(aws-appsync): RdsDataSource misses option to set dataBaseName and expects incorrect cluster

[monholm]

It seems like there's no way to add the databasename to a RdsDataSource, which results in a "No database selected" error when running a resolver.

Besides that, RdsDataSource expects a DatabaseCluster and not a ServerlessCluster.

https://docs.aws.amazon.com/cdk/api/latest/docs/aws-appsync-readme.html#aurora-serverless seems outdated as well, and should probably be updated when a solution for the above-mentioned problems have been found. I will open a seperate issue for the doc issue, if/when this becomes relevant.

Reproduction Steps

const api = new GraphqlApi(stack, 'api', {
  name: 'graphqlApi',
  schema: Schema.fromAsset('./testSchema.graphql'),
});

const serverless = new ServerlessCluster(stack, 'cluster', {
  engine: DatabaseClusterEngine.AURORA_MYSQL,
  vpc: new Vpc(stack, 'vpc'),
});

api.addRdsDataSource('rdsDS', serverless, serverless.secret!);

What did you expect to happen?

addRdsDataSource to include a prop for databaseName and to expect IServerlessCluster.

What actually happened?

There's no prop for databaseName and it expects IDatabaseCluster.

Environment

• CDK CLI Version : 1.83.0
• Framework Version: 1.83.0
• Node.js Version: 14.5.4
• OS: MacOs 10.15.7
• Language (Version): TypeScript (3.9.7)

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This is 🐛 Bug Report

[monholm]

Having had a look at the relevant code, I might be able to take a stab at it, if someone could confirm that I'm not missing anything obvious.

[github-actions]

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[BerndWessels]

this is still not resolved in "@aws-cdk/aws-appsync": "^1.89.0", and renders RdsDataSource useless.