> ## 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

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

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

![Hydration demo showing search results enriched with related data](https://mintcdn.com/meilisearch-6b28dec2/igQ8sHEg2D4g5aei/assets/images/demos/hydration-demo.png?fit=max\&auto=format\&n=igQ8sHEg2D4g5aei\&q=85\&s=467658100382c977735a018ecfe88b8f)

## Links

> [card] [Try the demo](https://demo-hydration.vercel.app/)
>
> See hydration in action

> [card] [Hydration guide](https://www.meilisearch.com/docs/capabilities/indexing/how_to/document_relations.md)
>
> Configure foreign keys in your index


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