Error: dynamodb cannot read property 's' of undefined

A TypeError while reading S or s means the object being dereferenced is missing. With DynamoDB, check for an absent Item or attribute and confirm whether the client returns typed DynamoDB JSON or native values.

// Low-level GetItemCommand response:
const typedName = rawResponse.Item?.name?.S;

// DynamoDBDocumentClient GetCommand response:
const nativeName = documentResponse.Item?.name;

These snippets assume each response has already been awaited. The DynamoDB String type descriptor is uppercase S, not lowercase s. Document-client strings have no S wrapper. A Number uses N, so do not assume every attribute is a String.

GetItem omits Item when no record matches. ProjectionExpression can also omit name even when an item exists. Handle expected absence explicitly and validate required attributes. If decoding a stream record, check eventName and the configured view before reading NewImage or OldImage.

See typed versus native JSON and AWS documentation.