Add the ty for type checking

.pre-commit-config.yaml

@@ -23,3 +23,11 @@ repos:
           - '-o'
           - 'requirements.txt'
           - '--no-hashes'
+
+  - repo: local
+    hooks:
+      - id: ty
+        language: python
+        name: ty
+        pass_filenames: false
+        entry: uv run ty check sqlalchemy_crud_plus

pyproject.toml

@@ -28,12 +28,13 @@ repository = "https://github.com/fastapi-practices/sqlalchemy-crud-plus"
 
 [dependency-groups]
 dev = [
-    "pytest>=8.1.1",
-    "aiosqlite>=0.20.0",
-    "pytest-asyncio>=0.23.6",
+    "pytest>=8.4.0",
+    "aiosqlite>=0.21.0",
+    "pytest-asyncio>=1.2.0",
+    "ty>=0.0.1a23",
 ]
 lint = [
-    "pre-commit>=3.5.0",
+    "pre-commit>=4.3.0",
 ]
 
 [tool.uv]

requirements.txt

@@ -31,9 +31,9 @@ platformdirs==4.5.0
 pluggy==1.6.0
     # via pytest
 pre-commit==4.3.0
-pydantic==2.12.0
+pydantic==2.12.2
     # via sqlalchemy-crud-plus
-pydantic-core==2.41.1
+pydantic-core==2.41.4
     # via pydantic
 pygments==2.19.2
     # via pytest
@@ -46,6 +46,7 @@ sqlalchemy==2.0.44
     # via sqlalchemy-crud-plus
 tomli==2.3.0 ; python_full_version < '3.11'
     # via pytest
+ty==0.0.1a23
 typing-extensions==4.15.0
     # via
     #   aiosqlite

sqlalchemy_crud_plus/utils.py

@@ -356,7 +356,8 @@ def build_load_strategies(model: type[Model], load_strategies: LoadStrategies |
             try:
                 attr = getattr(model, column)
                 strategy_func = strategies_map.get(strategy_name)
-                options.append(strategy_func(attr))
+                if strategy_func:
+                    options.append(strategy_func(attr))
             except AttributeError:
                 raise ModelColumnError(f'Invalid relationship column: {column}')