我认为,DMS不支持将JSON的护卫直接改装为Dynamo地图。 这里的MS是,将JSON数据列为示意图,而不是转换为DynamoDB地图或清单类型。 但是,在移民之后,你可以在或

<>Before Migration:

• Process data in source db to convert JSON strings to a format that DMS can handle.
• Write a script (JS/Python) to read data from your source, transform JSON into DynamoDB map and then write to DynamoDB.

<><>><>>>>>>>>

<>After Migration:

• Read the data from DynamoDB, and then parse JSON string into Map, and then write back to DynamoDB.
• Write a script which itereate over every time in the DynamoDB table, retrieve the string data, convert it into a Map, and then update item in the DynamoDB.

下面是AWS SDK后处理案例的Nodejs。

const AWS = require( aws-sdk );

AWS.config.update({
  region: "your_region",
  // Add your credentials
});

const dynamodb = new AWS.DynamoDB.DocumentClient();
const tableName =  your_table ; // replace with your table name

const scanAndProcessItems = async (startKey) => {
  try {
    const params = {
      TableName: tableName,
      ExclusiveStartKey: startKey
    };
    
    const data = await dynamodb.scan(params).promise();
    
    if (data.Items) {
      for (let item of data.Items) {
        // To parse JSON strings into DynamoDB Maps
        item.createdBy = JSON.parse(item.createdBy);
        item.modifiedBy = JSON.parse(item.modifiedBy);
        item.preferences = JSON.parse(item.preferences);
    
        // To write the item back to the table
        await dynamodb.put({ TableName: tableName, Item: item }).promise();
      }
    }
    
    // If there s more data to scan, it will recursively call this function
    if (data.LastEvaluatedKey) {
      await scanAndProcessItems(data.LastEvaluatedKey);
    }
    
  } catch (err) {
    console.error("An error occurred", err);
  }
};

scanAndProcessItems();

希望这将有助于你们。