I am writing a Ruby Prefect client that’ll eventually allow our Rails app to schedule flows in Prefe...

Soren Daugaard

07/15/2021, 8:27 PM

I am writing a Ruby Prefect client that’ll eventually allow our Rails app to schedule flows in Prefect. When exploring the GraphQL schema I am noticing that there are 3 uuid types defined. They are called:

uuid

_uuid

and

UUID

. Their definitions look identical, all are

SCALAR

values. What is the purpose of having 3 different UUID types defined in the GraphQL schema?

Soren Daugaard

07/15/2021, 8:28 PM

Having these 3 types is unfortunately causing some problems when using the

graphql-client

gem to communicate with the Prefect API. The problem is name collisions when trying to define a

Uuid

class.

Soren Daugaard

07/15/2021, 8:29 PM

To see run

prefect server run

, go to:

localhost:4200

and execute:

Copy code

query {
  __schema {
    types {
      name
      kind
    }
  }
}

nicholas

07/15/2021, 9:06 PM

Hi @Soren Daugaard - the reason for those different types is that Hasura, GraphQL, and Python all expose different scalar types; because the API you're seeing is a composition of the 3 types you end up seeing all of the types.

Zanie

07/15/2021, 9:09 PM

https://github.com/hasura/graphql-engine/issues/3578 may be helpful for context

👍 1

Zanie

07/15/2021, 9:15 PM

We define (and use) and single

UUID

type to avoid complications with the auto-generated type.

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