---
title: "FieldMatrixRule – API-Referenz · Quittio"
description: "Mandatory and allowed fields of the selected profile (level L2), derived from the mapping attributes of the data model and the profile's additional requirements."
canonical_url: "https://quittio.dev/docs/api/Quittio/Core/Validation/Rules/FieldMatrixRule"
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  "twitter:image:alt": "Quittio: E-Rechnungen für PHP und Laravel. Rechtssicher, validiert, archiviert, mit geprüfter Beispielrechnung."
---

> Index of every page on this site: [llms.txt](https://quittio.dev/llms.txt)

[API reference](https://quittio.dev/docs/api) / [Quittio](https://quittio.dev/docs/api/Quittio) \\ [Core](https://quittio.dev/docs/api/Quittio/Core) \\ [Validation](https://quittio.dev/docs/api/Quittio/Core/Validation) \\ [Rules](https://quittio.dev/docs/api/Quittio/Core/Validation/Rules)

# FieldMatrixRule

final class in quittio/core · implements [`Rule`](https://quittio.dev/docs/api/Quittio/Core/Validation/Rule)

`Quittio\Core\Validation\Rules\FieldMatrixRule` · [Source](https://github.com/Quittio/quittio/blob/v0.7.1/packages/core/src/Validation/Rules/FieldMatrixRule.php#L28)

Mandatory and allowed fields of the selected profile (level L2), derived from the mapping attributes of the data model and the profile's additional requirements.

## Constants \#

| Constant | Value | Description |
| --- | --- | --- |
| `CODES` | `['QUITTIO-PROFILE-REQUIRED', 'QUITTIO-PROFILE-NOT-ALLOWED', 'QUITTIO-PROFILE-EXTENDED-ONLY', 'QUITTIO-PROFILE-XRECHNUNG-EXTENSION-ONLY', 'QUITTIO-PROFILE-SUBLIN …` | The codes of the findings this rule reports. |

## Methods \#

| Method | Description |
| --- | --- |
| `->check()` | |
| `->code()` | |
| `->level()` | |

### `check()`#

```
public function check(InvoiceData $invoice, ValidationContext $context): iterable
```

| Parameter | Type | Description |
| --- | --- | --- |
| `$invoice` | `[InvoiceData](https://quittio.dev/docs/api/Quittio/Core/Data/InvoiceData)` | |
| `$context` | `[ValidationContext](https://quittio.dev/docs/api/Quittio/Core/Validation/ValidationContext)` | |

<dl><dt>Returns</dt>
<dd><code>iterable</code></dd>
</dl>

### `code()`#

```
public function code(): string
```

<dl><dt>Returns</dt>
<dd><code>string</code></dd>
</dl>

### `level()`#

```
public function level(): ValidationLevel
```

<dl><dt>Returns</dt>
<dd><code><a href="https://quittio.dev/docs/api/Quittio/Core/Validation/ValidationLevel">ValidationLevel</a></code></dd>
</dl>

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