__post_init__ is not triggered for descendant dataclass #739
Description
The __post_init__ method of parent is not called in child classes.
- OS: Ubuntu
- Python version
import sys; print(sys.version): **3.7.2 (default, Mar 25 2019, 19:29:53) ** - Pydantic version
import pydantic; print(pydantic.VERSION): 0.32.1
from dataclasses import dataclass, field
from typing import Any
# comment the pydantinc import below to see the expected result
from pydantic.dataclasses import dataclass
@dataclass
class Base:
x: float
y: float
def __post_init__(self):
print('Called!')
self.z = self.x + self.y
@dataclass
class Child(Base):
a: int
obj = Child(a=0, x=1.5, y=2.5)
print(obj.z)Everything works fine when using the dataclass from standard library. After looking through the code I expected that an easy workaround would be to add simple __post_init__ in child:
@dataclass
class Child(Base):
a: int
def __post_init__(self):
super().__post_init__()Now I do get 'Called!' message, but the 'z' attribute is not preserved anyway...
Do I miss something obvious in the usage of pydantic?