Adding sequence number for transactions and fixtures as well

api/app/transaction/resource.py

@@ -1,12 +1,21 @@
-from sqlmodel import select
+from sqlmodel import select, func
 
 from account.models import Account
 from transaction.models import Transaction, Split
 
 class TransactionResource:
     @classmethod
-    def create(cls, transaction, session):
+    def get_sequence_number(cls, session):
+        stmt = select(func.max(Transaction.sequence)).select_from(Transaction)
+
+        sequence = session.execute(stmt).first()
+
+        return sequence[0] + 1 if sequence[0] else 1
+
+    @classmethod
+    def create(cls, session, transaction):
         transaction_db = Transaction.model_validate(transaction)
+        transaction_db.sequence = cls.get_sequence_number(session)
         session.add(transaction_db)
         session.commit()
         session.refresh(transaction_db)