respect-validation/library/Rules/KeyExists.php
Henrique Moody 1915b6fff7
Use paths to identify when a rule fails
When nested-structural validation fails, it's challenging to identify
which rule failed from the main exception message. A great example is
the `Issue796Test.php` file. The exception message says:

host must be a string

But you're left unsure whether it's the `host` key from the `mysql` key
or the `postgresql` key.

This commit changes that behaviour by introducing the concept of "Path."
The `path` represents the path that a rule has taken, and we can use it
in structural rules to identify the path of an array or object.

Here's what it looks like before and after:

```diff
-host must be a string
+`.mysql.host` must be a string
```

Because paths are a specific concept, I added a dot (`.`) at the
beginning of all paths when displaying them. I was inspired by the `jq`
syntax. I also added backticks around paths to distinguish them from any
other value.

I didn't manage to fix a test, and I skipped it instead of fixing it
because I want to make changes in how we display error messages as
arrays, and it will be easier to fix it then.
2024-12-27 23:28:35 +01:00

56 lines
1.2 KiB
PHP

<?php
/*
* Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
* SPDX-License-Identifier: MIT
*/
declare(strict_types=1);
namespace Respect\Validation\Rules;
use ArrayAccess;
use Attribute;
use Respect\Validation\Message\Template;
use Respect\Validation\Result;
use Respect\Validation\Rules\Core\KeyRelated;
use Respect\Validation\Rules\Core\Standard;
use function array_key_exists;
use function is_array;
#[Attribute(Attribute::TARGET_PROPERTY | Attribute::IS_REPEATABLE)]
#[Template(
'{{name}} must be present',
'{{name}} must not be present',
)]
final class KeyExists extends Standard implements KeyRelated
{
public function __construct(
private readonly int|string $key
) {
}
public function getKey(): int|string
{
return $this->key;
}
public function evaluate(mixed $input): Result
{
return new Result($this->hasKey($input), $input, $this, path: $this->key);
}
private function hasKey(mixed $input): bool
{
if (is_array($input)) {
return array_key_exists($this->key, $input);
}
if ($input instanceof ArrayAccess) {
return $input->offsetExists($this->key);
}
return false;
}
}