'ordering@' => 0 does not work

[drzraf]

... because

toolbox/Blueprints/src/BlueprintForm.php

Line 438 in 8ad2b96

if ($location) {

keeps $order from being set if the location is 0 because the conditional does not distinguish between 0 and the empty string.

[drzraf]

As a consequence we can't order as the first element.
Documentation (https://learn.getgrav.org/17/forms/blueprints/advanced-features#changing-field-ordering) states that -1 should be used.

But using -1 triggers this:

toolbox/Blueprints/src/BlueprintForm.php

Lines 627 to 630 in 8ad2b96

	if ((string)(int)$ordering === (string)$ordering) {
	$location = array_search($item, $reordered, true) ?: 0;
	$rel = array_splice($reordered, $location, 1);
	array_splice($reordered, $ordering, 0, $rel);

... which, as expected by https://www.php.net/manual/en/function.array-splice.php put the extracted element at the end of the list.

[drzraf]

My suggestion is to not drop explicit 0 value. A quick way is changing line 438 by
if ($location || $location === 0) {