Adding property to objects before sending response

Question

I am trying to add another property to each object I receive from the DynamoDB table. I am trying to do this by altering each object in the Items array then adding the Items array to my responseBody. All I get in return is the original items without any new properties. This could be a product of me using the array functions or spread operator incorrectly, just kindly point out anything you may see. My lambda function is below:

const data = await documentClient.scan(params).promise();
    data.Items.map(item => {
      item = {
        ...item,
        control: control_id
      };
    });
responseBody = JSON.stringify(data.Items);

UPDATE: I solved my issue above by doing the following:

const data = await documentClient.scan(params).promise();
    data.Items.forEach(item => {
      item.control = control_id;
    });
responseBody = JSON.stringify(data);

Peter Huang · Accepted Answer · 2020-06-05 17:15:40Z

2

Javascript Array Map return new array. see Array Map

answered Jun 5, 2020 at 17:15

Peter Huang

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1 Comment

mspahr Over a year ago

okay, got it. I was under the impression it was altering it. Thanks

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