serverless-graphql | serverless app using Node.js , AWS Lambda | Runtime Evironment library

There is this great repository with example implementations of different serverless scenarios.

Right now I'm struggling with the combination of AppSync and Amazon RDS. I tried the implementation of the standalone rds, and the appsync examples provided in the repository. These are working like a charm. But obviously there are many differences and difficulties if you'd like to combine these technologies. I used the schema, resolver and handler functions from the rds directory and combined it with the appsync lambda implementation. I adjusted the mapping templates and updated the serverless.yml file.

I could successfully deploy the whole appsync service and all resources without any errors. I'm able to access the graphql endpoint from graphiql and do my queries. But when I try it from the appsync console I get null as a response. I guess it has something to do with the mapping templates, but I'm not quite sure.

Has anybody got any suggestions or maybe a working example of this specific combination?

Ok, I'm on this problem since a few days.

I try to take this tutorial : https://serverless.com/blog/make-serverless-graphql-api-using-lambda-dynamodb/

And make it work with apollo-server-lambda. This tutorial help:

https://medium.com/vessels/apollo-server-serverless-graphql-bliss-68e8e15195ac

The problem is that nothing is working (for me) when you tried to use apollo server lambda with a real connection with DynamoDB. I got a list of errors that i can't remember anymore, it's just discouraging.

Here my code :

Here's a reference setup of AWS Lambda and Serverless and GraphQL that i'm following:

https://github.com/serverless/serverless-graphql-apollo

I'm trying with yarn run start-server-lambda:offline to start the project offline, it does start without any problems, but upon navigating to /graphiql, I get this: