serverless.yml

---
service: realtime-chat

frameworkVersion: ">=1.21.0 <2.0.0"

plugins:
  - serverless-appsync-plugin

provider:
  name: aws
  region: eu-west-1

custom:
  awsAccountId: ${env:AWS_ACCOUNT_ID}
  appSync:
    name: realtimeChat
    apiKey: ${env:APPSYNC_API_KEY}
    apiId: ${env:APPSYNC_API_ID}
    authenticationType: API_KEY
    schema: schema/schema.graphql
    serviceRole: "AppSyncServiceRole" # AppSyncServiceRole is a role defined by amazon and available in all accounts
    mappingTemplatesLocation: mapping-templates
    mappingTemplates:
      - dataSource: Chat
        type: Mutation
        field: message
        request: Message.request.vtl
        response: ForwardResult.response.vtl
      - dataSource: Chat
        type: Subscription
        field: inbox
        request: Message.request.vtl
        response: ForwardResult.response.vtl
    dataSources:
      # https://docs.aws.amazon.com/appsync/latest/devguide/tutorial-local-resolvers.html
      - type: NONE  # use an AppSync local resolver
        name: Chat
        description: 'Paging forwarder'