Quickstart¶

This guide walks through the core concepts of ascetic-ddd with minimal examples.

Core Concepts¶

ascetic-ddd provides building blocks for Domain-Driven Design:

• Aggregate roots with identity management

• Repository pattern for persistence

• Specification pattern for query criteria

• Saga for distributed transactions

• Outbox / Inbox for reliable messaging

Defining an Aggregate¶

from ascetic_ddd.seedwork.domain.aggregate import Aggregate

class Order(Aggregate):
    def __init__(self, order_id, customer_id, items):
        self._order_id = order_id
        self._customer_id = customer_id
        self._items = items

Using Specifications¶

Specifications allow you to express query criteria in a database-agnostic way:

from ascetic_ddd.specification.domain.lambda_filter.specification import LambdaFilterSpecification

active_orders = LambdaFilterSpecification(
    lambda order: order['status'] == 'active'
)

See the Modules section for detailed documentation of each module.