Update Error: Only one resolver is allowed per field

[rraczae]

Hey Guys!

Thanks for the transformer, great idea and approach. We are trying to add a custom transformer to a datasource that was already pushed with the default amplify resolvers. Now we are getting the error:

Resource Name: QueryListTodosPipelineResolver (AWS::AppSync::Resolver)
Event Type: create
Reason: Only one resolver is allowed per field. (Service: AWSAppSync; Status Code: 400; Error Code: BadRequestException; Request ID: ...; Proxy:
null)

Our workaround was to make a change @model(query: null), then push, then add the transformer and everything works fine. Since this is not viable in a prod scenario, do you have any solutions/suggestions how to handle this?

Cheers!
Rob

[dror-laguna]

Thanks @rraczae for the input...
It seems that this is because of a known Amplify bug: aws/aws-appsync-community#128

I once had it too without using the firehose directive and was able to solve it as described in this comment (like what you did with query: null thing):
aws-amplify/amplify-cli#682 (comment)

[rraczae]

Hey @dror-laguna, thanks for the update. Yea it seems like we have to wait for that fix and until then we are creating our custom pipeline resolvers manually through custom templates.