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63 lines
1.9 KiB
ReStructuredText
63 lines
1.9 KiB
ReStructuredText
.. meta::
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:description: Manage remote schemas with Hasura
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:keywords: hasura, docs, remote schema
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.. _remote_schemas:
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Remote Schemas
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==============
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.. contents:: Table of contents
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:backlinks: none
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:depth: 1
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:local:
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Introduction
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------------
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Hasura gives you CRUD + realtime GraphQL APIs with authorization & access control. However, in many cases, you will
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need to write APIs (queries, mutations) that contain custom logic. For example, implementing a payment API, or
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querying data that is not in your database.
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Hasura has the ability to merge remote GraphQL schemas and provide a unified GraphQL API. Think of it
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like automated schema stitching. All you need to do is build your own GraphQL service and then provide the HTTP
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endpoint to Hasura. Your GraphQL service can be written in any language or framework.
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This is what Hasura running with "Remote schemas" looks like:
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.. thumbnail:: /img/graphql/core/remote-schemas/remote-schema-arch.png
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:class: no-shadow
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:width: 900px
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:alt: Architecture of Hasura with remote schemas
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Use cases
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---------
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- Custom business logic, like a payment API
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- Querying data that is not available in your database
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You can handle these use cases by writing resolvers in a custom GraphQL server
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and making Hasura merge this "remote schema" with the existing auto-generated
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schema. You can also add multiple remote schemas. Think of the merged schema as
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a union of top-level nodes from each of the sub-schemas.
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.. note::
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If you are looking for adding authorization & access control for your
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app users to the GraphQL APIs that are auto-generated via Hasura, head to
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:ref:`auth`
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Learn more
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----------
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.. toctree::
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:maxdepth: 1
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adding-schema
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remote-schema-relationships
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auth/index
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.. admonition:: Additional Resources
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Data Federation with Hasura - `Watch Webinar <https://hasura.io/events/webinar/data-federation-hasura-graphql/?pg=docs&plcmt=body&cta=watch-webinar&tech=>`__. |