duplicate-value-from-relation

Directus interface that copies a value from a related item into the current field.

Useful when you have a relation (e.g. bank_account) and want another field on the same item to stay in sync with something on the related record (e.g. currency).

Install

Build the extension and make sure Directus can load it from your extensions folder:

npm install
npm run build

For local development:

npm run dev

Requires Directus ^10.10.0.

Usage

1. Add a field to your collection.
2. Set the interface to Duplicate Value From Relation.
3. Pick the Relation Field — the M2O field pointing at the other collection.
4. Pick the Source Field — the field on that related collection to copy from.

The field is read-only in the item editor. When the relation changes, the value updates automatically.

Match the field type to the source field (string, uuid, integer, etc.).

Example

Collection: invoices

• Relation field: bank_account → currency
• Synced field: currency
• Interface options:
  • Relation Field: bank_account
  • Source Field: currency

Selecting an account on an invoice will fill currency with that account's currency.

Supported types

string, text, integer, bigInteger, float, decimal, boolean, uuid, date, time, datetime, timestamp, json

Only many-to-one relations are supported for the relation field picker.