[update] Remove foreign key constraints

app/__init__.py

@@ -8,6 +8,7 @@ from app.errors import register_error_handlers
 from flask_sqlalchemy import SQLAlchemy
 from flask_migrate import Migrate
 
+
 db = SQLAlchemy()
 migrate = Migrate()
 
@@ -36,7 +37,7 @@ def create_app():
     # Error Handlers
     register_error_handlers(app)
     
-
+    from . import models
     # Database and Migrations
     db.init_app(app)
     

app/models/account.py

@@ -6,13 +6,22 @@ class Account(db.Model):
     __table_args__ = {'schema': 'flask_app'} 
 
     id = db.Column(db.String(50), primary_key=True)  
-    customer_id = db.Column(db.String(50), db.ForeignKey('customer.id'), nullable=False)
+    customer_id = db.Column(db.String(50), nullable=False)
     account_type = db.Column(db.String(50))
     status = db.Column(db.String(20), default='active')
     lien_amount = db.Column(db.Float, default=0.0)
     created_at = db.Column(db.DateTime, default=datetime.utcnow)
     updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
 
+    # Database relationship
+    # customer = db.relationship(
+    #     'Customer',
+    #     primaryjoin='Account.customer_id == Customer.id',
+    #     backref='accounts',
+    #     foreign_keys=[customer_id],
+    #     viewonly=True
+    # )
+
     def __repr__(self):
         return f'<Account {self.id}>'
     

app/models/customer.py

@@ -11,5 +11,6 @@ class Customer(db.Model):
     created_at = db.Column(db.DateTime, default=datetime.utcnow)
     updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
 
+
     def __repr__(self):
         return f'<Customer {self.id}>'

app/models/loan.py

@@ -7,8 +7,8 @@ class Loan(db.Model):
     __table_args__ = {'schema': 'flask_app'} 
 
     id = db.Column(db.String(50), primary_key=True) 
-    customer_id = db.Column(db.String(50), db.ForeignKey('customer.id'), nullable=False)
-    account_id = db.Column(db.String(50), db.ForeignKey('account.id'), nullable=False)
+    customer_id = db.Column(db.String(50), nullable=False)
+    account_id = db.Column(db.String(50), nullable=False)
     product_id = db.Column(db.String(20), nullable=False)
     principal_amount = db.Column(db.Float, nullable=False)
     status = db.Column(db.String(20), default='pending')

app/models/transaction.py

@@ -6,7 +6,7 @@ class Transaction(db.Model):
     __table_args__ = {'schema': 'flask_app'} 
 
     id = db.Column(db.String(50), primary_key=True)
-    account_id = db.Column(db.String(50), db.ForeignKey('account.id'), nullable=False)
+    account_id = db.Column(db.String(50), nullable=False)
     type = db.Column(db.String(50), nullable=False)
     amount = db.Column(db.Float, nullable=False)
     status = db.Column(db.String(20), default='pending')