Return void from GraphQL Mutation

[zbhavyai]

Hello,

I am testing SmallRye GraphQL Mutations with Quarkus. I have a scenario where method in a service class returns void, and I would like to have similar setup with the GraphQL wrapper, where a mutation returns nothing after an operation is performed.

However, I am getting java.lang.RuntimeException: Failed to start quarkus at io.quarkus.runner.ApplicationImpl.<clinit>(Unknown Source) graphql.AssertException: type Void not found in schema when I try to compile the code.

I made a small reproducer to replicate the exception I am getting. It is available at https://github.com/zbhavyai/quarkus-graphql-void-reproducer.

I am using Quarkus versions 2.8.2.Final.

So, I would like to know, if it is a GraphQL limitation, or am I missing something? Because return void from a REST endpoint works absolutely fine.

Thank you.

[quarkus-bot[bot]]

/cc @jmartisk, @phillip-kruger

[phillip-kruger]

By default GraphQL does not support returning nothing. That being said, we should be able to add support for the Void object. You are welcome to open an issue for it in the SmallRye project.

[zbhavyai]

Thank you so much @phillip-kruger. I opened an issue here - smallrye/smallrye-graphql#1383.