Question

In a DDD model, a Value Object should be immutable. Which of the following code snippets violates this principle?

Accepted Answer

class Money:
    def __init__(self, amount, currency):
        self.amount = amount
        self.currency = currency
    def change_amount(self, new_amount):
        self.amount = new_amount

Answer

class Money:
    def __init__(self, amount, currency):
        self.amount = amount
        self.currency = currency

Answer

class Money:
    def __init__(self, amount, currency):
        self._amount = amount
        self._currency = currency

Answer

class Money:
    def __init__(self, amount, currency):
        self._amount = amount
        self._currency = currency
    @property
    def amount(self):
        return self._amount

In a DDD model, a Value Object should be immutable. Which of the following code snippets violates this principle?

Step 1: Recall immutability in Value Objects

Step 2: Identify mutable code

Final Answer:

Quick Check:

Want More Practice?