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105 lines
4.6 KiB
Plaintext
105 lines
4.6 KiB
Plaintext
---
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title: Objects
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description: Declare new record types — custom tables with their own fields — using defineObject.
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icon: "table"
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---
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Custom **objects** are new record types your app adds to a workspace — Post Card, Invoice, Subscription, anything specific to your domain. Each object declares its schema (fields, relations, default values) and a stable universal identifier that survives across syncs and deploys.
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```ts src/objects/post-card.object.ts
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import { defineObject, FieldType } from 'twenty-sdk/define';
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enum PostCardStatus {
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DRAFT = 'DRAFT',
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SENT = 'SENT',
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DELIVERED = 'DELIVERED',
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RETURNED = 'RETURNED',
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}
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export default defineObject({
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universalIdentifier: '54b589ca-eeed-4950-a176-358418b85c05',
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nameSingular: 'postCard',
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namePlural: 'postCards',
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labelSingular: 'Post Card',
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labelPlural: 'Post Cards',
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description: 'A post card object',
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icon: 'IconMail',
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fields: [
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{
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universalIdentifier: '58a0a314-d7ea-4865-9850-7fb84e72f30b',
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name: 'content',
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type: FieldType.TEXT,
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label: 'Content',
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description: "Postcard's content",
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icon: 'IconAbc',
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},
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{
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universalIdentifier: 'c6aa31f3-da76-4ac6-889f-475e226009ac',
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name: 'recipientName',
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type: FieldType.FULL_NAME,
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label: 'Recipient name',
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icon: 'IconUser',
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},
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{
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universalIdentifier: '95045777-a0ad-49ec-98f9-22f9fc0c8266',
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name: 'recipientAddress',
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type: FieldType.ADDRESS,
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label: 'Recipient address',
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icon: 'IconHome',
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},
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{
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universalIdentifier: '87b675b8-dd8c-4448-b4ca-20e5a2234a1e',
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name: 'status',
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type: FieldType.SELECT,
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label: 'Status',
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icon: 'IconSend',
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defaultValue: `'${PostCardStatus.DRAFT}'`,
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options: [
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{ value: PostCardStatus.DRAFT, label: 'Draft', position: 0, color: 'gray' },
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{ value: PostCardStatus.SENT, label: 'Sent', position: 1, color: 'orange' },
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{ value: PostCardStatus.DELIVERED, label: 'Delivered', position: 2, color: 'green' },
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{ value: PostCardStatus.RETURNED, label: 'Returned', position: 3, color: 'orange' },
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],
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},
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{
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universalIdentifier: 'e06abe72-5b44-4e7f-93be-afc185a3c433',
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name: 'deliveredAt',
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type: FieldType.DATE_TIME,
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label: 'Delivered at',
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icon: 'IconCheck',
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isNullable: true,
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defaultValue: null,
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},
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],
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});
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```
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## Key points
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- The `universalIdentifier` must be unique and stable across deployments.
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- Each field requires a `name`, `type`, `label`, and its own stable `universalIdentifier`.
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- The `fields` array is optional — you can define objects without custom fields.
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- Inline fields defined here do **not** need an `objectUniversalIdentifier` — it's inherited from the parent object. Use [`defineField()`](/developers/extend/apps/data/extending-objects) to add fields to objects you don't own.
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- You can scaffold new objects with `yarn twenty dev:add object`, which guides you through naming, fields, and relationships. See [Architecture → Scaffolding entities](/developers/extend/apps/getting-started/scaffolding).
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<Note>
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**Base fields are added automatically.** When you define a custom object, Twenty creates standard fields like `id`, `name`, `createdAt`, `updatedAt`, `createdBy`, `updatedBy`, and `deletedAt` for you. You don't need to declare them in your `fields` array — only your custom fields. You can override a default field by declaring one with the same name, but this is rarely a good idea.
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</Note>
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## Default values
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Literal string defaults must be wrapped in single quotes **inside** the string — `defaultValue: "'Draft'"`, not `defaultValue: "Draft"`. That's why the `status` field above uses `` `'${PostCardStatus.DRAFT}'` ``.
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Unquoted strings are reserved for computed defaults, evaluated when a record is created:
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- `'uuid'` — generates a UUID (for `UUID` fields)
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- `'now'` — the current timestamp (for `DATE_TIME` fields)
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The same convention applies to string sub-fields of composite defaults (e.g. `{ source: "'MANUAL'" }` on an `ACTOR` field) and to `SELECT`/`MULTI_SELECT` values. A literal string default left unquoted raises a warning when your app is built.
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## What's next
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- **Connect this object to others** — see [Relations](/developers/extend/apps/data/relations) for the bidirectional relation pattern.
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- **Add fields to objects from other apps** — see [Extending Objects](/developers/extend/apps/data/extending-objects) for `defineField()`.
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- **Display this object in the UI** — see [Views](/developers/extend/apps/layout/views) and [Navigation Menu Items](/developers/extend/apps/layout/navigation-menu-items) to put it in the sidebar.
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