From bdfb072f50f773abba2da85e7bf5023b1f9319a4 Mon Sep 17 00:00:00 2001
From: Paul Roever <paul@roever-family.net>
Date: Mon, 25 Mar 2024 23:23:33 +0000
Subject: [PATCH] support field max_length by checking MaxLen type

---
 sqlmodel/_compat.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sqlmodel/_compat.py b/sqlmodel/_compat.py
index 072d2b0f58..f6f083e71c 100644
--- a/sqlmodel/_compat.py
+++ b/sqlmodel/_compat.py
@@ -18,6 +18,7 @@
     Union,
 )
 
+from annotated_types import MaxLen
 from pydantic import VERSION as PYDANTIC_VERSION
 from pydantic import BaseModel
 from pydantic.fields import FieldInfo
@@ -201,6 +202,10 @@ def get_field_metadata(field: Any) -> Any:
         for meta in field.metadata:
             if isinstance(meta, PydanticMetadata):
                 return meta
+            elif isinstance(meta, MaxLen):
+                fake = FakeMetadata()
+                fake.max_length = meta.max_length
+                return fake
         return FakeMetadata()
 
     def post_init_field_info(field_info: FieldInfo) -> None: