cmwhited / apollo-datasource-dynamodb Goto Github PK

It would be great to allow clients access to the LastEvaluatedKey returned as part of a DynamoDB query so that they can paginate if required

Hey Chris,

Thanks for writing this datasource. Have enjoyed using it in my project. There has come a need for us to do batchWrite/ transactWrite in our project and I love the way your code has an inbuilt datasource cache. Are there any plans to add this additional functionality to your repo?

Cheers,
jack

I've created a subclass and upon first calling getMyItem it calls the inherited getItem which is implemented through the caching mechanism which isn't initialized unless initialize is explicitly called. It looks like reasonable defaults are specified so it seems like it could work without requiring the initialize call. In my own code I had to do the following:

export var CHPDS = new CHPIncidentsDS(defaultConfiguration);
CHPDS.initialize({ context: CHPDS.dynamoDbDocClient, cache: new InMemoryLRUCache() });

I see in the cache class that "new InMemoryLRUCache()" is the default value but when calling initialize the complier won't let me only pass the "context" key therefore the default for the cache param isn't used.

Can we extend the constructor to allow clients to provide the DDB client? This can serve as an optimization if used with dependency injection.

Hi team,
Thanks for this amazing library. Is there a possibility to add support for AWS SDK v3?

I'm curious why getItem throws an error vs returning a nullable.

The query method in DynamoDBDataSource is only setting the items in cache. It would be good to see it read from the cache before it hits the DynamoDB.

Only getItem seems to be reading the cache currently.

Hi @cmwhited,
Thanks for publishing this repo, I'm looking at it for a project I'm working on.

This is a relatively minor nit but in the example subclass the code calls super but refers to "this" which isn't available at that time. In my code I've specified these two params as static members of my class.

I have created following class:

export default class AccountTable extends DynamoDBDataSource<AccountItem> {
  constructor(config?: ClientConfiguration) {
    super(this.tableName, this.tableKeySchema, config);
  }

  private readonly tableName = 'accounts';
  private readonly tableKeySchema: DocumentClient.KeySchema = [
    {
      AttributeName: 'accountId',
      KeyType: 'HASH',
    },
  ];
}

But I got the following error:

'super' must be called before accessing 'this' in the constructor of a derived class.ts(17009)

Do you have an solution for this? Thanks!