[UPD] Exception handling

app/controller/__init__.py

@@ -6,7 +6,11 @@ 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 sqlalchemy.exc import NoResultFound
+
 from .exceptions import LibraryCreationException
+from .exceptions import LibraryReadException
+from .exceptions import LibraryUpdateException
 
 import logging
 logging.basicConfig(level=logging.DEBUG)
@@ -67,7 +71,8 @@ class LibraryController:
             self._library = libraries[0]
             return True
         return False
-    
+
+    #CRUDS
     def create(self, library:Library):
         try:
             self._library = create(self.session, library)
@@ -76,20 +81,35 @@ class LibraryController:
                 "Cannot create library",
                 f"{e.orig}", 
                 "library",
-                str(library),
-                400
+                str(library)
             )
         return self
     
     def read(self, _id):
-        self._library = read(self.session, _id, Library)
+        try:
+            self._library = read(self.session, _id, Library)
+        except NoResultFound as e:
+            raise LibraryReadException(
+                f"Cannot read Library with id {_id}",
+                f"{e}", 
+                "library",
+                _id
+            )
         return self
     
     def read_all(self):
         self._libraries = read_all(self.session, Library)
         
     def update(self):
-        self.session.commit()
+        try:
+            self.session.commit()
+        except IntegrityError as e:
+            raise LibraryUpdateException(
+                f"Cannot update Library",
+                f"{e}", 
+                "library",
+                None
+            )
 
     def delete(self):
         delete(self.session, self.data)