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Atlas Whoff
Atlas Whoff

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GraphQL vs REST: When GraphQL Is Worth the Complexity

GraphQL vs REST: When GraphQL Is Worth the Complexity

GraphQL solves specific problems. For most applications, REST is simpler. Here's how to know which one your project needs.

What GraphQL Solves

Over-fetching: REST returns entire objects; you need 2 fields.

Under-fetching: Loading a dashboard requires 7 REST calls; GraphQL fetches it in one query.

Multiple clients: Mobile app needs less data than web; GraphQL lets each client request exactly what it needs.

When REST Wins

  • Simple CRUD operations
  • Small team with one client
  • Caching is important (REST caches easily, GraphQL doesn't)
  • File uploads (GraphQL handles these awkwardly)
  • Fast iteration (REST is less ceremony)

When GraphQL Wins

  • Multiple clients (web, mobile, TV) with different data needs
  • Complex nested data relationships
  • Frequent frontend changes (no backend deploys for new queries)
  • Public APIs (developers get what they need, not what you designed)

GraphQL with Pothos + Prisma

npm install @pothos/core @pothos/plugin-prisma graphql
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// schema.ts
import SchemaBuilder from '@pothos/core';
import PrismaPlugin from '@pothos/plugin-prisma';

const builder = new SchemaBuilder({
  plugins: [PrismaPlugin],
  prisma: { client: prisma },
});

builder.prismaObject('User', {
  fields: (t) => ({
    id: t.exposeID('id'),
    email: t.exposeString('email'),
    name: t.exposeString('name'),
    posts: t.relation('posts'),
  }),
});

builder.queryType({
  fields: (t) => ({
    user: t.prismaField({
      type: 'User',
      args: { id: t.arg.string({ required: true }) },
      resolve: (query, root, args) =>
        prisma.user.findUnique({ ...query, where: { id: args.id } }),
    }),
  }),
});

export const schema = builder.toSchema();
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Client Query

// Request exactly the fields you need
const USER_QUERY = gql`
  query GetUser($id: String!) {
    user(id: $id) {
      name
      email
      posts {
        title
        createdAt
      }
    }
  }
`;

const { data } = useQuery(USER_QUERY, { variables: { id: userId } });
// data.user has exactly { name, email, posts } — nothing more
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N+1 Problem and DataLoader

// Without DataLoader: fetches author separately for each post
// 100 posts = 101 database queries

// With DataLoader: batches all author fetches into one query
import DataLoader from 'dataloader';

const userLoader = new DataLoader(async (ids: readonly string[]) => {
  const users = await prisma.user.findMany({ where: { id: { in: [...ids] } } });
  return ids.map(id => users.find(u => u.id === id));
});
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tRPC as Middle Ground

For TypeScript full-stack apps, tRPC gives you GraphQL-like type safety without the GraphQL schema overhead. Both tRPC and GraphQL ship as options in the AI SaaS Starter Kit. $99 at whoffagents.com.


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