How to disable randomness in polyfactory?

[AndreiTapai]

I am attempting to use polyfactory to output a yaml template based on some deeply nested pydantic models. Right now, I am grappling with a behavior where some Optional fields are sometimes present in the output and other times completely missing. I would like values to be generated all the time for all fields. Is there a straightforward way to make this happen?

[Alc-Alc]

To answer the question in your title

How to disable randomness in polyfactory?

__random_seed__

To answer the question in your post

I would like values to be generated all the time for all fields. Is there a straightforward way to make this happen?

__allow_none_optionals__

You can combine these and it would ensure you always get the same non optional values

from dataclasses import dataclass
from polyfactory.factories import DataclassFactory


@dataclass
class Person:
    name: str | None


class PersonFactory(DataclassFactory[Person]):
    __model__ = Person
    __random_seed__ = 1
    __allow_none_optionals__ = False


person = PersonFactory.build()
print(person.name)