---
title: "FieldDefinition – API-Referenz · Quittio"
description: "Metadata of one DTO field, read from its mapping attributes."
canonical_url: "https://quittio.dev/docs/api/Quittio/Core/Mapping/FieldDefinition"
locale: de
meta:
  "og:description": "Metadata of one DTO field, read from its mapping attributes."
  "og:image": "https://quittio.dev/og/quittio-de.jpg"
  "og:image:alt": "Quittio: E-Rechnungen für PHP und Laravel. Rechtssicher, validiert, archiviert, mit geprüfter Beispielrechnung."
  "og:image:height": "630"
  "og:image:type": image/jpeg
  "og:image:width": "1200"
  "og:title": "FieldDefinition – API-Referenz · Quittio"
  "twitter:image": "https://quittio.dev/og/quittio-de.jpg"
  "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) \\ [Mapping](https://quittio.dev/docs/api/Quittio/Core/Mapping)

# FieldDefinition

final readonly class in quittio/core

`Quittio\Core\Mapping\FieldDefinition` · [Source](https://github.com/Quittio/quittio/blob/v0.7.1/packages/core/src/Mapping/FieldDefinition.php#L12)

Metadata of one DTO field, read from its mapping attributes.

## Properties \#

| Property | Type | Description |
| --- | --- | --- |
| `$bt` readonly | `?string` | |
| `$cardinality` readonly | `?string` | |
| `$cii` readonly | `?string` | |
| `$class` readonly | `class-string` | |
| `$computed` readonly | `bool` | |
| `$extendedOnly` readonly | `bool` | |
| `$internal` readonly | `bool` | |
| `$level` readonly | `[ProfileLevel](https://quittio.dev/docs/api/Quittio/Core/Profiles/ProfileLevel)` | |
| `$pdfOnly` readonly | `bool` | |
| `$property` readonly | `string` | |
| `$requiredIn` readonly | `list<string>` | |
| `$ubl` readonly | `?string` | |
| `$xrechnungExtensionOnly` readonly | `bool` | |

## Methods \#

| Method | Description |
| --- | --- |
| `->__construct()` | |
| `->isMandatory()` | |

### `__construct()`#

```
public function __construct(
    class-string $class,
    string $property,
    ?string $bt,
    ?string $cardinality,
    ProfileLevel $level,
    list<string> $requiredIn,
    bool $extendedOnly,
    bool $xrechnungExtensionOnly,
    bool $computed,
    bool $pdfOnly,
    bool $internal,
    ?string $cii,
    ?string $ubl,
)
```

| Parameter | Type | Description |
| --- | --- | --- |
| `$class` | `class-string` | |
| `$property` | `string` | |
| `$bt` | `?string` | |
| `$cardinality` | `?string` | |
| `$level` | `[ProfileLevel](https://quittio.dev/docs/api/Quittio/Core/Profiles/ProfileLevel)` | |
| `$requiredIn` | `list<string>` | |
| `$extendedOnly` | `bool` | |
| `$xrechnungExtensionOnly` | `bool` | |
| `$computed` | `bool` | |
| `$pdfOnly` | `bool` | |
| `$internal` | `bool` | |
| `$cii` | `?string` | |
| `$ubl` | `?string` | |

### `isMandatory()`#

```
public function isMandatory(): bool
```

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

```json
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```