from app.utils.logger import logger

app/models/loan.py

@@ -6,7 +6,7 @@ from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm import relationship
 from sqlalchemy import and_, or_, not_
 from app.models import Customer
-
+from app.utils.logger import logger
 
 class Loan(db.Model):
     __tablename__ = 'loans'