diff --git a/app/api/v1/schema/diet.py b/app/api/v1/schema/diet.py
index afeb760..12b2e39 100644
--- a/app/api/v1/schema/diet.py
+++ b/app/api/v1/schema/diet.py
@@ -5,7 +5,7 @@ from apiflask import fields
 class DietRecordsIn(Schema):
     sort = fields.String()
     current_date = fields.String()
-    user_id = fields.String()
+    user_id = fields.String(allow_none=True)
 
 
 class heartOut(Schema):