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

docs_src/query_params_str_validations/tutorial010_py39.py

@@ -0,0 +1,24 @@
+from typing import Union
+
+from fastapi import FastAPI, Query
+
+app = FastAPI()
+
+
+@app.get("/items/")
+async def read_items(
+    q: Union[str, None] = Query(
+        default=None,
+        alias="item-query",
+        title="Query string",
+        description="Query string for the items to search in the database that have a good match",
+        min_length=3,
+        max_length=50,
+        pattern="^fixedquery$",
+        deprecated=True,
+    ),
+):
+    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
+    if q:
+        results.update({"q": q})
+    return results