DynamoDB - Put item if hash (or hash and range combination) doesn't exist

Question

Here are my use cases: I have a Dynamo table with a hash + range key. When I put new items in the table, I want to do a uniqueness check. Sometimes I want to guarantee th

Answer 1

You can use AND operation if your table has hash and range

'ConditionExpression' => 'attribute_not_exists(hash) AND attribute_not_exists(range)'