0.1.6 (#2)

* Bumps version to 0.1.5.1

Updates the package version to 0.1.5.1 in pyproject.toml and uv.lock.

This increment addresses a minor release.

* Implements immutability for value objects

Ensures that value objects are immutable after initialization
by preventing attribute reassignment and deletion.
This enhances data integrity and prevents unintended modifications
to value object state.

* Bumps version to 0.1.6

Updates the package version to 0.1.6 in pyproject.toml and uv.lock.

This version bump reflects changes and improvements.

* Implements immutability for value objects

Ensures that value objects are immutable after initialization
by preventing attribute reassignment and deletion.
This enhances data integrity and prevents unintended modifications
to value object state.

* Bumps version to 0.1.6

Updates the package version to 0.1.6 in pyproject.toml and uv.lock.

This version bump reflects changes and improvements.

Author: josedejesuschavez

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "ddd-value-objects"
-version = "0.1.5.1"
+version = "0.1.6"
 description = "A collection of base classes for Domain-Driven Design (DDD) value objects and entities in Python"
 readme = "README.md"
 license = {text = "MIT"}

src/ddd_value_objects/composite_value_object.py

@@ -7,8 +7,26 @@
 
 class CompositeValueObject(ABC, Generic[T]):
     def __init__(self, value: T):
-        self._value = value
+        # Convert dictionary to a more immutable form if possible, 
+        # but at least prevent reassignment of _value
         self._ensure_value_is_defined(value)
+        object.__setattr__(self, '_value', dict(value))
+        object.__setattr__(self, '_initialized', True)
+
+    def __setattr__(self, name: str, value: Any) -> None:
+        if getattr(self, '_initialized', False):
+            raise TypeError(f"{self.__class__.__name__} is immutable")
+        object.__setattr__(self, name, value)
+
+    def __delattr__(self, name: str) -> None:
+        if getattr(self, '_initialized', False):
+            raise TypeError(f"{self.__class__.__name__} is immutable")
+        object.__delattr__(self, name)
+
+    @property
+    def value(self) -> T:
+        # Return a copy to prevent mutation of the internal dictionary
+        return dict(self._value)
 
     def equals(self, other: 'CompositeValueObject[T]') -> bool:
         return other.__class__ == self.__class__ and other.value == self._value
@@ -30,6 +48,3 @@ def _ensure_value_is_defined(self, value: Optional[T]) -> None:
         if value is None:
             raise InvalidArgumentError("Value must be defined")
 
-    @property
-    def value(self) -> T:
-        return self._value

src/ddd_value_objects/value_object.py

@@ -9,8 +9,19 @@
 
 class ValueObject(ABC, Generic[Primitives]):
     def __init__(self, value: Primitives):
-        self._value = value
+        object.__setattr__(self, '_value', value)
         self._ensure_value_is_defined(value)
+        object.__setattr__(self, '_initialized', True)
+
+    def __setattr__(self, name: str, value: Any) -> None:
+        if getattr(self, '_initialized', False):
+            raise TypeError(f"{self.__class__.__name__} is immutable")
+        object.__setattr__(self, name, value)
+
+    def __delattr__(self, name: str) -> None:
+        if getattr(self, '_initialized', False):
+            raise TypeError(f"{self.__class__.__name__} is immutable")
+        object.__delattr__(self, name)
 
     def equals(self, other: 'ValueObject[Primitives]') -> bool:
         return other.__class__ == self.__class__ and other.value == self._value