[add]: loan status

app/models/loan.py

@@ -3,6 +3,8 @@ from app.extensions import db
 from app.models.customer import Customer
 from app.models.account import Account
 from sqlalchemy.exc import IntegrityError
+from sqlalchemy.orm import relationship
+from app.models import Customer
 
 
 class Loan(db.Model):
@@ -21,6 +23,12 @@ class Loan(db.Model):
     created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
     updated_at = db.Column(db.DateTime, default=datetime.now(timezone.utc), onupdate=datetime.now(timezone.utc))
 
+    customer = relationship(
+        "Customer",
+        primaryjoin="Customer.id == Loan.customer_id",
+        foreign_keys=[customer_id],
+        back_populates="loans",
+    )
 
     @classmethod
     def create_loan(cls, customer_id, account_id, offer_id, principal_amount, status='pending'):