Serverless DynamoDB LocalとServerless Framework：Serverless Frameworkを使ったDynamoDB Localの設定方法

npm install --save-dev serverless

npx sls create --template aws-nodejs --path my-project

npm install --save-dev serverless-dynamodb-local

// serverless.yml
service: my-service

provider:
  name: aws
  runtime: nodejs16.x

functions:
  hello:
    handler: handler.hello

resources:
  Resources:
    DynamoDBTable:
      Type: AWS::DynamoDB::Table
      Properties:
        TableName: my-table
        AttributeDefinitions:
          - AttributeName: id
            AttributeType: S
        KeySchema:
          - AttributeName: id
            KeyType: HASH

plugins:
  - serverless-dynamodb-local

custom:
  dynamodb:
    start:
      port: 8000

npx sls dynamodb install

npx sls dynamodb start

// handler.ts
import { DynamoDB } from 'aws-sdk';

const dynamo = new DynamoDB.DocumentClient({
  region: 'ap-northeast-1',
  endpoint: '<http://localhost:8000>',
});

export const hello = async (event: any, context: any) => {
  const params = {
    TableName: 'my-table',
    Item: {
      id: '1',
      name: 'John Doe',
      age: 30,
    },
  };

  await dynamo.put(params).promise();

  return {
    statusCode: 200,
    body: JSON.stringify({
      message: 'Hello World!',
    }),
  };
};