[update]: Database schema

app/models/transaction.py

@@ -1,17 +1,16 @@
-from datetime import datetime
+from datetime import datetime, timezone
 from app import db
 
 class Transaction(db.Model):
     __tablename__ = 'transactions'
-    __table_args__ = {'schema': 'flask_app'} 
 
     id = db.Column(db.String(50), primary_key=True)
     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')
-    created_at = db.Column(db.DateTime, default=datetime.utcnow)
-    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    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))
 
     def __repr__(self):
         return f'<Transaction {self.id}>'