GraphQL: how to know which fields are requested ?

[cscetbon]

Amplify CLI Version

12.12.4

Question

I'm using aws amplify with a lambda function as a AppSync resolver. In my schema I'm not using a model as I'm using another database than DynamoDB. When I get the event passed to my lambda, I don't see the requested fields, is there anything to do in order to have access to this information and request only those specific fields instead of querying everything from my database ? I don't see anything mentioned at https://docs.amplify.aws/gen1/javascript/build-a-backend/graphqlapi/custom-business-logic/#structure-of-the-function-event

[cscetbon]

Found it ! I just needed to override the generate request template and put

      "selectionSetList": $util.toJson($ctx.info.selectionSetList),

The reason it was not there is because it's not serializable in $ctx.info by default !

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