Fix type casting, now we have an unexpected succes :)

crud.py

@@ -17,7 +17,7 @@ def create_movie(
 ):
     db_movie = models.Movie(
         title=title,
-        genres=str(genres),
+        genres=genres,
         description=description,
         vote_average=vote_average,
         vote_count=vote_count,

models.py

@@ -7,7 +7,10 @@ class NaiveStringList(types.TypeDecorator):
     impl = types.Unicode
     sep = "\n"
 
-    def process_bind_param(self, value, dialect):
+    def process_bind_param(self, value: list[str], dialect):
+        allowed = list, tuple
+        if not isinstance(value, allowed):
+            raise ValueError(f"{value!r}'s type should be in types{allowed} ")
         return self.sep.join(value)
 
     def process_result_value(self, value, dialect):

utests/test_sql_database.py

@@ -3,7 +3,7 @@ from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
 from sqlalchemy.pool import StaticPool
 from sqlalchemy import MetaData
-
+from sqlalchemy import exc
 from database import Base
 from dev import app, get_db
 from models import Movie
@@ -97,8 +97,8 @@ def test_genre_custom_type_serialize_type():
     try:
         with db_context() as db:
             movie = crud.create_movie(db, title=name, genres=csv_genres)
-    except TypeError as exc:
-        assert "tuple" in str(exc)
+    except (ValueError, exc.StatementError) as error:
+        assert "tuple" in str(error)
     else:
         raise RuntimeError("Exception should have been raised")