[Bug]: Carbon\Exceptions\InvalidFormatException

[haggaiwambua]

What happened?

A multiple date picker component returns selected dates as a comma-separated string like "2025-10-06,2025-10-13,2025-10-14,2025-10-23,2025-10-24 which is parsed as a string instead of an array. Using the dehydrateStateUsing() method to transform it doesn't work.

How to reproduce the bug

Add the following component to a form and submit it.

Flatpickr::make('days_not_worked')
  ->label('Days not worked')
  ->required()
  ->multiplePicker()
  ->altFormat('M j'),

Package Version

5.0.0

PHP Version

8.3.21

Laravel Version

v12.36.1

Which operating systems does with happen with?

macOS

Notes

No response

[jluitz]

I had the same issue with multiplePicker. It is caused by the getDefaultStateCasts() from DateTimePicker.

My quick fix is to override it in Flatpickr.php by adding this function:

public function getDefaultStateCasts(): array
{
    if ($this->isMultiplePicker()) {
        return $stateCasts= [];
    }

    return parent::getDefaultStateCasts();
}

Evidently for the rangePicker a different fix will be needed.

[remedix]

Any updates on this ? I have the same issue when using ->multiplePicker()