📊 Expense Tracker Architecture

Full-Stack Operational Interface Simulator & Relational Database Previewer

Monthly Budget

₹50,000.00

Total Expenses

₹0.00

Remaining Balance

₹50,000.00

Transaction Title

Category

Amount (INR)

📝 Live Transaction Ledger

Description Title	Category Classification	Amount Metric

🗄️ Relational Database Entity Model (SQLAlchemy / SQLite)

This data schema illustrates the exact persistent Object-Relational Mapping (ORM) schema used to model user transactions:

class Transaction(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100), nullable=False)
    category = db.Column(db.String(50), nullable=False)
    amount = db.Column(db.Float, nullable=False)
    timestamp = db.Column(db.DateTime, default=datetime.utcnow)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)