first commit

app/models/transaction.py

@@ -0,0 +1,53 @@
+from datetime import datetime, timezone
+from app.extensions import db
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy import and_, or_, not_
+
+class Transaction(db.Model):
+    __tablename__ = 'transactions'
+    id = db.Column(
+        db.Integer,
+        primary_key=True,
+        autoincrement=True,
+    )
+    #id = db.Column(db.Int, primary_key=True)
+    transaction_id = db.Column(db.String(50), nullable=False)
+    account_id = db.Column(db.String(50), nullable=False)
+    type = db.Column(db.String(50), nullable=False)
+    channel = db.Column(db.String(50), nullable=False)
+    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}>'
+
+    @classmethod
+    def create_transaction(cls, transaction_id, account_id, type, channel):
+
+        # if cls.query.filter_by(transaction_id=transaction_id).first():
+        #     raise ValueError("Duplicate Transaction")
+
+        if cls.query.filter( and_( cls.transaction_id ==transaction_id, cls.type==type) ).first():
+            raise ValueError("Duplicate Transaction")
+
+
+
+        transaction = cls(
+            transaction_id=transaction_id,
+            account_id=account_id,
+            type=type,
+            channel=channel
+        )
+
+        try:
+            db.session.add(transaction)
+            db.session.commit()
+        except IntegrityError as err:
+            db.session.rollback()
+            raise ValueError(f"Database integrity error: {err}")
+
+        return transaction
+
+    @classmethod
+    def get_transaction_by_id(cls, transaction_id):
+        return cls.query.get(transaction_id)