GraphQL Gateway

Relational Queries & Graph Traversal

Fetch relational data models in a single network round-trip. Resolve complex entity links (Users → Posts → Comments → Todos) without experiencing the N+1 problem or payload over-fetching.

Interactive Query Runner

Select a relational pattern below to populate the interactive console and test queries against the live schema:

Execute: Deep Post Graph (Author + Comments)

POST

response.json

{

// Click "Send" above to execute this request against the live server.

}

N+1 Problem: REST vs. GraphQL Gateway

How graph query batching reduces latency and bandwidth when retrieving related resource hierarchies:

Traditional REST Architecture (N+1 Calls)

1GET /api/v1/posts?_limit=10 (1 request)
2GET /api/v1/users/:id for each author (10 requests)
3GET /api/v1/posts/:id/comments per post (10 requests)

Total: 21 HTTP round trips • High cellular latency • Redundant headers

Playground GraphQL Gateway (1 Single Call)

1Single POST /api/v1/graphql containing query document.
2Backend resolver fetches author and comments concurrently in memory.
3Exact fields returned: no unused author bio or post body bytes.

Total: 1 HTTP round trip • 75% smaller payload • Zero client waterfall

Supported Query Arguments & Filters

Every collection query in the Playground API schema accepts uniform pagination, sorting, and filter arguments:

Argument	Type	Applies To	Description
limit / _limit	Int	All collections	Controls the maximum number of items returned (default: 10, max: 100).
page / _page	Int	All collections	1-indexed page offset for pagination.
_sort / sort	String	All collections	Specifies the field name to order results by (e.g. `"title"`, `"id"`).
_order / order	String	All collections	Sort direction: `"asc"` or `"desc"`.
q	String	All collections	Full-text case-insensitive query searching across strings and text fields.
user_id / userId	ID	posts, todos	Filters results owned by a specific user author ID.
post_id / postId	ID	comments	Filters comments attached to a specific post thread ID.

Frontend Client Query Recipes

Production-tested data fetching hooks with caching and type safety:

useGraphQLQuery.tsx

// Apollo Client useQuery Hook Pattern (React 19 / Next.js)

import { useQuery, gql } from '@apollo/client';

const GET_POSTS_GRAPH = gql

query GetPostsGraph($limit: Int) {

posts(_limit: $limit) {

title

body

user {

name

}

comments {

body

}

;

export function PostsFeed() {

const { data, loading, error, refetch } = useQuery(GET_POSTS_GRAPH, {

variables: { limit: 5 },

notifyOnNetworkStatusChange: true,

});

if (loading) return <div>Loading relational graph...</div>;

if (error) return <div>Query error: {error.message}</div>;

return (

<div>

{data?.posts?.map((post: any) => (

<h3>{post.title}</h3>

<span>{post.comments?.length || 0} comments</span>

</article>

))}

<button onClick={() => refetch()}>Refresh Graph</button>

</div>

);

}

PreviousGraphiQL IDE

NextStateful Mutations