diff --git a/.gitignore b/.gitignore
index 962edde..e6f4c44 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 .metadata
 .pub/
 .vscode/
+.vscode/**/*.json
 .idea/
 
 build/
diff --git a/.pubignore b/.pubignore
index 962edde..e6f4c44 100644
--- a/.pubignore
+++ b/.pubignore
@@ -5,6 +5,7 @@
 .metadata
 .pub/
 .vscode/
+.vscode/**/*.json
 .idea/
 
 build/
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3803ea7..f0bdd18 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,10 @@
       ),
     ]);
   ```
+- [Added] `deleteObjects` Delete by query: now you can delete objects based on your query. 
+- [Bug] `addObject` for add object without `objectID` has been fixed.
+- [Bug] `setData` for set object data has been fixed [Issue #52](https://github.com/knoxpo/dart_algolia/issues/52)
+- [Bug] `partialUpdateObject` for partial update object data has been fixed [Issue #59](https://github.com/knoxpo/dart_algolia/issues/59)
 ## 1.0.3
 ### Bug fixes
 
diff --git a/lib/src/error.dart b/lib/src/error.dart
index 9ac41ac..8be6cd1 100644
--- a/lib/src/error.dart
+++ b/lib/src/error.dart
@@ -11,4 +11,8 @@ class AlgoliaError {
   Map get error => _message;
 
   int get statusCode => _statusCode;
+
+  @override
+  String toString() =>
+      'AlgoliaError(_message: $_message, _statusCode: $_statusCode)';
 }
diff --git a/lib/src/index_reference.dart b/lib/src/index_reference.dart
index cbdd725..5cf51de 100644
--- a/lib/src/index_reference.dart
+++ b/lib/src/index_reference.dart
@@ -21,7 +21,6 @@ class AlgoliaIndexReference extends AlgoliaQuery {
   /// ID of the referenced index.
   ///
   String get index => _index;
-  String get encodedIndex => Uri.encodeFull(_index);
 
   ///
   /// **Settings**
@@ -146,8 +145,22 @@ class AlgoliaIndexReference extends AlgoliaQuery {
   /// so that the resulting list will be chronologically-sorted.
   ///
   Future<AlgoliaTask> addObject(Map<String, dynamic> data) async {
-    final newDocument = object();
-    return await newDocument.setData(data);
+    if (data['objectID'] != null) {
+      final newDocument = object();
+      return await newDocument.setData(data);
+    }
+    var response = await algolia._apiCall(
+      ApiRequestType.post,
+      'indexes/$encodedIndex',
+      data: data,
+    );
+    Map<String, dynamic> body = json.decode(response.body);
+
+    if (!(response.statusCode >= 200 && response.statusCode < 300)) {
+      throw AlgoliaError._(body, response.statusCode);
+    }
+
+    return AlgoliaTask._(algolia, _index, body);
   }
 
   ///
diff --git a/lib/src/object_reference.dart b/lib/src/object_reference.dart
index b5d62c9..5474f02 100644
--- a/lib/src/object_reference.dart
+++ b/lib/src/object_reference.dart
@@ -46,8 +46,13 @@ class AlgoliaObjectReference {
     if (_objectId != null) {
       url += '/$encodedObjectID';
     }
+    if (data['objectID'] != null && _objectId == null) {
+      url += "/${Uri.encodeFull(data['objectID'])}";
+    } else if (data['objectID'] != null) {
+      data.remove('objectID');
+    }
     var response = await algolia._apiCall(
-      ApiRequestType.post,
+      ApiRequestType.put,
       url,
       data: data,
     );
@@ -121,7 +126,7 @@ class AlgoliaObjectReference {
     data['objectID'] = _objectId;
     data['createIfNotExists'] = createIfNotExists;
     var response = await algolia._apiCall(
-      ApiRequestType.put,
+      ApiRequestType.post,
       url,
       data: data,
     );
diff --git a/lib/src/query.dart b/lib/src/query.dart
index d99f47e..b6c6114 100644
--- a/lib/src/query.dart
+++ b/lib/src/query.dart
@@ -31,6 +31,7 @@ class AlgoliaQuery {
   final Map<String, dynamic> _parameters;
 
   Map<String, dynamic> get parameters => _parameters;
+  String get encodedIndex => Uri.encodeFull(_index);
 
   AlgoliaQuery _copyWithParameters(Map<String, dynamic> parameters) {
     return AlgoliaQuery._(
@@ -49,7 +50,7 @@ class AlgoliaQuery {
   String toString() {
     return {
       'url': '${algolia._host}indexes' +
-          (_index.isNotEmpty ? '/' + Uri.encodeFull(_index) : ''),
+          (encodedIndex.isNotEmpty ? '/' + encodedIndex : ''),
       'headers': algolia._headers,
       'parameters': _parameters,
     }.toString();
@@ -75,7 +76,38 @@ class AlgoliaQuery {
     }
     var response = await algolia._apiCall(
       ApiRequestType.post,
-      'indexes/$_index/query',
+      'indexes/$encodedIndex/query',
+      data: _parameters,
+    );
+    Map<String, dynamic> body = json.decode(response.body);
+    if (!(response.statusCode >= 200 && response.statusCode < 300)) {
+      throw AlgoliaError._(body, response.statusCode);
+    }
+
+    return AlgoliaQuerySnapshot._(algolia, _index, body);
+  }
+
+  ///
+  /// **DeleteObjects**
+  ///
+  /// This will execute the query and retrieve data from Algolia with [AlgoliaQuerySnapshot]
+  /// response.
+  ///
+  Future<AlgoliaQuerySnapshot> deleteObjects() async {
+    if (_parameters.containsKey('minimumAroundRadius')) {
+      assert(
+          (_parameters.containsKey('aroundLatLng') ||
+              _parameters.containsKey('aroundLatLngViaIP')),
+          'This setting only works within the context of a circular geo search, enabled by `aroundLatLng` or `aroundLatLngViaIP`.');
+    }
+    if (_parameters['attributesToRetrieve'] == null) {
+      _copyWithParameters(<String, dynamic>{
+        'attributesToRetrieve': const ['*']
+      });
+    }
+    var response = await algolia._apiCall(
+      ApiRequestType.post,
+      'indexes/$encodedIndex/deleteByQuery',
       data: _parameters,
     );
     Map<String, dynamic> body = json.decode(response.body);
diff --git a/test/algolia_test.dart b/test/algolia_test.dart
index 0263e43..00bf876 100644
--- a/test/algolia_test.dart
+++ b/test/algolia_test.dart
@@ -1497,8 +1497,15 @@ void main() async {
         'modifiedAt': DateTime.now(),
         'price': 200,
       };
-      taskAdded = await algolia.instance.index('contacts').addObject(addData);
-      await taskAdded.waitTask();
+      try {
+        taskAdded = await algolia.instance.index('contacts').addObject(addData);
+        // taskAdded = await algolia.instance.index('contacts').object('1').setData(addData);
+        await taskAdded.waitTask();
+      } on AlgoliaError catch (err) {
+        print(err.toString());
+        print(err.statusCode);
+        print(err.error);
+      }
 
       // Checking if has [AlgoliaTask]
       expect(taskAdded.runtimeType, AlgoliaTask);