Paul Rastoin
b2a4bb0e0c
## What
Adds a docs page teaching app developers how to reference auto-created
**system fields** (`createdAt`, `updatedAt`, `id`, …) from views and
other entities, and makes the API it documents real by exporting
`generateDefaultFieldUniversalIdentifier` from the SDK.
## Why
System fields are provisioned by the server, so they're never declared
with `defineField()` and have no importable `universalIdentifier`
constant. Since 2.19 their universal identifier is derived
deterministically from the application id, the object id and the field
name. Hardcoding an invented id fails sync with `INVALID_VIEW_DATA:
Field metadata not found` (this is exactly what broke the
twenty-partners `createdAt` view column).
The twenty-partners app already imports
`generateDefaultFieldUniversalIdentifier` from `twenty-sdk/define`, but
the function was never exported from the SDK. This PR adds the export
and documents the pattern.
## Changes
- **New page** `data/system-fields.mdx` — "Targeting System Fields":
- Lists the 8 system fields (`id`, `createdAt`, `updatedAt`,
`deletedAt`, `createdBy`, `updatedBy`, `position`, `searchVector`).
- Explains the deterministic derivation and the sync error from
hardcoding ids.
- Documents `generateDefaultFieldUniversalIdentifier({
applicationUniversalIdentifier, objectUniversalIdentifier, fieldName })`
with a full `defineView` example.
- Contrasts with standard objects (use
`STANDARD_OBJECT_UNIVERSAL_IDENTIFIERS.<object>.fields.<field>.universalIdentifier`)
and notes that `name` is a default, not system, field.
- **SDK export** — new `generate-default-field-universal-identifier.ts`
wrapping the existing `getFieldUniversalIdentifier` from
`twenty-shared/application` (`name` → `fieldName`), exported from
`define/index.ts`.
- Registered the page in `docs.json` (Data group) and cross-linked it
from the Views doc.
## Notes
`node_modules` isn't installed in this environment, so `nx typecheck`
wasn't run. The wrapper is a signature-matched pass-through and the
`twenty-shared/application` subpath + `getFieldUniversalIdentifier`
barrel export were both verified to exist.
---
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---------
Co-authored-by: github-actions <github-actions@twenty.com>
Twenty SDK
A CLI and SDK to develop, build, and publish applications that extend Twenty CRM.
Quick start
The recommended way to start is with create-twenty-app:
npx create-twenty-app@latest my-twenty-app
cd my-twenty-app
yarn twenty dev
Documentation
Full documentation is available at docs.twenty.com/developers/extend/apps:
- Getting Started — scaffolding, local server, authentication, dev mode
- Building Apps — entity definitions, API clients, testing, CLI reference
- Publishing — deploy, npm publish, marketplace
Guides in this repository:
- Logic function inputs — input schema inference, record-typed inputs, and the id contract
Manual installation
If you are adding twenty-sdk to an existing project instead of using create-twenty-app:
yarn add twenty-sdk twenty-client-sdk
Then add a twenty script to your package.json:
{
"scripts": {
"twenty": "twenty"
}
}
Run yarn twenty help to see all available commands.
Configuration
The CLI stores credentials per remote in ~/.twenty/config.json. Run yarn twenty remote:add to configure a remote, or yarn twenty remote:list to see existing ones.
Troubleshooting
- Auth errors: run
yarn twenty remote:addto re-authenticate. - Typings out of date: restart
yarn twenty devto refresh the client and types. - Not seeing changes in dev: make sure dev mode is running (
yarn twenty dev).
Contributing
Development setup
git clone https://github.com/twentyhq/twenty.git
cd twenty
yarn install
Development mode
npx nx run twenty-sdk:dev
Production build
npx nx run twenty-sdk:build
Running the CLI locally
npx nx run twenty-sdk:start -- <command>