[BUG] Get value with Buffer type doesn't work

Summary:

Getting an item which has a Buffer inside it doesn’t work.

Code sample:

const User = dynamoose.model('User', {
    "id": String,
    "data": Buffer,
});

new dynamoose.Table('User', [User]);

const item = await User.create({
    id: '1',
    data: Buffer.from('test'),
}, {
    overwrite: true
});

console.log(await item.toDynamo())
// { id: { S: '1' }, data: { B: <Buffer 74 65 73 74> } }

console.log(item.toJSON())
// { id: '1', data: { type: 'Buffer', data: [ 116, 101, 115, 116 ] } }

await User.get('1')

Current output and behavior (including stack trace):

TypeMismatch: Expected data to be of type buffer, instead found type object.
    at checkTypeFunction (/home/project/node_modules/dynamoose/dist/Item.js:316:27)
    at Array.map (<anonymous>)
    at Item.objectFromSchema (/home/project/node_modules/dynamoose/dist/Item.js:341:128)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Item.conformToSchema (/home/project/node_modules/dynamoose/dist/Item.js:526:28)
    at async /home/project/node_modules/dynamoose/dist/Model/index.js:723:40
    at async file:///home/project/index.mjs:19:1

Expected output and behavior:

The data should be returned correctly, in a JSON form.

Environment:

Operating System: Manjaro Operating System Version: 21.2.6 Node.js version (node -v): v14.17.6 NPM version: (npm -v): 8.5.5 Dynamoose version: 3.0.0-beta.1

Other information (if applicable):

I’m not sure if this is useful but I found that you are missing this from utils/deep_copy.js:

// Handle Uint8Array
if(obj instanceof Uint8Array) {
    copy = new Uint8Array(obj);
    return copy;
}

Even with this it didn’t work, but maybe it’s a lead.

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 issue has not already been raised before
• I have searched the internet and Stack Overflow to ensure this issue hasn’t been raised or answered before
• I have tested the code provided and am confident it doesn’t work as intended
• I have filled out all fields above
• I am running the latest version of Dynamoose

[fishcharlie]

@Drarig29 Of course. Should be available in the latest beta. Let me know if you run into anymore issues.

[Drarig29]

Thank you @fishcharlie!