Subsequent structured Entry URLs are null due to blink

[jasonvarga]

Bug description

In a structured collection, if you were to create multiple entries, only the first one will have a URL.

This only occurs on the same request where you create them. Upon refreshing the page, they will all have URLs as expected.

How to reproduce

Have a structured collection, then create some entries.

$a = tap(Entry::make()->collection('pages')->etc())->save();
$b = tap(Entry::make()->collection('pages')->etc())->save();
$c = tap(Entry::make()->collection('pages')->etc())->save();

$a->url(); // outputs the url
$b->url(); // null
$c->url(); // null

Logs

No response

Versions

Statamic 3.2.30

Installation

Other (please explain)

Additional details

This is happening because we blink the tree contents here:

cms/src/Structures/Tree.php

Lines 44 to 55 in 496e918

	public function tree($tree = null)
	{
	return $this->fluentlyGetOrSet('tree')
	->getter(function ($tree) {
	$key = "structure-{$this->handle()}-{$this->locale()}-".md5(json_encode($tree));
	return Blink::once($key, function () use ($tree) {
	return $this->structure()->validateTree($tree, $this->locale());
	});
	})
	->args(func_get_args());
	}

[jasonvarga]

A workaround is to explicitly put the entries into the tree (which happens when you create an entry through the control panel).

$collection->structure()->in('en')
  ->append($one)
  ->append($two)
  ->append($three)
  ->save();