diff --git a/fastapi_admin/resources.py b/fastapi_admin/resources.py
index 6789b3d1..8c65f5a2 100644
--- a/fastapi_admin/resources.py
+++ b/fastapi_admin/resources.py
@@ -159,6 +159,8 @@ async def resolve_data(cls, request: Request, data: FormData):
             if input_.context.get("disabled") or isinstance(input_, inputs.DisplayOnly):
                 continue
             name = input_.context.get("name")
+            if input_.context.get("null") and data.get(name) == "":
+                continue
             if isinstance(input_, inputs.ManyToMany):
                 v = data.getlist(name)
                 value = await input_.parse_value(request, v)