From dc4dc42ec5732e0467ae6f8df449998462ef242e Mon Sep 17 00:00:00 2001
From: Jakob Jul Elben <elbenjakobjul@gmail.com>
Date: Sat, 27 Aug 2022 22:13:32 +0200
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Raise=20an=20exception=20when=20usi?=
 =?UTF-8?q?ng=20a=20Pydantic=20field=20type=20with=20no=20matching=20SQLAl?=
 =?UTF-8?q?chemy=20type=20(#18)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>
---
 sqlmodel/main.py           |  1 +
 tests/test_missing_type.py | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 tests/test_missing_type.py

diff --git a/sqlmodel/main.py b/sqlmodel/main.py
index 63c6dcb..9efdafe 100644
--- a/sqlmodel/main.py
+++ b/sqlmodel/main.py
@@ -415,6 +415,7 @@ def get_sqlachemy_type(field: ModelField) -> Any:
         return AutoString
     if issubclass(field.type_, uuid.UUID):
         return GUID
+    raise ValueError(f"The field {field.name} has no matching SQLAlchemy type")
 
 
 def get_column_from_field(field: ModelField) -> Column:  # type: ignore
diff --git a/tests/test_missing_type.py b/tests/test_missing_type.py
new file mode 100644
index 0000000..2185fa4
--- /dev/null
+++ b/tests/test_missing_type.py
@@ -0,0 +1,21 @@
+from typing import Optional
+
+import pytest
+from sqlmodel import Field, SQLModel
+
+
+def test_missing_sql_type():
+    class CustomType:
+        @classmethod
+        def __get_validators__(cls):
+            yield cls.validate
+
+        @classmethod
+        def validate(cls, v):
+            return v
+
+    with pytest.raises(ValueError):
+
+        class Item(SQLModel, table=True):
+            id: Optional[int] = Field(default=None, primary_key=True)
+            item: CustomType