Fix OpenAPI schema generation for FileContentResult to use binary format

Adit Sheth · Adit Sheth · commit a127105ea1a6 · 2025-08-07T16:41:04.000-07:00
diff --git a/src/OpenApi/src/Services/Schemas/OpenApiSchemaService.cs b/src/OpenApi/src/Services/Schemas/OpenApiSchemaService.cs
@@ -58,15 +58,15 @@ internal sealed class OpenApiSchemaService(
         TransformSchemaNode = (context, schema) =>
         {
             var type = context.TypeInfo.Type;
-            // Fix up schemas generated for IFormFile, IFormFileCollection, Stream, and PipeReader
+            // Fix up schemas generated for IFormFile, IFormFileCollection, Stream, PipeReader, and FileContentResult
             // that appear as properties within complex types.
-            if (type == typeof(IFormFile) || type == typeof(Stream) || type == typeof(PipeReader))
+            if (type == typeof(IFormFile) || type == typeof(Stream) || type == typeof(PipeReader) || type == typeof(FileContentResult))
             {
                 schema = new JsonObject
                 {
                     [OpenApiSchemaKeywords.TypeKeyword] = "string",
                     [OpenApiSchemaKeywords.FormatKeyword] = "binary",
-                    [OpenApiConstants.SchemaId] = "IFormFile"
+                    [OpenApiConstants.SchemaId] = type == typeof(FileContentResult) ? "FileContentResult" : "IFormFile"
                 };
             }
             else if (type == typeof(IFormFileCollection))

Original file line number	Diff line number	Diff line change
`@@ -58,15 +58,15 @@ internal sealed class OpenApiSchemaService(`
`58`	`58`	`TransformSchemaNode = (context, schema) =>`
`59`	`59`	`{`
`60`	`60`	`var type = context.TypeInfo.Type;`
`61`		`- // Fix up schemas generated for IFormFile, IFormFileCollection, Stream, and PipeReader`
	`61`	`+ // Fix up schemas generated for IFormFile, IFormFileCollection, Stream, PipeReader, and FileContentResult`
`62`	`62`	`// that appear as properties within complex types.`
`63`		`- if (type == typeof(IFormFile) \|\| type == typeof(Stream) \|\| type == typeof(PipeReader))`
	`63`	`+ if (type == typeof(IFormFile) \|\| type == typeof(Stream) \|\| type == typeof(PipeReader) \|\| type == typeof(FileContentResult))`
`64`	`64`	`{`
`65`	`65`	`schema = new JsonObject`
`66`	`66`	`{`
`67`	`67`	`[OpenApiSchemaKeywords.TypeKeyword] = "string",`
`68`	`68`	`[OpenApiSchemaKeywords.FormatKeyword] = "binary",`
`69`		`- [OpenApiConstants.SchemaId] = "IFormFile"`
	`69`	`+ [OpenApiConstants.SchemaId] = type == typeof(FileContentResult) ? "FileContentResult" : "IFormFile"`
`70`	`70`	`};`
`71`	`71`	`}`
`72`	`72`	`else if (type == typeof(IFormFileCollection))`