Fixes #1494: Enable DeltaSet<T> for minimal API parameter binding

sample/ODataMiniApi/CustomersAndOrders.http

@@ -90,3 +90,43 @@ Content-Type: application/json
 }
 
 ###
+
+# The following is the test case for patch deltaset (changes) to an entity set.
+# You will get the following response:
+#
+#{
+#  "@odata.context": "http://localhost:5177/$metadata#Edm.String",
+#  "value": "Patch : '4' to customers"
+#}
+
+PATCH {{ODataMiniApi_HostAddress}}/v1/customers
+Content-Type: application/json 
+
+{
+  "@odata.context":"http://localhost/v1/$metadata#Customers/$delta",
+  "value":[
+   {
+      "@odata.id":"Customers(42)",
+      "Name":"Microsoft"
+   },
+   {
+      "@odata.context":"http://localhost/v1/$metadata#Customers/$deletedLink",
+      "source":"Customers(32)",
+      "relationship":"Orders",
+      "target":"Orders(12)"
+   },
+   {
+      "@odata.context":"http://localhost/v1/$metadata#Customers/$link",
+      "source":"Customers(22)",
+      "relationship":"Orders",
+      "target":"Orders(2)"
+   },
+   {
+      "@odata.context":"http://localhost/v1/$metadata#Customers/$deletedEntity",
+      "id":"Customers(12)",
+      "reason":"deleted"
+   }
+  ]
+}
+
+###

sample/ODataMiniApi/Endpoints/CustomersEndpoints.cs

@@ -159,6 +159,20 @@ public static IEndpointRouteBuilder MapCustomersEndpoints(this IEndpointRouteBui
                         new OperationSegment(action, null)
                         );
                 });
+
+        // DeltaSet<T>
+        app.MapPatch("v1/customers", (AppDb db, DeltaSet<Customer> changes) =>
+        {
+            return $"Patch : '{changes.Count}' to customers";
+        })
+            .WithODataResult()
+            .WithODataModel(model)
+            .WithODataPathFactory(
+                (h, t) =>
+                {
+                    IEdmEntitySet customers = model.FindDeclaredEntitySet("Customers");
+                    return new ODataPath(new EntitySetSegment(customers));
+                });
         return app;
     }
 

src/Microsoft.AspNetCore.OData/Deltas/DeltaSetOfT.cs

@@ -8,7 +8,11 @@
 using System;
 using System.Collections.ObjectModel;
 using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.OData.Abstracts;
+using Microsoft.AspNetCore.OData.Extensions;
 
 namespace Microsoft.AspNetCore.OData.Deltas;
 
@@ -29,6 +33,17 @@ public class DeltaSet<T> : Collection<IDeltaSetItem>, IDeltaSet, ITypedDelta whe
     /// </summary>
     public Type ExpectedClrType => typeof(T);
 
+    /// <summary>
+    /// Binds the <see cref="HttpContext"/> and <see cref="ParameterInfo"/> to generate the <see cref="DeltaSet{T}"/>.
+    /// </summary>
+    /// <param name="context">The HttpContext.</param>
+    /// <param name="parameter">The parameter info.</param>
+    /// <returns>The built <see cref="DeltaSet{T}"/></returns>
+    public static async ValueTask<DeltaSet<T>> BindAsync(HttpContext context, ParameterInfo parameter)
+    {
+        return await context.BindODataParameterAsync<DeltaSet<T>>(parameter);
+    }
+
     #region Exclude unfinished APIs
 #if false
     /// <summary>
@@ -100,5 +115,5 @@ protected virtual T GetOriginal(IDeltaSetItem deltaItem, IEnumerable originalSet
         return null;
     }
 #endif
-#endregion
+    #endregion
 }

src/Microsoft.AspNetCore.OData/Microsoft.AspNetCore.OData.xml

@@ -1837,6 +1837,14 @@
             Gets the expected type of the entity for which the changes are tracked.
             </summary>
         </member>
+        <member name="M:Microsoft.AspNetCore.OData.Deltas.DeltaSet`1.BindAsync(Microsoft.AspNetCore.Http.HttpContext,System.Reflection.ParameterInfo)">
+            <summary>
+            Binds the <see cref="T:Microsoft.AspNetCore.Http.HttpContext"/> and <see cref="T:System.Reflection.ParameterInfo"/> to generate the <see cref="T:Microsoft.AspNetCore.OData.Deltas.DeltaSet`1"/>.
+            </summary>
+            <param name="context">The HttpContext.</param>
+            <param name="parameter">The parameter info.</param>
+            <returns>The built <see cref="T:Microsoft.AspNetCore.OData.Deltas.DeltaSet`1"/></returns>
+        </member>
         <member name="T:Microsoft.AspNetCore.OData.Deltas.IDelta">
             <summary>
             <see cref="T:Microsoft.AspNetCore.OData.Deltas.IDelta" /> allows and tracks changes to an object.

src/Microsoft.AspNetCore.OData/PublicAPI.Unshipped.txt

@@ -59,6 +59,7 @@ Microsoft.AspNetCore.OData.Results.IODataResult.Value.get -> object
 override Microsoft.AspNetCore.OData.Query.Wrapper.SelectExpandWrapperConverter.CanConvert(System.Type typeToConvert) -> bool
 override Microsoft.AspNetCore.OData.Query.Wrapper.SelectExpandWrapperConverter.CreateConverter(System.Type type, System.Text.Json.JsonSerializerOptions options) -> System.Text.Json.Serialization.JsonConverter
 static Microsoft.AspNetCore.OData.Deltas.Delta<T>.BindAsync(Microsoft.AspNetCore.Http.HttpContext context, System.Reflection.ParameterInfo parameter) -> System.Threading.Tasks.ValueTask<Microsoft.AspNetCore.OData.Deltas.Delta<T>>
+static Microsoft.AspNetCore.OData.Deltas.DeltaSet<T>.BindAsync(Microsoft.AspNetCore.Http.HttpContext context, System.Reflection.ParameterInfo parameter) -> System.Threading.Tasks.ValueTask<Microsoft.AspNetCore.OData.Deltas.DeltaSet<T>>
 static Microsoft.AspNetCore.OData.Formatter.ODataActionParameters.BindAsync(Microsoft.AspNetCore.Http.HttpContext context, System.Reflection.ParameterInfo parameter) -> System.Threading.Tasks.ValueTask<Microsoft.AspNetCore.OData.Formatter.ODataActionParameters>
 static Microsoft.AspNetCore.OData.Formatter.ODataUntypedActionParameters.BindAsync(Microsoft.AspNetCore.Http.HttpContext context, System.Reflection.ParameterInfo parameter) -> System.Threading.Tasks.ValueTask<Microsoft.AspNetCore.OData.Formatter.ODataUntypedActionParameters>
 static Microsoft.AspNetCore.OData.ODataEndpointConventionBuilderExtensions.AddODataQueryEndpointFilter(this Microsoft.AspNetCore.Builder.RouteHandlerBuilder builder, Microsoft.AspNetCore.OData.Query.IODataQueryEndpointFilter queryFilter) -> Microsoft.AspNetCore.Builder.RouteHandlerBuilder

test/Microsoft.AspNetCore.OData.E2E.Tests/MinimalApis/MinimalAPITodoEndpointsTest.cs

@@ -5,16 +5,19 @@
 // </copyright>
 //------------------------------------------------------------------------------
 
-using System;
-using System.Linq;
-using System.Net;
-using System.Net.Http;
-using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.OData.Deltas;
 using Microsoft.AspNetCore.OData.Query;
 using Microsoft.AspNetCore.OData.TestCommon;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.OData.Edm;
+using Microsoft.OData.UriParser;
+using System;
+using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Text;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace Microsoft.AspNetCore.OData.E2E.Tests.MinimalApis;
@@ -64,6 +67,19 @@ protected static void ConfigureAPIs(WebApplication app)
             .WithODataVersion(Microsoft.OData.ODataVersion.V401)
             .WithODataBaseAddressFactory(h => new Uri("http://localhost/v2"))
             .WithODataOptions(opt => opt.EnableAll().SetCaseInsensitive(true));
+
+        // DeltaSet<T> endpoint
+        app.MapPatch("v2/todos", (IMiniTodoTaskRepository db, DeltaSet<MiniTodo> changes) => $"Patch : '{changes.Count}' to todos")
+            .WithODataResult()
+            .WithODataModel(model)
+            .WithODataVersion(Microsoft.OData.ODataVersion.V401)
+            .WithODataBaseAddressFactory(h => new Uri("http://localhost/v2"))
+            .WithODataPathFactory(
+             (h, t) =>
+             {
+                 IEdmEntitySet todos = model.FindDeclaredEntitySet("Todos");
+                 return new ODataPath(new EntitySetSegment(todos));
+             });
     }
 
     [Fact]
@@ -151,4 +167,25 @@ public async Task QueryTodos_WithODataResult_WithModel_UsingFilter_ReturnsODataJ
             "\"Tasks\":[{\"Description\":\"Clean bathroom\"},{\"Description\":\"Clean carpet\"}]}",
             content);
     }
+
+    [Fact]
+    public async Task PatchChangesToTodos_WithODataResult_WithModel_WithPath_ReturnsODataJsonPayload()
+    {
+        // Arrange & Act
+        var payload = @"{
+            '@context':'http://localhost/v2/$metadata#Todos/$delta',
+            'value':[
+                { '@odata.id': 'Todos(42)','Title':'No 42 Todo'},
+                { '@odata.context': 'http://localhost/v2/$metadata#Todos/$deletedEntity', 'Id': 'Todos(12)', 'reason':'deleted'}
+            ]}";
+
+        StringContent stringContent = new StringContent(payload, Encoding.UTF8, "application/json");
+
+        var result = await _client.PatchAsync("/v2/todos", stringContent);
+        var content = await result.Content.ReadAsStringAsync();
+
+        // Assert
+        Assert.Equal(HttpStatusCode.OK, result.StatusCode);
+        Assert.Equal("{\"@context\":\"http://localhost/v2/$metadata#Edm.String\",\"value\":\"Patch : '2' to todos\"}", content);
+    }
 }

test/Microsoft.AspNetCore.OData.Tests/PublicApi/Microsoft.AspNetCore.OData.PublicApi.bsl

@@ -682,6 +682,11 @@ public class Microsoft.AspNetCore.OData.Deltas.DeltaSet`1 : System.Collections.O
 
 	System.Type ExpectedClrType  { public virtual get; }
 	System.Type StructuredType  { public virtual get; }
+
+	[
+	AsyncStateMachineAttribute(),
+	]
+	public static ValueTask`1 BindAsync (Microsoft.AspNetCore.Http.HttpContext context, System.Reflection.ParameterInfo parameter)
 }
 
 public interface Microsoft.AspNetCore.OData.Edm.IODataModelConfiguration {