Fix base_model setting for AutoSchema

saritasa_sqlalchemy_tools/auto_schema.py

@@ -114,13 +114,15 @@ def get_schema(
         model_config = getattr(
             cls.Meta,
             "model_config",
-            pydantic.ConfigDict(from_attributes=True),
+            None,
         )
         # Only config or base model could be passed to create_model
-        if base_model:
+        if base_model and model_config:
             raise ValueError(
                 "Only config or base model could be passed to create_model",
             )
+        if base_model is None and model_config is None:
+            model_config = pydantic.ConfigDict(from_attributes=True)
 
         extra_fields_config = getattr(
             cls.Meta,

tests/test_auto_schema.py

@@ -263,6 +263,22 @@ class Meta:
         AutoSchema.get_schema()
 
 
+async def test_auto_schema_use_model() -> None:
+    """Test schema generation works when base model is specified."""
+
+    class AutoSchema(saritasa_sqlalchemy_tools.ModelAutoSchema):
+        class Meta:
+            model = models.TestModel
+            base_model = pydantic.BaseModel
+            fields = (
+                "id",
+                "created",
+                "modified",
+            )
+
+    AutoSchema.get_schema()
+
+
 def custom_validator(
     cls,  # noqa: ANN001
     value: typing.Any,