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Amazon web services – 'ListBucketsCommand' is not assignable to parameter of type 'Command

using "@aws-sdk/client-s3": "^3.481.0", and keep getting the error at send line


      let S3_Config = {
          region: process.env.S3_REGION,
          credentials: {
            accessKeyId:  process.env.S3_ACCESS_KEY_ID,
            secretAccessKey: process.env.S3_ACCESS_SECRET_KEY,
      },
    };
    const s3_client = new S3Client(S3_Config);

    const s3_params = {
      Bucket: process.env.S3_BUCKET_NAME , // required
      MaxKeys: 20,
    };

    const _command = new ListBucketsCommand(s3_params);
    const response = await s3_client.send(_command);

Argument of type ‘ListBucketsCommand’ is not assignable to parameter
of type ‘Command<ServiceInputTypes, ServiceInputTypes,
ServiceOutputTypes, ServiceOutputTypes,
SmithyResolvedConfiguration>’. Type
‘ListBucketsCommand’ is missing the following properties from type
‘Command<ServiceInputTypes, ServiceInputTypes, ServiceOutputTypes,
ServiceOutputTypes, SmithyResolvedConfiguration>’:
input, middlewareStack, resolveMiddlewarets(2345)

This is the exact example as shown https://www.npmjs.com/package/@aws-sdk/client-s3?activeTab=readme

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2

Answers


  1. 0

    ListBucketsCommand in AWS SDK v3 doesn’t require any input parameters, so pass an empty object {} when creating the command.

    let S3_Config = {
  region: process.env.S3_REGION,
  credentials: {
    accessKeyId:  process.env.S3_ACCESS_KEY_ID,
    secretAccessKey: process.env.S3_ACCESS_SECRET_KEY,
  },

};
const s3_client = new S3Client(S3_Config);

const s3_params = {
    Bucket: process.env.S3_BUCKET_NAME , // required
    MaxKeys: 20,
};

const _command = new ListBucketsCommand({}); // No input params are needed for ListBucketsCommand
const response = await s3_client.send(_command);
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  2. 0

    Your code looks fine . Not sure why it is throwing error .

    But below there’s one alternate solution —

    import {
  S3
} from '@aws-sdk/client-s3';   

 const s3 = new S3({
            region: process.env.S3_REGION,
            credentials: {
              accessKeyId:  process.env.S3_ACCESS_KEY_ID,
              secretAccessKey: process.env.S3_ACCESS_SECRET_KEY,
      },
          });
    
   const response = await this.s3.listObjects({ Bucket: process.env.S3_BUCKET_NAME , MaxKeys:20 });

    Hope it helps .

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