Cannot use Pydantic `BaseModel` class for models about transitions HOT 2 CLOSED

Hello @mcvady,

transitions decorates models with trigger and state check methods as well as a generic trigger method to process events by name. I am not super familiar with pydantic but it seems like BaseModel does not allow to set attributes that haven't been explicitly defined. One way to deal with this is to allow extra attributes during model initialisation:

from pydantic import BaseModel, ConfigDict
from transitions import Machine


class Matter(BaseModel):
    model_config = ConfigDict(extra='allow')
    name: str


lump = Matter(name="Mr. Lumpy")

machine = Machine(model=lump)

Maybe there are ways in pedantic to define dynamically added attributes. Maybe it's even possible to define a model and pass it -- like for instance DocMachine -- to transitions for machine configuration. Currently, I would not say that this is a bug but rather the way transitions operates.

from transitions.

Closing this since there has been no feedback for over 2 weeks. Feel free to comment if the issue still persists. I will reopen the issue if necessary.

from transitions.