Sync fastapi docs from 50fa3f7c on 2026-01-11

docs_src/query_params_str_validations/tutorial014_py39.py

@@ -0,0 +1,15 @@
+from typing import Union
+
+from fastapi import FastAPI, Query
+
+app = FastAPI()
+
+
+@app.get("/items/")
+async def read_items(
+    hidden_query: Union[str, None] = Query(default=None, include_in_schema=False),
+):
+    if hidden_query:
+        return {"hidden_query": hidden_query}
+    else:
+        return {"hidden_query": "Not found"}