Undefined index error for state when app deployed to GCP

[duyn-stanford]

I am getting this very frustrating undefined index error that only occurs when my app is deployed to GCP. Works fine locally (of course) but, in GCP, a state I have defined cannot be found and I get an undefined index error. For some reason, I have to modify the abstract state class, e.g., touch app/states/Idea/IdeaState.php (see code below). Then go into tinker to fetch the registered states, i.e., run php artisan tinker and then call Idea::getStates() to resolve the undefined index error. Anyone have any clue what is going on?

<?php


namespace App\States\Idea;


use Spatie\ModelStates\State;
use Spatie\ModelStates\StateConfig;

abstract class IdeaState extends State
{
    public static function config(): StateConfig
    {
        return parent::config()
            ->default(NewState::class)
            ->allowTransition(NewState::class, Assigned::class)
            ->allowTransition(Assigned::class, Unassigned::class)
            ->allowTransition([NewState::class, Assigned::class, Refinement::class, RequiresApproval::class], Review::class)
            ->allowTransition([Review::class, RequiresApproval::class], Refinement::class)
            ->allowTransition(Review::class, RequiresApproval::class)
            ->allowTransition(Review::class, Rejected::class)
            ->allowTransition(RequiresApproval::class, Planted::class)
            ->allowTransition(Planted::class, Completed::class);
    }

    abstract public function displayName(): string;

    abstract public function color(): string;
}

[duyn-stanford]

This was resolved by downgrading PHP version from 8.0 to 7.4 and manually registering states. Not sure if downgrading PHP was necessary.

<?php

namespace App\States\Idea;

use Spatie\ModelStates\State;
use Spatie\ModelStates\StateConfig;

abstract class IdeaState extends State
{
    public static function config(): StateConfig
    {
        return parent::config()
            ->default(NewState::class)
            ->allowTransition(NewState::class, Assigned::class)
            ->allowTransition(Assigned::class, Unassigned::class)
            ->allowTransition([NewState::class, Assigned::class, Refinement::class, RequiresApproval::class], Review::class)
            ->allowTransition([Review::class, RequiresApproval::class], Refinement::class)
            ->allowTransition(Review::class, RequiresApproval::class)
            ->allowTransition(Review::class, Rejected::class)
            ->allowTransition(RequiresApproval::class, Planted::class)
            ->allowTransition(Planted::class, Completed::class)
            ->registerState([
                NewState::class,
                Assigned::class,
                Unassigned::class,
                Refinement::class,
                RequiresApproval::class,
                Review::class,
                Rejected::class,
                Planted::class,
                Completed::class
            ]);
    }

    abstract public function displayName(): string;

    abstract public function color(): string;
}

[sebastiandedeyne]

Hey @duyn-stanford we just released a fix for this in 2.4.6.