[update]: repayment schedule table

app/api/services/provide_loan.py

@@ -71,6 +71,7 @@ class ProvideLoanService(BaseService):
                     upfront_fee = charges["upfront_payment"]
                     repayment_amount = charges["repayment_amount"]
                     installment_amount = charges["installment_amount"]
+                    tenor = offer.tenor // 30 # Convert to months
                     
 
 
@@ -97,7 +98,7 @@ class ProvideLoanService(BaseService):
 
                     db.session.flush()
 
-                    schedule = LoanRepaymentSchedule.add_repayment_schedule(loan = loan, Offer = offer, charges = charges)
+                    schedule = LoanRepaymentSchedule.add_repayment_schedule(loan = loan, tenor = tenor)
 
 
                     if not schedule:

app/models/loan_repayment_schedule.py

@@ -1,4 +1,5 @@
 from datetime import datetime, timezone
+from itertools import product
 from app.extensions import db
 from sqlalchemy.orm import relationship
 from dateutil.relativedelta import relativedelta
@@ -8,13 +9,14 @@ class LoanRepaymentSchedule(db.Model):
 
     id = db.Column(db.Integer, primary_key=True, autoincrement=True)
     loan_id = db.Column(db.Integer, nullable=False)
+    product_id = db.Column(db.String(20), nullable=True)
     installment_number = db.Column(db.Integer, nullable=False)
     due_date = db.Column(db.DateTime, nullable=False)
-    principal_amount = db.Column(db.Float, default=0.0)
+    installment_amount= db.Column(db.Float, default=0.0)
-    interest_amount = db.Column(db.Float, default=0.0)
+    total_repayment_amount = db.Column(db.Float, default=0.0)
-    total_installment = db.Column(db.Float, default=0.0)
     paid = db.Column(db.Boolean, default=False)
     paid_at = db.Column(db.DateTime, nullable=True)
+
     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))
 
@@ -27,19 +29,12 @@ class LoanRepaymentSchedule(db.Model):
 
 
     @classmethod
-    def add_repayment_schedule(cls, loan, Offer, charges):
+    def add_repayment_schedule(cls, loan, tenor):
         """
         Add repayment schedules for a given loan.
         """
-       
         now = datetime.now(timezone.utc)
         schedules = []
-        interest_fee = charges["interest"]
-
-        tenor = Offer.tenor // 30
-
-        principal = loan.initial_loan_amount / tenor
-        interest = interest_fee["fee"] / tenor
 
         for i in range(tenor):
             due_date = now + relativedelta(months=i + 1)
@@ -47,9 +42,9 @@ class LoanRepaymentSchedule(db.Model):
                 loan_id=loan.id,
                 installment_number=i + 1,
                 due_date=due_date,
-                principal_amount=round(principal, 2),
+                total_repayment_amount = round(loan.repayment_amount, 2),
-                interest_amount=round(interest, 2),
+                installment_amount=round(loan.installment_amount, 2),
-                total_installment=round(loan.installment_amount, 2)
+                product_id = loan.product_id
             )
             
             db.session.add(schedule)

migrations/versions/2a45dd99c9cb_migration_on_fri_apr_25_15_01_00_utc_.py

@@ -0,0 +1,42 @@
+"""Migration on Fri Apr 25 15:01:00 UTC 2025
+
+Revision ID: 2a45dd99c9cb
+Revises: 2cf0c177ca02
+Create Date: 2025-04-25 15:01:51.129681
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '2a45dd99c9cb'
+down_revision = '2cf0c177ca02'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('loan_repayment_schedules', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('product_id', sa.String(length=20), nullable=True))
+        batch_op.add_column(sa.Column('installment_amount', sa.Float(), nullable=True))
+        batch_op.add_column(sa.Column('total_repayment_amount', sa.Float(), nullable=True))
+        batch_op.drop_column('principal_amount')
+        batch_op.drop_column('interest_amount')
+        batch_op.drop_column('total_installment')
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('loan_repayment_schedules', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('total_installment', sa.DOUBLE_PRECISION(precision=53), autoincrement=False, nullable=True))
+        batch_op.add_column(sa.Column('interest_amount', sa.DOUBLE_PRECISION(precision=53), autoincrement=False, nullable=True))
+        batch_op.add_column(sa.Column('principal_amount', sa.DOUBLE_PRECISION(precision=53), autoincrement=False, nullable=True))
+        batch_op.drop_column('total_repayment_amount')
+        batch_op.drop_column('installment_amount')
+        batch_op.drop_column('product_id')
+
+    # ### end Alembic commands ###