0a37675f0e
- Add a new homepage to `book` project for the routing page - Move all main doc pages to be under `/v2/learn` (and added redirects + fixed links across docs) - Other: add admin components to resources dropdown + fixes to search on mobile. Closes DX-955 Preview: https://docs-v2-git-docs-router-page-medusajs.vercel.app/v2
40 lines
1.5 KiB
Plaintext
40 lines
1.5 KiB
Plaintext
export const metadata = {
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title: `${pageNumber} How to Extend Data Models`,
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}
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# {metadata.title}
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In this chapter, you'll learn about Medusa's alternative approach to extending data models.
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## Extend Models Alternative: Module Links
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Since modules are isolated from one another, it's not possible to directly extend a module's data models.
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Instead, you define a link between the modules' data models.
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### Why are Modules Isolated?
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Some of the module isolation's benefits include:
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- Integrate your module into any Medusa application without side-effects to your setup.
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- Replace existing modules with your custom implementation, if your use case is drastically different.
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- Use modules in other environments, such as Edge functions and Next.js apps.
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### How does Medusa Manage Module Links?
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When you define a link, the Medusa application creates a table in the database for it.
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Then, when you create a link between two records, the Medusa application stores the IDs of the linked records in that table.
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Medusa also provides the necessary tools to manage and query the linked records, which you'll learn about in the next chapters.
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---
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## Next Chapters: Link Brands to Products Example
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The next chapters continue the brands example. It shows you how to:
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- Link a brand, which you defined in a [previous example](../custom-features/module/page.mdx), to a product.
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- Manage linked records between the brands and products.
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- Extend Medusa's Create Product API route to link a product to a brand.
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- Query linked brands and products. |