rx.Field pydantic validation issues

[benedikt-bartscher]

Describe the bug

cc @adhami3310

E           pydantic.v1.error_wrappers.ValidationError: 1 validation error for TypedState
E           base
E             instance of Field expected (type=type_error.arbitrary_type; expected_arbitrary_type=Field)

To Reproduce

def test_typed_state() -> None:
    class TypedState(rx.State):
        base: rx.Field[str] = rx.field("")

    _ = TypedState(base="str")

Expected behavior no errror

Specifics (please complete the following information):

• Python Version: 3.13
• Reflex Version: main branch
• OS: arch

[linear[bot]]

ENG-3992 rx.Field pydantic validation issues

[adhami3310]

i assumed this would be the case, i can prob turn off validation for that type? or modify it?

anyways, how do you hit this in normal reflex code?

[benedikt-bartscher]

i assumed this would be the case, i can prob turn off validation for that type? or modify it?

anyways, how do you hit this in normal reflex code?

i am just hitting this in a pytest, seems not to happen at runtime

[benedikt-bartscher]

If the validation does not run during normal runtime, I would suggest disabling it for pytest as well. Otherwise, we could try to "unwrap" the annotation/type f.e. in __init_subclass__ in a way that pydantic recognizes the inner type

We could then add some tests for the new typed events and vars. Btw, this is awesome, thank you very much for the new typing experience (I just removed hundreds of ignore comments).

Unrelated to this issue, but could we add @rx.event typing for @rx.background? It currently works if I chain both decorators.

[adhami3310]

could we add @rx.event typing for @rx.background? It currently works if I chain both decorators

we're thinking of doing @rx.event(background=True), anyways you can make an issue so i remember to do this