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@graphql-tools/batch-delegate
Advanced tools
@graphql-tools/batch-delegate is a package that allows for efficient batching and delegation of GraphQL requests. It is part of the GraphQL Tools ecosystem and is designed to optimize the performance of GraphQL servers by reducing the number of network requests and improving the efficiency of data fetching.
Batching Requests
This feature allows you to batch multiple GraphQL requests into a single request, reducing the number of network calls and improving performance. The code sample demonstrates how to use the `batchDelegateToSchema` function to batch requests for user data based on their IDs.
const { batchDelegateToSchema } = require('@graphql-tools/batch-delegate');
async function batchRequests() {
const result = await batchDelegateToSchema({
schema,
operation: 'query',
fieldName: 'users',
key: 'id',
argsFromKeys: (keys) => ({ ids: keys }),
valuesFromResults: (results, keys) => results
});
return result;
}
Delegating Requests
This feature allows you to delegate a GraphQL request to another schema. The code sample demonstrates how to use the `delegateToSchema` function to delegate a request for user data to another schema.
const { delegateToSchema } = require('@graphql-tools/delegate');
async function delegateRequest() {
const result = await delegateToSchema({
schema,
operation: 'query',
fieldName: 'user',
args: { id: '1' }
});
return result;
}
Dataloader is a generic utility to batch and cache data-fetching calls. It is often used in GraphQL servers to optimize the performance of data fetching by batching and caching requests. Compared to @graphql-tools/batch-delegate, Dataloader is more generic and can be used outside of GraphQL contexts.
Apollo Server is a popular GraphQL server implementation that includes built-in support for batching and caching requests. It provides a more comprehensive solution for building GraphQL servers, including features like schema stitching and federation. Compared to @graphql-tools/batch-delegate, Apollo Server offers a broader set of features but may be more complex to set up.
Check API Reference for more information about this package; https://www.graphql-tools.com/docs/api/modules/batch_delegate_src
You can also learn more about Batch Delegation in this chapter; https://www.graphql-tools.com/docs/stitch-schema-extensions #batch-delegation
FAQs
A set of utils for faster development of GraphQL tools
The npm package @graphql-tools/batch-delegate receives a total of 139,525 weekly downloads. As such, @graphql-tools/batch-delegate popularity was classified as popular.
We found that @graphql-tools/batch-delegate demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
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