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---
title: توسيع الكائنات
description: أضِف حقولًا إلى كائنات Twenty القياسية (Person، Company، …) أو إلى كائنات من تطبيقات أخرى باستخدام defineField.
icon: wand-magic-sparkles
---
استخدم `defineField()` لإضافة حقل إلى كائن لا تملكه — كائن Twenty قياسي مثل Person أو Company، أو كائن يتم توفيره بواسطة تطبيق آخر مُثبَّت. على خلاف الحقول المضمّنة داخل [`defineObject`](/l/ar/developers/extend/apps/data/objects)، تتطلّب الحقول المستقلة `objectUniversalIdentifier` لتحديد الكائن الذي تقوم بتوسيعه.
```ts src/fields/company-loyalty-tier.field.ts
import { defineField, FieldType } from 'twenty-sdk/define';
export default defineField({
universalIdentifier: 'f2a1b3c4-d5e6-7890-abcd-ef1234567890',
objectUniversalIdentifier: '701aecb9-eb1c-4d84-9d94-b954b231b64b', // Company object
name: 'loyaltyTier',
type: FieldType.SELECT,
label: 'Loyalty Tier',
icon: 'IconStar',
options: [
{ value: 'BRONZE', label: 'Bronze', position: 0, color: 'orange' },
{ value: 'SILVER', label: 'Silver', position: 1, color: 'gray' },
{ value: 'GOLD', label: 'Gold', position: 2, color: 'yellow' },
],
});
```
## النقاط الرئيسية
* `objectUniversalIdentifier` يحدّد الكائن الهدف. بالنسبة لكائنات Twenty القياسية، استورد الثابت من `twenty-sdk`:
```ts
import { STANDARD_OBJECT_UNIVERSAL_IDENTIFIERS } from 'twenty-sdk/define';
// STANDARD_OBJECT_UNIVERSAL_IDENTIFIERS.company.universalIdentifier
// STANDARD_OBJECT_UNIVERSAL_IDENTIFIERS.person.universalIdentifier
// STANDARD_OBJECT_UNIVERSAL_IDENTIFIERS.opportunity.universalIdentifier
// …
```
* عند تعريف الحقول بشكل مضمّن **داخل `defineObject()`**، **لا** تحتاج إلى `objectUniversalIdentifier` — إذ يُورَّث من الكائن الأب.
* `defineField()` هي الطريقة الوحيدة لإضافة حقول إلى كائنات لم تُنشئها باستخدام `defineObject()`.
* موقع الملف متروك لك. المتعارف عليه هو `src/fields/\<name>.field.ts`، لكن حزمة SDK تكتشف الحقول في أي مكان داخل `src/`.
* يمكن أيضًا تعيين `writability` على مستوى الحقل: يقتصر السماح بالكتابة في حالة `MetadataWritability.APPLICATION` على دوال منطق تطبيقك نفسها، بينما يُخصَّص `MetadataWritability.SYSTEM` للبيانات المُدارة بواسطة المنصة. لا يمكن أن يكون مستوى قابلية الكتابة للحقل إلا أكثر تقييدًا من مستوى الكائن الذي ينتمي إليه، ولا تتأثر عمليات القراءة بذلك. راجع [Objects](/l/ar/developers/extend/apps/data/objects) للاطّلاع على الدلالات الكاملة.
* لإضافة علامة تبويب إلى تخطيط صفحة قياسي (مثل صفحة تفاصيل Task أو Company)، استخدم [`definePageLayoutTab`](/l/ar/developers/extend/apps/layout/page-layouts#definepagelayouttab) مع `STANDARD_PAGE_LAYOUT_UNIVERSAL_IDENTIFIERS` من `twenty-sdk/define`.
## إضافة علاقة إلى كائن موجود
لإضافة حقل علاقة (مثل ربط الكائن المخصّص بكائن قياسي `Person`)، استخدم `defineField()` مع `FieldType.RELATION`. النمط هو نفسه الخاص بالعلاقات المضمّنة لكن مع تعيين `objectUniversalIdentifier` صراحةً. اطّلع على [Relations](/l/ar/developers/extend/apps/data/relations) للنمط ثنائي الاتجاه.