> ## Documentation Index
> Fetch the complete documentation index at: https://www.meilisearch.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Hydration

> Search results enriched with related data from other indexes using foreign keys

<Info>
  **Live demo**: [demo-hydration.vercel.app/](https://demo-hydration.vercel.app/)
</Info>

Demonstrates how Meilisearch's foreign keys feature automatically replaces foreign IDs in search results with full documents from a referenced index.

<img src="https://mintcdn.com/meilisearch-6b28dec2/igQ8sHEg2D4g5aei/assets/images/demos/hydration-demo.png?fit=max&auto=format&n=igQ8sHEg2D4g5aei&q=85&s=467658100382c977735a018ecfe88b8f" alt="Hydration demo showing search results enriched with related data" width="2968" height="1624" data-path="assets/images/demos/hydration-demo.png" />

## Links

<CardGroup cols={2}>
  <Card title="Try the demo" icon="globe" href="https://demo-hydration.vercel.app/">
    See hydration in action
  </Card>

  <Card title="Hydration guide" icon="circle-nodes" href="/capabilities/indexing/how_to/document_relations">
    Configure foreign keys in your index
  </Card>
</CardGroup>