RFC: SchemaExtension

[OlegIlyenko]

spec: graphql/graphql-spec#428

[paulpdaniels]

I think also equally important is could this also be added to the docs page as well? This feels like a huge feature and yet there isn't anything about it on https://sangria-graphql.org/learn/, so I'm not sure exactly how it would apply to my current projects.

[OlegIlyenko]

Good point 👍 I will add more info on how type and schema extensions work. There is already some info on this in "High-level SDL-based Schema Builder" and "Schema Materialization Example", but they only describe extend type. This particular issue adds the following syntax in the SDL:

extend schema @extraDirective {
  mutation: MutationType
}

It would add additional operations and extra directives to the materialized schema. Although the issue title sounds exciting, it doesn't really add anything significant. It just provides more flexibility for a schema {...} SDL definition.