---
title: "HasOneOptions"
source: "https://github.com/remix-run/remix/blob/8905f3943706e1f53696ab83e70a84873cabfc90/packages/data-table/src/lib/table.ts#L550"
---

# HasOneOptions

## Summary

Options for defining a [`hasOne`](/data-table/function/hasOne/) relation.

## Signature

```ts
type HasOneOptions<source, target> = {
  foreignKey?: KeySelector<target>
  targetKey?: KeySelector<source>
}

```