Amplify Gen 2 circular dependency workaround

amplify_circular_dependency_workaround.ts

mport { defineBackend } from "@aws-amplify/backend";
import { EventSourceMapping, StartingPosition } from "aws-cdk-lib/aws-lambda";
import { DynamoEventSource } from "aws-cdk-lib/aws-lambda-event-sources";
import { auth } from "./auth/resource";
import { data } from "./data/resource";
import { myDynamoDBFunction } from "./functions/dynamoDB-function/resource";
import { Effect, Policy, PolicyStatement } from "aws-cdk-lib/aws-iam";
import { Stack } from "aws-cdk-lib";

const backend = defineBackend({
  auth,
  data,
  myDynamoDBFunction,
});



const todoTable = backend.data.resources.tables["Todo"];


backend.myDynamoDBFunction.resources.lambda.role?.attachInlinePolicy(
  new Policy(Stack.of(todoTable), "DynamoDBPolicy", {
    statements: [
      new PolicyStatement({
        effect: Effect.ALLOW,
        actions: [
          "dynamodb:DescribeStream",
          "dynamodb:GetRecords",
          "dynamodb:GetShardIterator",
          "dynamodb:ListStreams",
        ],
        resources: ["*"],
      }),
    ],
  })
);

new EventSourceMapping(Stack.of(todoTable), "test", {
  target: backend.myDynamoDBFunction.resources.lambda,
  eventSourceArn: todoTable.tableStreamArn,
  startingPosition: StartingPosition.LATEST,
});