django-sequences

import os from django.db import transaction from sequences import get_next_value # Assume 'Invoice' is a Django model with an 'number' field # from invoices.models import Invoice # For demonstration, we'll mock a model and save operation class MockInvoice: _instances = [] def __init__(self, number): self.number = number print(f"Created MockInvoice with number: {self.number}") MockInvoice._instances.append(self) def create_invoice_with_sequence(sequence_name='invoice_numbers'): try: with transaction.atomic(): next_invoice_number = get_next_value(sequence_name) # Replace with your actual model creation: # Invoice.objects.create(number=next_invoice_number) MockInvoice(number=next_invoice_number) print(f"Successfully committed invoice with number: {next_invoice_number}") except Exception as e: print(f"Transaction failed: {e}") # Example usage: create_invoice_with_sequence('orders') create_invoice_with_sequence('orders') create_invoice_with_sequence('shipments', initial_value=1000) create_invoice_with_sequence('shipments')