[add]: Lona repayment schedule

app/models/loan.py

@@ -5,6 +5,9 @@ from app.models.account import Account
 from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm import relationship
 from app.models.loan_charge import LoanCharge
+from dateutil.relativedelta import relativedelta
+from app.models.loan_repayment_schedule import LoanRepaymentSchedule  # Make sure this import exists
+
 
 
 class Loan(db.Model):
@@ -47,6 +50,13 @@ class Loan(db.Model):
         back_populates="loan",
     )
 
+    loan_repayent_schedules = relationship(
+        "LoanRepaymentSchedule",
+        primaryjoin="Loan.id == LoanRepaymentSchedule.loan_id",
+        foreign_keys="LoanRepaymentSchedule.loan_id",
+        back_populates="loan",
+    )
+
     @classmethod
     def create_loan(
         cls,
@@ -60,6 +70,7 @@ class Loan(db.Model):
         upfront_fee,
         repayment_amount,
         installment_amount,
+        tenor,
         status="pending",
     ):
         # Check if customer exists
@@ -92,7 +103,6 @@ class Loan(db.Model):
             raise ValueError(f"Database integrity error: {err}")
         return loan
 
-
     @classmethod
     def has_active_loans(cls, customer_id):
         active_loans = cls.query.filter_by(