如何将 DynamoDB JSON 转换为常规 Javascript object

Question

如何将 DynamoDB JSON object 转换为 JavaScript 中的常规 object？

示例 DynamoDB object：

{
 "key1": {
  "S": "val1"
 },
 "key2": {
  "S": "val2"
 },
 "key3": {
  "M": {
   "key4": {
    "M": {
     "key5": {
      "S": "val5"
     }
    }
   }
  }
 },
 "key6": {
  "S": "val6"
 }
}

预计 output：

{
 "key1": "val1",
 "key2": "val2",
 "key3": {
  "key4": {
   "key5": "val5"
  }
 },
 "key6": "val6"
}

Answer 1

您可以在@aws-sdk/util-dynamodb library 中使用unmarshall function 。

const { unmarshall } = require("@aws-sdk/util-dynamodb");

const regularObject = unmarshall(dynamoObject);

console.log(regularObject); // Will output converted object

Answer 2

我在这里找到了类似的解决方案：

https://github.com/dangerfarms/unmarshall-dynamodb-json

https://dangerfarms.github.io/unmarshall-dynamodb-json/

解组行看起来像这样：

AWS.DynamoDB.Converter.unmarshall(dynamodbJson)