Fixes potential duplicate operation ids of navigation property paths with overloaded composable functions

src/Microsoft.OpenApi.OData.Reader/Common/EdmModelHelper.cs

@@ -93,38 +93,40 @@ internal static bool NavigationRestrictionsAllowsNavigability(
         /// Generates the operation id from a navigation property path.
         /// </summary>
         /// <param name="path">The target <see cref="ODataPath"/>.</param>
+        /// <param name="context">The OData context.</param>
         /// <param name="prefix">Optional: Identifier indicating whether it is a collection-valued non-indexed or single-valued navigation property.</param>
         /// <returns>The operation id generated from the given navigation property path.</returns>
-        internal static string GenerateNavigationPropertyPathOperationId(ODataPath path, string prefix = null)
+        internal static string GenerateNavigationPropertyPathOperationId(ODataPath path, ODataContext context, string prefix = null)
         {
-            IList<string> items = RetrieveNavigationPropertyPathsOperationIdSegments(path);
+            IList<string> items = RetrieveNavigationPropertyPathsOperationIdSegments(path, context);
 
             if (!items.Any())
                 return null;
 
-            int lastItemIndex = items.Count - 1;
+            int lastItemIndex = items[^1].StartsWith('-') ? items.Count - 2 : items.Count - 1;
 
             if (!string.IsNullOrEmpty(prefix))
             {
-                items[lastItemIndex] = prefix + Utils.UpperFirstChar(items.Last());
+                items[lastItemIndex] = prefix + Utils.UpperFirstChar(items[lastItemIndex]);
             }
             else
             {
-                items[lastItemIndex] = Utils.UpperFirstChar(items.Last());
+                items[lastItemIndex] = Utils.UpperFirstChar(items[lastItemIndex]);
             }
 
-            return string.Join(".", items);
+            return GenerateNavigationPropertyPathOperationId(items);
         }
 
         /// <summary>
         /// Generates the operation id from a complex property path.
         /// </summary>
         /// <param name="path">The target <see cref="ODataPath"/>.</param>
+        /// <param name="context">The OData context.</param>
         /// <param name="prefix">Optional: Identifier indicating whether it is a collection-valued or single-valued complex property.</param>
         /// <returns>The operation id generated from the given complex property path.</returns>
-        internal static string GenerateComplexPropertyPathOperationId(ODataPath path, string prefix = null)
+        internal static string GenerateComplexPropertyPathOperationId(ODataPath path, ODataContext context, string prefix = null)
         {
-            IList<string> items = RetrieveNavigationPropertyPathsOperationIdSegments(path);
+            IList<string> items = RetrieveNavigationPropertyPathsOperationIdSegments(path, context);
 
             if (!items.Any())
                 return null;
@@ -141,15 +143,29 @@ internal static string GenerateComplexPropertyPathOperationId(ODataPath path, st
                 items.Add(Utils.UpperFirstChar(lastSegment?.Identifier));
             }
 
-            return string.Join(".", items);
+            return GenerateNavigationPropertyPathOperationId(items);
+        }
+
+        /// <summary>
+        /// Generates a navigation property operation id from a list of string values.
+        /// </summary>
+        /// <param name="items">The list of string values.</param>
+        /// <returns>The generated navigation property operation id.</returns>
+        private static string GenerateNavigationPropertyPathOperationId(IList<string> items)
+        {
+            if (!items.Any())
+                return null;
+
+            return string.Join(".", items).Replace(".-", "-", StringComparison.OrdinalIgnoreCase); // Format any hashed value appropriately (this will be the last value)
         }
 
         /// <summary>
         /// Retrieves the segments of an operation id generated from a navigation property path.
         /// </summary>
         /// <param name="path">The target <see cref="ODataPath"/>.</param>
+        /// <param name="context">The OData context.</param>
         /// <returns>The segments of an operation id generated from the given navigation property path.</returns>
-        internal static IList<string> RetrieveNavigationPropertyPathsOperationIdSegments(ODataPath path)
+        internal static IList<string> RetrieveNavigationPropertyPathsOperationIdSegments(ODataPath path, ODataContext context)
         {
             Utils.CheckArgumentNull(path, nameof(path));
 
@@ -173,6 +189,8 @@ s is ODataOperationSegment ||
             Utils.CheckArgumentNull(segments, nameof(segments));
 
             string previousTypeCastSegmentId = null;
+            string pathHash = string.Empty;
+
             foreach (var segment in segments)
             {
                 if (segment is ODataNavigationPropertySegment navPropSegment)
@@ -192,6 +210,14 @@ s is ODataOperationSegment ||
                 else if (segment is ODataOperationSegment operationSegment)
                 {
                     // Navigation property generated via composable function
+                    if (operationSegment.Operation is IEdmFunction function && context.Model.IsOperationOverload(function))
+                    {
+                        // Hash the segment to avoid duplicate operationIds
+                        pathHash = string.IsNullOrEmpty(pathHash)
+                            ? operationSegment.GetPathHash(context.Settings)
+                            : (pathHash + operationSegment.GetPathHash(context.Settings)).GetHashSHA256()[..4];
+                    }
+
                     items.Add(operationSegment.Identifier);
                 }
                 else if (segment is ODataKeySegment keySegment && keySegment.IsAlternateKey)
@@ -208,6 +234,11 @@ s is ODataOperationSegment ||
                 }
             }
 
+            if (!string.IsNullOrEmpty(pathHash))
+            {
+                items.Add("-" + pathHash);
+            }
+
             return items;
         }
 
@@ -320,9 +351,10 @@ internal static string GenerateComplexPropertyPathTagName(ODataPath path, ODataC
         /// Generates the operation id prefix from an OData type cast path.
         /// </summary>
         /// <param name="path">The target <see cref="ODataPath"/>.</param>
+        /// <param name="context">The OData context.</param>
         /// <param name="includeListOrGetPrefix">Optional: Whether to include the List or Get prefix to the generated operation id.</param>
         /// <returns>The operation id prefix generated from the OData type cast path.</returns>
-        internal static string GenerateODataTypeCastPathOperationIdPrefix(ODataPath path, bool includeListOrGetPrefix = true)
+        internal static string GenerateODataTypeCastPathOperationIdPrefix(ODataPath path, ODataContext context, bool includeListOrGetPrefix = true)
         {
             // Get the segment before the last OData type cast segment
             ODataTypeCastSegment typeCastSegment = path.Segments.OfType<ODataTypeCastSegment>()?.Last();
@@ -352,7 +384,7 @@ internal static string GenerateODataTypeCastPathOperationIdPrefix(ODataPath path
             if (secondLastSegment is ODataComplexPropertySegment complexSegment)
             {
                 string listOrGet = includeListOrGetPrefix ? (complexSegment.Property.Type.IsCollection() ? "List" : "Get") : null;
-                operationId = GenerateComplexPropertyPathOperationId(path, listOrGet);
+                operationId = GenerateComplexPropertyPathOperationId(path, context, listOrGet);
             }
             else if (secondLastSegment is ODataNavigationPropertySegment navPropSegment)
             {
@@ -362,13 +394,13 @@ internal static string GenerateODataTypeCastPathOperationIdPrefix(ODataPath path
                     prefix = navPropSegment?.NavigationProperty.TargetMultiplicity() == EdmMultiplicity.Many ? "List" : "Get";
                 }
 
-                operationId = GenerateNavigationPropertyPathOperationId(path, prefix);
+                operationId = GenerateNavigationPropertyPathOperationId(path, context, prefix);
             }
             else if (secondLastSegment is ODataKeySegment keySegment)
             {
                 if (isIndexedCollValuedNavProp)
                 {
-                    operationId = GenerateNavigationPropertyPathOperationId(path, "Get");
+                    operationId = GenerateNavigationPropertyPathOperationId(path, context, "Get");
                 }
                 else
                 {

src/Microsoft.OpenApi.OData.Reader/Microsoft.OpenAPI.OData.Reader.csproj

@@ -15,7 +15,7 @@
     <TargetFrameworks>net8.0</TargetFrameworks>
     <PackageId>Microsoft.OpenApi.OData</PackageId>
     <SignAssembly>true</SignAssembly>
-    <Version>2.0.0-preview.5</Version>
+    <Version>2.0.0-preview.6</Version>
     <Description>This package contains the codes you need to convert OData CSDL to Open API Document of Model.</Description>
     <Copyright>© Microsoft Corporation. All rights reserved.</Copyright>
     <PackageTags>Microsoft OpenApi OData EDM</PackageTags>
@@ -28,9 +28,10 @@
 		- Adds nullable to double schema conversions #581
 		- Updates tag names for actions/functions operations #585
 		- Creates unique operation ids for paths with composable overloaded functions #580
-        - Further fixes for double/decimal/float schema conversions #581
-        - Replaced integer types by number types
+		- Further fixes for double/decimal/float schema conversions #581
+		- Replaced integer types by number types
 		- Further fix for generating unique operation ids for paths with composable overloaded functions where all functions in path are overloaded #594
+		- Further fix for generating unique operation ids for navigation property paths with composable overloaded functions #596
 	</PackageReleaseNotes>
     <AssemblyName>Microsoft.OpenApi.OData.Reader</AssemblyName>
     <AssemblyOriginatorKeyFile>..\..\tool\Microsoft.OpenApi.OData.snk</AssemblyOriginatorKeyFile>

src/Microsoft.OpenApi.OData.Reader/Operation/ComplexPropertyGetOperationHandler.cs

@@ -39,7 +39,7 @@ protected override void SetBasicInfo(OpenApiOperation operation)
         if (Context.Settings.EnableOperationId)
         {
             string prefix = ComplexPropertySegment.Property.Type.IsCollection() ? "List" : "Get";
-            operation.OperationId = EdmModelHelper.GenerateComplexPropertyPathOperationId(Path, prefix);
+            operation.OperationId = EdmModelHelper.GenerateComplexPropertyPathOperationId(Path, Context, prefix);
         }
 
         // Summary and Description

src/Microsoft.OpenApi.OData.Reader/Operation/ComplexPropertyPostOperationHandler.cs

@@ -42,7 +42,7 @@ protected override void SetBasicInfo(OpenApiOperation operation)
         // OperationId
         if (Context.Settings.EnableOperationId)
         {
-            operation.OperationId = EdmModelHelper.GenerateComplexPropertyPathOperationId(Path, "Set");
+            operation.OperationId = EdmModelHelper.GenerateComplexPropertyPathOperationId(Path, Context, "Set");
         }
 
         // Summary and Description

src/Microsoft.OpenApi.OData.Reader/Operation/ComplexPropertyUpdateOperationHandler.cs

@@ -40,7 +40,7 @@ protected override void SetBasicInfo(OpenApiOperation operation)
         // OperationId
         if (Context.Settings.EnableOperationId)
         {
-            operation.OperationId = EdmModelHelper.GenerateComplexPropertyPathOperationId(Path, "Update");
+            operation.OperationId = EdmModelHelper.GenerateComplexPropertyPathOperationId(Path, Context, "Update");
         }
     }
 

src/Microsoft.OpenApi.OData.Reader/Operation/DollarCountGetOperationHandler.cs

@@ -128,17 +128,17 @@ protected override void SetBasicInfo(OpenApiOperation operation)
                 }
                 else if (SecondLastSegment is ODataNavigationPropertySegment)
                 {
-                    var navPropOpId = string.Join(".", EdmModelHelper.RetrieveNavigationPropertyPathsOperationIdSegments(Path));
+                    var navPropOpId = string.Join(".", EdmModelHelper.RetrieveNavigationPropertyPathsOperationIdSegments(Path, Context));
                     operation.OperationId = $"{navPropOpId}.GetCount-{Path.GetPathHash(Context.Settings)}";
                 }
                 else if (SecondLastSegment is ODataTypeCastSegment odataTypeCastSegment)
                 {
                     IEdmNamedElement targetStructuredType = odataTypeCastSegment.StructuredType as IEdmNamedElement;
-                    operation.OperationId = $"{EdmModelHelper.GenerateODataTypeCastPathOperationIdPrefix(Path, false)}.GetCount.As{Utils.UpperFirstChar(targetStructuredType.Name)}-{Path.GetPathHash(Context.Settings)}";
+                    operation.OperationId = $"{EdmModelHelper.GenerateODataTypeCastPathOperationIdPrefix(Path, Context, false)}.GetCount.As{Utils.UpperFirstChar(targetStructuredType.Name)}-{Path.GetPathHash(Context.Settings)}";
                 }
                 else if (SecondLastSegment is ODataComplexPropertySegment)
                 {
-                    operation.OperationId = $"{EdmModelHelper.GenerateComplexPropertyPathOperationId(Path)}.GetCount-{Path.GetPathHash(Context.Settings)}";
+                    operation.OperationId = $"{EdmModelHelper.GenerateComplexPropertyPathOperationId(Path, Context)}.GetCount-{Path.GetPathHash(Context.Settings)}";
                 }
             }
 

src/Microsoft.OpenApi.OData.Reader/Operation/NavigationPropertyOperationHandler.cs

@@ -107,7 +107,7 @@ protected override void SetExtensions(OpenApiOperation operation)
 
         internal string GetOperationId(string prefix = null)
         {            
-            return EdmModelHelper.GenerateNavigationPropertyPathOperationId(Path, prefix);
+            return EdmModelHelper.GenerateNavigationPropertyPathOperationId(Path, Context, prefix);
         }               
 
         /// <inheritdoc/>

src/Microsoft.OpenApi.OData.Reader/Operation/ODataTypeCastGetOperationHandler.cs

@@ -188,7 +188,7 @@ protected override void SetBasicInfo(OpenApiOperation operation)
 
         // OperationId
         if (Context.Settings.EnableOperationId)
-			operation.OperationId = EdmModelHelper.GenerateODataTypeCastPathOperationIdPrefix(Path) + $".As{Utils.UpperFirstChar(TargetSchemaElement.Name)}";
+			operation.OperationId = EdmModelHelper.GenerateODataTypeCastPathOperationIdPrefix(Path, Context) + $".As{Utils.UpperFirstChar(TargetSchemaElement.Name)}";
 
         base.SetBasicInfo(operation);
 	}

test/Microsoft.OpenAPI.OData.Reader.Tests/Operation/NavigationPropertyGetOperationHandlerTests.cs

@@ -131,6 +131,70 @@ public void CreateNavigationGetOperationViaComposableFunctionReturnsCorrectOpera
             Assert.Contains(operation.Parameters, x => x.Name == "path");
         }
 
+        [Fact]
+        public void CreateNavigationGetOperationViaOverloadedComposableFunctionReturnsCorrectOperation()
+        {
+            // Arrange
+            IEdmModel model = EdmModelHelper.GraphBetaModel;
+            ODataContext context = new(model, new OpenApiConvertSettings()
+            {
+                EnableOperationId = true
+            });
+
+            IEdmEntitySet drives = model.EntityContainer.FindEntitySet("drives");
+            IEdmEntityType drive = model.SchemaElements.OfType<IEdmEntityType>().First(c => c.Name == "drive");
+            IEdmNavigationProperty items = drive.DeclaredNavigationProperties().First(c => c.Name == "items");
+            IEdmEntityType driveItem = model.SchemaElements.OfType<IEdmEntityType>().First(c => c.Name == "driveItem");
+            IEdmNavigationProperty workbook = driveItem.DeclaredNavigationProperties().First(c => c.Name == "workbook");
+            IEdmEntityType workbookEntity = model.SchemaElements.OfType<IEdmEntityType>().First(c => c.Name == "workbook");
+            IEdmNavigationProperty worksheets = workbookEntity.DeclaredNavigationProperties().First(c => c.Name == "worksheets");
+            IEdmEntityType workbookWorksheet = model.SchemaElements.OfType<IEdmEntityType>().First(c => c.Name == "workbookWorksheet");
+            IEdmOperation usedRangeWithParams = model.SchemaElements.OfType<IEdmOperation>().First(f => f.Name == "usedRange" && f.Parameters.Any(x => x.Name.Equals("valuesOnly")));
+            IEdmOperation usedRange = model.SchemaElements.OfType<IEdmOperation>().First(f => f.Name == "usedRange" && f.Parameters.Count() == 1);
+            IEdmEntityType workbookRange = model.SchemaElements.OfType<IEdmEntityType>().First(c => c.Name == "workbookRange");
+            IEdmNavigationProperty format = workbookRange.DeclaredNavigationProperties().First(c => c.Name == "format");
+
+
+            ODataPath path1 = new(new ODataNavigationSourceSegment(drives),
+                new ODataKeySegment(drive),
+                new ODataNavigationPropertySegment(items),
+                new ODataKeySegment(driveItem),
+                new ODataNavigationPropertySegment(workbook),
+                new ODataNavigationPropertySegment(worksheets),
+                new ODataKeySegment(workbookWorksheet),
+                new ODataOperationSegment(usedRangeWithParams),
+                new ODataNavigationPropertySegment(format));
+
+            ODataPath path2 = new(new ODataNavigationSourceSegment(drives),
+                new ODataKeySegment(drive),
+                new ODataNavigationPropertySegment(items),
+                new ODataKeySegment(driveItem),
+                new ODataNavigationPropertySegment(workbook),
+                new ODataNavigationPropertySegment(worksheets),
+                new ODataKeySegment(workbookWorksheet),
+                new ODataOperationSegment(usedRange),
+                new ODataNavigationPropertySegment(format));
+
+            // Act
+            var operation1 = _operationHandler.CreateOperation(context, path1);
+            var operation2 = _operationHandler.CreateOperation(context, path2);
+
+            // Assert
+            Assert.NotNull(operation1);
+            Assert.NotNull(operation2);
+
+            Assert.Equal("drives.items.workbook.worksheets.usedRange.GetFormat-206d", operation1.OperationId);
+            Assert.Equal("drives.items.workbook.worksheets.usedRange.GetFormat-ec2c", operation2.OperationId);
+
+            Assert.NotNull(operation1.Parameters);
+            Assert.Equal(6, operation1.Parameters.Count);
+            Assert.Contains(operation1.Parameters, x => x.Name == "valuesOnly");
+
+            Assert.NotNull(operation2.Parameters);
+            Assert.Equal(5, operation2.Parameters.Count);
+            Assert.DoesNotContain(operation2.Parameters, x => x.Name == "valuesOnly");
+        }
+
         [Theory]
         [InlineData(true)]
         [InlineData(false)]