DynamoDB docClient scan does not respond - amazon-dynamodb

Question

I use DynamoDB with nodeJS on a Lambda function using serverless.
When I scan item from my local computer it works but when I deploy my function scan does not respond. No errors
const docClient = new AWS.DynamoDB.DocumentClient({
apiVersion: "2012-08-10",
});
const checkApiKey = async (apiKey, ) => {
try {
log.debug("before scan");
let result = await docClient
.scan({
"MY_TABLE",
FilterExpression: "#apiKey = :apiKey",
ExpressionAttributeNames: {
"#apiKey": "apiKey",
},
ExpressionAttributeValues: { ":apiKey": apiKey },
})
.promise();
log.debug("after scan");
} catch (error) {
log.error("Can not get dynamo object", { message: error.message });
throwError(error);
}
};
When I call this function on AWS, I can see in my log before scan but I don't see after scan nor error message from catch.
DynamoDB operations like "create" works fine.
I have been looking for a solution for several days ... Without success

Answer 1

I'm not sure if it's causing your problem, but the first thing that stuck out to me is how you are defining the table name in the call to scan:
.scan({
"MY_TABLE",
...
According to the docs, that should be a key/value pair
.scan({
TableName: "MY_TABLE",
...
If you are using the Serverless Framework, do you get different results if you run the function local vs remote?
For example, running the function locally from the command line:
sls invoke local --function <FUNCATION NAME from serverless.yml>
vs running the function remotely (in AWS) from the command line
sls invoke --function <FUNCATION NAME from serverless.yml>

Answer 2

Please try to add the callbacks for the promise of await docClient.scan().promise()
I mean:
let result = await docClient
.scan({
TableName: "MY_TABLE",
FilterExpression: "#apiKey = :apiKey",
ExpressionAttributeNames: {
"#apiKey": "apiKey",
},
ExpressionAttributeValues: { ":apiKey": apiKey },
})
.promise()
.then(data => console.log)
.catch(error => console.error)
and check the result, maybe then the picture became clear.