[FEATURE] Add NULL DynamoDB Attribute Type

Summary:

Dynamoose should support the DynamoDB NULL Attribute Type.

Other information (if applicable):

When we implement this we need to add the following test to Document.isDynamoObject:

{
    "input": {"id": {"S": "foo" }, "data": {"NULL": true}},
    "output": true
}

Related Issues:

• #878

Other:

• I have read through the Dynamoose documentation before posting this issue
• I have searched through the GitHub issues (including closed issues) and pull requests to ensure this feature has not already been suggested before
• I have filled out all fields above
• I am running the latest version of Dynamoose

[fishcharlie]

Could I please get some people to review and test #1061? I believe this should fix everyones issues. Remember to use the new dynamoose.NULL property type.

[ealiaga]

I had the same problem. I was able to safely save the document but couldn’t get it. I got the error “TypeMismatch: Expected key to be of type boolean, instead found type object.” Unfortunately it happened in production and I can’t wait for an improvement in Dynamoose. I solved it with the AWS SDK DynamoDB client.

I think Dynamoose is a great library that delivers a better developer experience than the AWS SDK, but this issue forced me to migrate to the AWS SDK.