__str__ and __repr__ are squashed on child classes

[khaeru]

After #884, a child class of a model does not inherit its parent's __str__ and __repr__ overloads.

import pydantic

class Foo(pydantic.BaseModel):
    x: int = 3
    y: float = 4.2

    def __str__(self):
        return str(self.y + self.x)


f = Foo()
# Expected: 7.2
# Observed: 7.2
print(str(f))


class Bar(Foo):
    z: bool = False


b = Bar()

# Expected: 7.2
# Observed: x=3 y=4.2 z=False
print(str(b))

• OS: Ubuntu 19.10
• Python version import sys; print(sys.version): 3.7.5 (default, Nov 20 2019, 09:21:52) [GCC 9.2.1 20191008]
• Pydantic version import pydantic; print(pydantic.VERSION): 1.1.1

[samuelcolvin]

thanks for reporting, should be fixed in #1023, please check that works for you.