* ObjectControllerTests.cs: chore: 支持 FetchWhenSave

* AVObject.cs:
* AVObjectController.cs:

Storage/Storage.Test/ObjectControllerTests.cs

@@ -24,12 +24,12 @@ namespace LeanCloudTests {
         }
 
         [Test]
-        public async Task SaveWithQuery() {
+        public async Task SaveWithOptions() {
             AVObject account = AVObject.CreateWithoutData("Account", "5d65fa5330863b008065e476");
             AVQuery<AVObject> query = new AVQuery<AVObject>("Account");
             query.WhereGreaterThan("balance", 80);
             account["balance"] = 50;
-            await account.SaveAsync(query);
+            await account.SaveAsync(true, query);
             TestContext.Out.WriteLine($"balance: {account["balance"]}");
         }
 

Storage/Storage/Internal/Object/Controller/AVObjectController.cs

@@ -35,6 +35,7 @@ namespace LeanCloud.Storage.Internal {
 
         public Task<IObjectState> SaveAsync(IObjectState state,
             IDictionary<string, IAVFieldOperation> operations,
+            bool fetchWhenSave,
             AVQuery<AVObject> query,
             string sessionToken,
             CancellationToken cancellationToken) {
@@ -45,12 +46,16 @@ namespace LeanCloud.Storage.Internal {
                 Method = state.ObjectId == null ? HttpMethod.Post : HttpMethod.Put,
                 Content = objectJSON
             };
+            Dictionary<string, object> args = new Dictionary<string, object>();
+            if (fetchWhenSave) {
+                args.Add("fetchWhenSave", fetchWhenSave);
+            }
             // 查询条件
             if (query != null && query.where != null) {
-                Dictionary<string, object> where = new Dictionary<string, object> {
-                    { "where", PointerOrLocalIdEncoder.Instance.Encode(query.where) }
-                };
-                string encode = AVClient.BuildQueryString(where);
+                args.Add("where", PointerOrLocalIdEncoder.Instance.Encode(query.where));
+            }
+            if (args.Count > 0) {
+                string encode = AVClient.BuildQueryString(args);
                 command.Path = $"{command.Path}?{encode}";
             }
             return AVPlugins.Instance.CommandRunner.RunCommandAsync<IDictionary<string, object>>(command, cancellationToken: cancellationToken).OnSuccess(t => {

Storage/Storage/Public/AVObject.cs

@@ -557,7 +557,7 @@ string propertyName
             }
         }
 
-        public virtual Task SaveAsync(AVQuery<AVObject> query = null, CancellationToken cancellationToken = default) {
+        public virtual Task SaveAsync(bool fetchWhenSave = false, AVQuery<AVObject> query = null, CancellationToken cancellationToken = default) {
             IDictionary<string, IAVFieldOperation> currentOperations = null;
             if (!IsDirty) {
                 return Task.FromResult(0);
@@ -577,6 +577,7 @@ string propertyName
             return deepSaveTask.OnSuccess(_ => {
                 return ObjectController.SaveAsync(state,
                     currentOperations,
+                    FetchWhenSave || fetchWhenSave,
                     query,
                     sessionToken,
                     cancellationToken);
@@ -1501,6 +1502,10 @@ string propertyName
             }
         }
 
+        public bool FetchWhenSave {
+            get; set;
+        }
+
         /// <summary>
         /// Indicates whether this AVObject has unsaved changes.
         /// </summary>