DynamoDB字符串数组成为对象数组

Question

I insert an array of string to DynamoDB:

[13, 12, 12, 4]

It becomes Array of Objects when I view it in DynamoDB:

[ { "S" : "13" }, { "S" : "12" }, { "S" : "12" }, { "S" : "4" }]

Is it reasonable? Do I need to do something to make my data being inserted as array of string?

Here is how I put my array to DynamoDB:

var params = {
   TableName: "MatchDate",
   Item:{
      position: [1, 3, 4, 5]
   }
};

DynamoDBClient.put(params, function(err, data) {
   //Some other code
});

Answer 1

If you want a single object (an array of strings) you need to set your attribute type to String Set

Then you will get

"SS": ["13", "12" ,"12", "4"]

Or you can use Number Set

"NS": ["13", "12" ,"12", "4"]

EDIT: Try something like this in nodejs

var params = {
   TableName: "MatchDate",
   Item: {
   "position": {
      SS: [
         '12',
         '13',
         '4'
      ]
   }
};

DynamoDBClient.put(params, function(err, data) {
   //Some other code
});

Check here for AWS Refernce of Javascript putItem