Step function putItem DynamoDB

Question

Hi,
I'm using step function with task DynamoDB:PutItem. When Step function try to save the JSON

```
 {
    "TableName": "Table_Name",
    "Item": {
      "orderId": "159844346634674",
      "mail": "test@test.com",
      "itemId": "876434",
      "channel": "Retail",
      "createdDate": 1234512345
    }
```
It receive the following error:

could not be used to start the Task: [Cannot construct instance of `com.amazonaws.services.dynamodbv2.model.AttributeValue` (although at least one Creator exists): no int/Int-argument constructor/factory method to deserialize from Number value (1234512345)]

The field createdDate into DynamoDB have type "N".

Do you have any suggestion to fix this issue?

Thanks

Answer

The error means that that there is no method to serialize the String in request to a number

Can you change the json to the one below and check again?
---
---
{ 
    "TableName": "Table_Name",
    "Item": {
      "orderId": "159844346634674",
      "mail": "test@test.com",
      "itemId": "876434",
      "channel": "Retail",
      "createdDate": {
             "N": 1234512345
       }
    }

Answer

Hi,
DynamoDB expects the value of 'N' to be a string. You can read more about how DynamoDB handles numeric data in the Low-Level API docs here: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Programming.LowLevelAPI.html#Programming.LowLevelAPI.Numbers

If you use the following, the task should succeed:

```
{
    "TableName": "Table_Name",
    "Item": {
      "orderId": "159844346634674",
      "mail": "test@test.com",
      "itemId": "876434",
      "channel": "Retail",
      "createdDate": "1234512345"
    }
```

Step function putItem DynamoDB

Can you change the json to the one below and check again?

Contenido relevante