From 021863cba1d3a9ff6259cd2fbc25120da79b46db Mon Sep 17 00:00:00 2001
From: Sujit-1509 <sujit-1509@users.noreply.github.com>
Date: Wed, 10 Jun 2026 17:48:09 +0530
Subject: [PATCH 1/2] fix: support StringConstraints metadata in SQLAlchemy
 type generation

---
 sqlmodel/_compat.py |  3 ++-
 tests/test_main.py  | 11 +++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/sqlmodel/_compat.py b/sqlmodel/_compat.py
index a220b193f1..9ffcf28080 100644
--- a/sqlmodel/_compat.py
+++ b/sqlmodel/_compat.py
@@ -20,6 +20,7 @@
 from pydantic import VERSION as P_VERSION
 from pydantic import BaseModel
 from pydantic import ConfigDict as ConfigDict
+from pydantic import StringConstraints as StringConstraints
 from pydantic._internal._fields import PydanticMetadata
 from pydantic._internal._model_construction import ModelMetaclass as ModelMetaclass
 from pydantic._internal._repr import Representation as Representation
@@ -200,7 +201,7 @@ def get_sa_type_from_field(field: Any) -> Any:
 
 def get_field_metadata(field: Any) -> Any:
     for meta in field.metadata:
-        if isinstance(meta, (PydanticMetadata, MaxLen)):
+        if isinstance(meta, (PydanticMetadata, MaxLen, StringConstraints)):
             return meta
     return FakeMetadata()
 
diff --git a/tests/test_main.py b/tests/test_main.py
index fa40b71853..0c8b8e22c5 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -216,3 +216,14 @@ class Hero(SQLModel, table=True):
     assert len(foreign_keys) == 1
     assert foreign_keys[0].ondelete == "CASCADE"
     assert team_id_column.nullable is False
+
+
+def test_string_constraints_max_length(clear_sqlmodel):
+    from typing import Annotated
+    from pydantic import StringConstraints
+
+    class Item(SQLModel, table=True):
+        id: int | None = Field(default=None, primary_key=True)
+        name: Annotated[str, StringConstraints(max_length=50)]
+
+    assert Item.__table__.c.name.type.length == 50

From 8509853145471d75b7b71cc619953567b093adeb Mon Sep 17 00:00:00 2001
From: "pre-commit-ci-lite[bot]"
 <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
Date: Wed, 10 Jun 2026 12:19:13 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=F0=9F=8E=A8=20Auto=20format?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 tests/test_main.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/test_main.py b/tests/test_main.py
index 0c8b8e22c5..b024c2d747 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -220,6 +220,7 @@ class Hero(SQLModel, table=True):
 
 def test_string_constraints_max_length(clear_sqlmodel):
     from typing import Annotated
+
     from pydantic import StringConstraints
 
     class Item(SQLModel, table=True):