Prefer the original type before the inferred type

desjoerd · desjoerd · commit 59240b3e040a · 2025-12-16T10:30:52.000+01:00
diff --git a/src/Microsoft.OpenApi/Models/OpenApiSchema.cs b/src/Microsoft.OpenApi/Models/OpenApiSchema.cs
@@ -784,8 +784,8 @@ private void SerializeAsV2(
 
         private void SerializeTypeProperty(IOpenApiWriter writer, OpenApiSpecVersion version, JsonSchemaType? inferredType = null)
         {
-            // Use inferred type from oneOf/anyOf if provided and original type is not set
-            var typeToUse = inferredType ?? Type;
+            // Use original type or inferred type when the explicit type is not set
+            var typeToUse = Type ?? inferredType;
 
             if (typeToUse is null)
             {

Original file line number	Diff line number	Diff line change
`@@ -784,8 +784,8 @@ private void SerializeAsV2(`
`784`	`784`
`785`	`785`	`private void SerializeTypeProperty(IOpenApiWriter writer, OpenApiSpecVersion version, JsonSchemaType? inferredType = null)`
`786`	`786`	`{`
`787`		`- // Use inferred type from oneOf/anyOf if provided and original type is not set`
`788`		`- var typeToUse = inferredType ?? Type;`
	`787`	`+ // Use original type or inferred type when the explicit type is not set`
	`788`	`+ var typeToUse = Type ?? inferredType;`
`789`	`789`
`790`	`790`	`if (typeToUse is null)`
`791`	`791`	`{`