fix: improve base query (deletion)

db/fetching.py

@@ -12,7 +12,7 @@ class DataFetching:
         user_meta_query = UserMetaQuery(self.user)
         user_meta_entries = user_meta_query.get_user_meta_entries(self.db)
         
-        if not user_meta_entries:
+        if not user_meta_entries or user_meta_entries==[]:
             return {"info": "No book collection found"}
         
         # Extract relevant data from the user_meta_entries

db/query/base_query.py

@@ -16,12 +16,12 @@ class BaseQuery:
             if multiple:
                 results = db.execute(query).all()
                 if not results:
-                    return no_entries_found(not_found_message)
+                    return []
                 return results
             else:
                 result = db.execute(query).scalar_one_or_none()
                 if not result:
-                    return not_found_error(not_found_message)
+                    return []
                 return result
         except Exception as e:
             return handle_error(
@@ -65,7 +65,9 @@ class BaseQuery:
             return entry
 
         # Build the delete query
-        delete_query = delete(model).where(model.id == id)
+        delete_query = delete(model)
+        if id :
+            delete_query = delete_query.where(model.id == id)
         if filter_conditions:
             delete_query = delete_query.where(*filter_conditions)