fix #2764 (#2782)

Author: Mpdreamz

src/Nest/Document/Single/Update/UpdateRequest.cs

@@ -18,6 +18,13 @@ public partial interface IUpdateRequest<TDocument, TPartialDocument>
 		[JsonProperty(PropertyName = "doc_as_upsert")]
 		bool? DocAsUpsert { get; set; }
 
+		/// <summary>
+		/// If you would like your script to run regardless of whether the document exists or not — i.e. the script handles
+		/// initializing the document instead of the upsert element — then set scripted_upsert to true
+		/// </summary>
+		[JsonProperty(PropertyName = "scripted_upsert")]
+		bool? ScriptedUpsert { get; set; }
+
 		[JsonProperty(PropertyName = "doc")]
 		TPartialDocument Doc { get; set; }
 
@@ -29,12 +36,20 @@ public partial class UpdateRequest<TDocument, TPartialDocument>
 		where TDocument : class
 		where TPartialDocument : class
 	{
+		/// <inheritdoc/>
 		public IScript Script { get; set; }
+		/// <inheritdoc/>
 		public TDocument Upsert { get; set; }
+		/// <inheritdoc/>
 		public bool? DocAsUpsert { get; set; }
+		/// <inheritdoc/>
 		public TPartialDocument Doc { get; set; }
+		/// <inheritdoc/>
 		public bool? DetectNoop { get; set; }
+		/// <inheritdoc/>
+		public bool? ScriptedUpsert { get; set; }
 
+		/// <inheritdoc/>
 		public Fields Fields
 		{
 			get { return Self.RequestParameters.GetQueryStringValue<Fields>("fields"); }
@@ -56,6 +71,8 @@ public partial class UpdateDescriptor<TDocument, TPartialDocument>
 
 		bool? IUpdateRequest<TDocument, TPartialDocument>.DetectNoop { get; set; }
 
+		bool? IUpdateRequest<TDocument, TPartialDocument>.ScriptedUpsert { get; set; }
+
 		/// <summary>
 		/// The full document to be created if an existing document does not exist for a partial merge.
 		/// </summary>
@@ -70,6 +87,8 @@ public partial class UpdateDescriptor<TDocument, TPartialDocument>
 
 		public UpdateDescriptor<TDocument, TPartialDocument> DetectNoop(bool detectNoop = true) => Assign(a => a.DetectNoop = detectNoop);
 
+		public UpdateDescriptor<TDocument, TPartialDocument> ScriptedUpsert(bool scriptedUpsert = true) => Assign(a => a.ScriptedUpsert = scriptedUpsert);
+
 		public UpdateDescriptor<TDocument, TPartialDocument> Script(Func<ScriptDescriptor, IScript> scriptSelector) =>
 			Assign(a => a.Script = scriptSelector?.Invoke(new ScriptDescriptor()));
 

src/Tests/Document/Single/Update/UpdateWithScriptApiTests.cs

@@ -40,6 +40,7 @@ protected override LazyResponses ClientUsage() => Calls(
 
 		protected override object ExpectJson { get; } = new
 		{
+			scripted_upsert = true,
 			script = new
 			{
 				inline = "ctx._source.name = \"params.name\"",
@@ -53,7 +54,8 @@ protected override LazyResponses ClientUsage() => Calls(
 		protected override UpdateDescriptor<Project, Project> NewDescriptor() => new UpdateDescriptor<Project, Project>(DocumentPath<Project>.Id(CallIsolatedValue));
 
 		protected override Func<UpdateDescriptor<Project, Project>, IUpdateRequest<Project, Project>> Fluent => d => d
-			 .Script(s => s
+			.ScriptedUpsert()
+			.Script(s => s
 				.Inline("ctx._source.name = \"params.name\"")
 				.Lang("painless")
 				.Params(p => p
@@ -63,6 +65,7 @@ protected override LazyResponses ClientUsage() => Calls(
 
 		protected override UpdateRequest<Project, Project> Initializer => new UpdateRequest<Project, Project>(CallIsolatedValue)
 		{
+			ScriptedUpsert = true,
 			Script = new InlineScript("ctx._source.name = \"params.name\"")
 			{
 				Lang = "painless",