From ff504264250778650d6ccde7b85f6f44120cdf6c Mon Sep 17 00:00:00 2001
From: "Matt Parker [SSW]" <61717342+MattParkerDev@users.noreply.github.com>
Date: Thu, 20 Jun 2024 15:13:54 +1000
Subject: [PATCH] Update AspNetCoreOpenApiDocumentGenerator.cs

---
 .../AspNetCoreOpenApiDocumentGenerator.cs                  | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/NSwag.Generation.AspNetCore/AspNetCoreOpenApiDocumentGenerator.cs b/src/NSwag.Generation.AspNetCore/AspNetCoreOpenApiDocumentGenerator.cs
index b9fa02ff52..306b28e076 100644
--- a/src/NSwag.Generation.AspNetCore/AspNetCoreOpenApiDocumentGenerator.cs
+++ b/src/NSwag.Generation.AspNetCore/AspNetCoreOpenApiDocumentGenerator.cs
@@ -15,6 +15,7 @@
 using System.Text;
 using System.Text.Json;
 using System.Threading.Tasks;
+using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.Abstractions;
 using Microsoft.AspNetCore.Mvc.ApiExplorer;
@@ -532,6 +533,12 @@ private string GetOperationId(OpenApiDocument document, ApiDescription apiDescri
                     .FirstOrDefault()?
                     .RouteName;
 
+                var prefix = apiDescription.ActionDescriptor.EndpointMetadata.OfType<TagsAttribute>().FirstOrDefault()?.Tags.FirstOrDefault();
+                if (!string.IsNullOrWhiteSpace(prefix))
+                {
+                    routeName = prefix + "_" + routeName;
+                }
+
                 if (routeName != null)
                 {
                     return routeName;