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

docs_src/dependencies/tutorial005_py39.py

@@ -0,0 +1,23 @@
+from typing import Union
+
+from fastapi import Cookie, Depends, FastAPI
+
+app = FastAPI()
+
+
+def query_extractor(q: Union[str, None] = None):
+    return q
+
+
+def query_or_cookie_extractor(
+    q: str = Depends(query_extractor),
+    last_query: Union[str, None] = Cookie(default=None),
+):
+    if not q:
+        return last_query
+    return q
+
+
+@app.get("/items/")
+async def read_query(query_or_default: str = Depends(query_or_cookie_extractor)):
+    return {"q_or_cookie": query_or_default}