[WIP] Exception handling

app/controller/__init__.py

@@ -1,10 +1,13 @@
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
+from sqlalchemy.exc import IntegrityError
 
 from app.api.cruds.base import create, read, update, delete, read_all
 from app.schema.library import Library
 from ..db.config.config import get_engine_configuration
 
+from .exceptions import LibraryCreationException
+
 import logging
 logging.basicConfig(level=logging.DEBUG)
 logger = logging.getLogger(__name__)
@@ -66,7 +69,16 @@ class LibraryController:
         return False
     
     def create(self, library:Library):
-        self._library = create(self.session, library)
+        try:
+            self._library = create(self.session, library)
+        except IntegrityError as e:
+            raise LibraryCreationException(
+                "Cannot create library",
+                f"{e.orig}", 
+                "library",
+                str(library),
+                400
+            )
         return self
     
     def read(self, _id):