@ class _ParseResponseBuilder {
     if (createNewObject && object is ParseCloneable) {
       return object.clone(map);
     } else if (object is ParseObject) {
-      return object..fromJson(map);
+      // Merge unsaved changes and response.
+      final Map<String, dynamic> unsaved = Map<String, dynamic>();
+      unsaved.addAll(object._unsavedChanges);
+      unsaved.forEach((String k, dynamic v) {
+        if (map[k] != null && map[k] != v) {
+          // Changes after save & before response. Keep it.
+          map.remove(k);
+        }
+      });
+      return object
+        ..fromJson(map)
+        .._unsavedChanges.clear()
+        .._unsavedChanges.addAll(unsaved);
     } else {
       return null;
     }
@@ -133,4 +147,4 @@ class _ParseResponseBuilder {
   bool isHealthCheck(Response apiResponse) {
     return apiResponse.body == '{\"status\":\"ok\"}';
   }
-}
\ No newline at end of file
+}