From e46f4bf01eaab1cd2c42f377efa3a834db6cd398 Mon Sep 17 00:00:00 2001
From: Lance Edgar <lance@edbob.org>
Date: Tue, 6 Sep 2022 22:19:01 -0500
Subject: [PATCH] Do not convert date if already a date

---
 tailbone/grids/filters.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tailbone/grids/filters.py b/tailbone/grids/filters.py
index f504664b..edce41dd 100644
--- a/tailbone/grids/filters.py
+++ b/tailbone/grids/filters.py
@@ -675,6 +675,9 @@ class AlchemyDateFilter(AlchemyGridFilter):
         Convert user input to a proper ``datetime.date`` object.
         """
         if value:
+            if isinstance(value, datetime.date):
+                return value
+
             try:
                 dt = datetime.datetime.strptime(value, '%Y-%m-%d')
             except ValueError: