How to make a UUID in DynamoDB?

Question

In my db scheme, I need a autoincrement primary key. How I can realize this feature?

PS For access to DynamoDB, I use dynode, module for Node.js.

Answer 1

Addition to @yadutaf's answer

AWS supports Atomic Counters.

Create a separate table (order_id) with a row holding the latest order_number:

+----+--------------+
| id | order_number |
+----+--------------+
|  0 |         5000 |
+----+--------------+

This will allow to increment order_number by 1 and get the incremented result in a callback from AWS DynamoDB:

config={
  region: 'us-east-1',
  endpoint: "http://localhost:8000"
};
const docClient = new AWS.DynamoDB.DocumentClient(config); 

let param = {
            TableName: 'order_id',
            Key: {
                "id": 0
            },
            UpdateExpression: "set order_number = order_number + :val",
            ExpressionAttributeValues:{
                ":val": 1
            },
            ReturnValues: "UPDATED_NEW"
        };
        
       
docClient.update(params, function(err, data) {
   if (err) {
                console.log("Unable to update the table. Error JSON:", JSON.stringify(err, null, 2));
   } else {
                console.log(data);
                console.log(data.Attributes.order_number); // <= here is our incremented result
    }
  });