Unable to PUT to DynamoDB from a Python Lambda function

Question

Im using a Lambda function to get and put data to DynamoDB.

I am able to put a new item into my table, but when I try to pass anything other than KEY I get the following error:

An error occurred (ValidationException) when calling the UpdateItem operation: 
The provided key element does not match the schema

This works (with key only):

"body": "{\"TableName\":\"myExampleTableName\",\"Key\":{\"id\": {\"S\": \"SomeID\"}}}"

This throws error(with key and some data):

"body": "{\"TableName\":\"myExampleTableName\",\"Key\":{\"id\": {\"S\": \"SomeID\"},\"Data\": {\"S\": \"MyDataExampleData\"}}}"

Although it seems to be the same syntax as the example shows here.

Anybody see what I am doing wrong?

Here's the my body in a more readable way:

{
    "TableName":"myExampleTableName",
    "Key":{
        "id": {"S": "SomeID"},
        "Data": {"S": "MyDataExampleData"}
    }
}

What sdk are you using?

jellycsc
– jellycsc

2020-08-10 23:39:49 +00:00
Commented Aug 10, 2020 at 23:39 — jellycsc
– jellycsc, Commented Aug 10, 2020 at 23:39

Guilherme Brabo · Accepted Answer · 2020-08-11 00:51:06Z

1

The "Data" field inside the "Key" doesn't seem right. It would be easier to understand if we had the actual code and the schema of the table you're trying to put.

This is an example using python, where you can see that there's no "Key" attribute, but "Item" (I'm assuming you're using python based on the doc you've sent)

https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GettingStarted.Python.03.html

response = table.put_item(
   Item={
        'year': year,
        'title': title,
        'info': {
            'plot': plot,
            'rating': rating
        }
    }
)

answered Aug 11, 2020 at 0:51

Guilherme Brabo

881 silver badge8 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Unable to PUT to DynamoDB from a Python Lambda function

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related