Support `Literal` type in pydantic guards about guardrails HOT 5 CLOSED

Is this still needed? I'm interested in contributing.

from guardrails.

Hi @leifu1128, I talked about this with @ShreyaR, and we realized that an Enum type is unnecessary given the Choice datatype and valid-choices validator.

But one similar thing we would like is to support Literal types in guards created from pydantic models.

Here's a minimal code sample that throws an "Unsupported type" error:

from typing import Literal

from guardrails import Guard
from pydantic import BaseModel


class Model(BaseModel):
    type_: Literal["a", "b"]


Guard.from_pydantic(Model, prompt=...)

Let me know if this is something you're interested in picking up :)

from guardrails.

Is it possible currently to add a Enum or Literal -like validated field when creating a guard from pydantic model? I can use an explicit validator, but is there a nicer way to do it?

from guardrails.

Hey @irgolic. Sorry for the late response, just got back from vacation. Should I make it so create_xml_element_for_field converts Literal to string + valid-choices?

from guardrails.

Resolving as this is now available via https://www.guardrailsai.com/docs/defining_guards/strings

from guardrails.