import { util } from '@aws-appsync/utils'; import { get } from 'aws-appsync-resolver-helpers'; // your own helpers export function request(ctx: any) { return { operation: 'GetItem', key: util.dynamodb.toMapValues({ id: ctx.args.id }), }; }
schema: ../api/graphql/schema.graphql documents: src/**/*.graphql generates: src/generated/graphql.ts: plugins: - typescript - typescript-operations - typescript-react-apollo Now, when a developer runs npm run build in the web package, they always use the latest schema from the api package. No more out-of-sync copies. Your CI pipeline (GitHub Actions, GitLab CI) should enforce integration. Here is a typical workflow:
If you have ever worked on a project with multiple frontends (React, iOS, Android) talking to a single GraphQL API, you know the pain: Schema drift, duplicated resolver logic, and the "it works on my machine" syndrome for GraphQL transformations.
// packages/api/lib/appsync-stack.ts import * as appsync from 'aws-cdk-lib/aws-appsync'; import * as dynamodb from 'aws-cdk-lib/aws-dynamodb'; const api = new appsync.GraphqlApi(this, 'MyUnifiedApi', { name: 'UnifiedBlogApi', schema: appsync.Schema.fromAsset('graphql/schema.graphql'), // single source of truth }); appsync unified repo
// Attach a resolver using the new JS runtime postDS.createResolver('getPostResolver', { typeName: 'Query', fieldName: 'getPost', code: appsync.Code.fromAsset('graphql/resolvers/getPost.js'), runtime: appsync.FunctionRuntime.JS_1_0_0, }); In a unified repo, you can write resolvers in TypeScript and transpile them to the AppSync JS runtime. Store resolvers as .ts files and build them to resolvers/ during deployment.
In packages/web/package.json :
export function response(ctx: any) { return ctx.result; } import { util } from '@aws-appsync/utils'; import {
Start with a simple two-package structure ( api + one client), then expand. The tooling (CDK, GraphQL Codegen, npm workspaces) is mature enough for production today.
Because everything lives in packages/api , any frontend change that expects a new field forces you to update the resolver in the same PR . The magic of the monorepo happens in package.json scripts. After every schema change, regenerate all clients automatically.
Example resolver ( getPost.ts ):
Enter the (monorepo). By managing your AWS AppSync configuration—schema, resolvers (VTL or JavaScript), datasources, and even client code—in a single repository, you can enforce consistency, improve developer experience, and streamline CI/CD.
// DynamoDB datasource const postTable = new dynamodb.Table(...); const postDS = api.addDynamoDbDataSource('PostDS', postTable);
