Appsync Repo

Modern applications rarely rely on a single data store. A single GraphQL query might need to combine user profiles from DynamoDB, product inventory from RDS, and live pricing from an external REST API. Without a repository layer, this logic would create bloated, nested resolvers. A well-designed repository pattern allows the creation of "composite repositories" that orchestrate calls to multiple underlying data sources, returning a unified, domain-friendly object.

: Mapping templates (often written in JavaScript or VTL) that tell AppSync how to translate GraphQL requests into actions for your database. Data Sources appsync repo

# supergraph.yaml subgraphs: users: url: https://users.appsync-api.aws.com/graphql products: url: https://products.appsync-api.aws.com/graphql Modern applications rarely rely on a single data store

import util from '@aws-appsync/utils';