[ Fix ] fixed the non resulted n field of image variation method

example/lib/image_variation_example.dart

@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import 'package:dart_openai/dart_openai.dart';
 
 import 'env/env.dart';
@@ -7,9 +9,10 @@ Future<void> main() async {
   OpenAI.apiKey = Env.apiKey;
 
   // Creates the Image Variation
-  final variation = await OpenAI.instance.image.create(
-    prompt: "Tree with blue butterflies wings",
-    n: 2,
+  final variation = await OpenAI.instance.image.variation(
+    model: "dall-e-2",
+    image: File("dart.png"),
+    n: 4,
   );
 
   // Prints the result.

lib/src/core/networking/client.dart

@@ -280,6 +280,8 @@ abstract class OpenAINetworkingClient {
           String respondData = "";
           stream.where((event) => event.isNotEmpty).listen(
             (value) {
+              print(value);
+
               final data = value;
               respondData += data;
 
@@ -407,7 +409,7 @@ abstract class OpenAINetworkingClient {
     required String to,
     required T Function(Map<String, dynamic>) onSuccess,
     // ignore: avoid-unused-parameters
-    required Map<String, dynamic> body,
+    required Map<String, String> body,
     required File image,
   }) async {
     OpenAILogger.logStartRequest(to);
@@ -420,6 +422,7 @@ abstract class OpenAINetworkingClient {
 
     final imageFile = await http.MultipartFile.fromPath("image", image.path);
 
+    request.fields.addAll(body);
     request.files.add(imageFile);
 
     final http.StreamedResponse response = await request.send();

lib/src/instance/images/images.dart

@@ -107,6 +107,9 @@ interface class OpenAIImages implements OpenAIImagesBase {
 
   /// Creates an edited or extended image given an original image and a prompt.
   ///
+  /// [model] is the model to use for generating the image.
+  ///
+  ///
   /// [image] to edit. Must be a valid PNG file, less than 4MB, and square. If mask is not provided, image must have transparency, which will be used as the mask.
   ///
   ///
@@ -146,6 +149,7 @@ interface class OpenAIImages implements OpenAIImagesBase {
   ///```
   @override
   Future<OpenAiImageEditModel> edit({
+    String? model,
     required File image,
     File? mask,
     required String prompt,
@@ -155,10 +159,12 @@ interface class OpenAIImages implements OpenAIImagesBase {
     String? user,
   }) async {
     final String edit = "/edits";
+
     return await OpenAINetworkingClient.imageEditForm<OpenAiImageEditModel>(
       image: image,
       mask: mask,
       body: {
+        if (model != null) "model": model,
         "prompt": prompt,
         if (n != null) "n": n.toString(),
         if (size != null) "size": size.value,
@@ -175,6 +181,9 @@ interface class OpenAIImages implements OpenAIImagesBase {
   /// Creates a variation of a given image.
   ///
   ///
+  /// [model] is the model to use for generating the image.
+  ///
+  ///
   /// [image] to use as the basis for the variation(s). Must be a valid PNG file, less than 4MB, and square.
   ///
   ///
@@ -206,6 +215,7 @@ interface class OpenAIImages implements OpenAIImagesBase {
   /// ```
   @override
   Future<OpenAIImageVariationModel> variation({
+    String? model,
     required File image,
     int? n,
     OpenAIImageSize? size,
@@ -218,7 +228,8 @@ interface class OpenAIImages implements OpenAIImagesBase {
         OpenAIImageVariationModel>(
       image: image,
       body: {
-        if (n != null) "n": n,
+        if (model != null) "model": model,
+        if (n != null) "n": n.toString(),
         if (size != null) "size": size.value,
         if (responseFormat != null) "response_format": responseFormat.value,
         if (user != null) "user": user,