Issue with Specifying "Reask" for On-Fail in Guardrails Validators

[takeshiyagiuchi]

While testing validators from Guardrails Hub using Guard.rail_string, I encountered an issue where I couldn't find a way to specify "reask" as the on-fail action. I was using the Valid Choices validator (link) in Guardrails v0.5.12.

Here are the two approaches I tried:

1. Including "reask" as the on-fail argument in the validators attribute within the rail string:

<string
    name="affected area"
    description="What part of the body the symptom is affecting"
    format="valid-choices: ['head', 'neck', 'chest'] 'reask'"
/>

2. Using on-fail-valid-choices="reask" in the rail string:

 <string
    name="affected area"
    description="What part of the body the symptom is affecting"
    format="valid-choices: {['head', 'neck', 'chest']}"
    on-fail-valid-choices="reask"
/>

Observations

First Approach:

The current implementation doesn’t seem to support specifying on_fail directly in the way shown in approach 1. The validator attributes in the RAIL definition are passed through this section without including the on_fail attribute. Meanwhile, the parse_rail_validator method (link) returns a validator class that expects on_fail, leading to the following error:

TypeError: ValidChoices.__init__() got multiple values for argument 'on_fail'

Second Approach:

In this case, on-fail is set at this point in the code:
link. However, validator.rail_alias includes the prefix "guardrails/", as in "guardrails/valid-choices", which prevents it from matching the validator name, such as valid-choices. Even if I modify the RAIL string to use on-fail-guardrails_valid_choices="reask", I encounter another error:

File "/guardrails/actions/reask.py", line 578, in _gather_reasks_in_list del valid_output[idx]
                                                                             ~~~~~~~~~~~~^^^^^
IndexError: list assignment index out of range

Request for Guidance

Could you please advise on how I can properly specify the on-fail attribute for validators, specifically for using the "reask" action?

[takeshiyagiuchi]

I'm not sure why, but it's working now. The correct attribute name should be on-fail-guardrails_valid_choices.