Does not support interfaces implementing other interfaces

The latest version of the spec allows you to have an interface extend another interface. This feature was also added to version 15 of graphql.

The example provided in the spec would allow you to do something like

interface Node {
  id: ID!
}

interface Resource implements Node {
  id: ID!
  url: String
}

interface Image implements Resource & Node {
  id: ID!
  url: String
  thumbnail: String
}

If you were to run the linter on a schema containing this, you will receive an error:

SyntaxError: Syntax Error: Unexpected Name “implements”

Perhaps of note is that this project upgraded to V15 not too long ago, but I suppose the linting of this new feature wasn’t something that came along for free with the upgrade.

[moberegger]

Gonna close this because I can’t reproduce it and don’t want to blame this project for the issue I am having. If I figure out more details, I will reopen with a proper repro.

[moberegger]

So the project I am seeing this happen in is definitely using version 0.4.0.

graphql-schema-linter --version
0.4.0

I tried making a smaller repo to show the issue, but can’t actually reproduce it. No idea what’s going on. Only differences that are obvious to me:

• The project it doesn’t work in has a config file with some rules disabled (nothing that looks like it would disable an “interfaces can extend other interfaces” rule, though)
• The project it doesn’t work in uses the lint-staged setup (it’s on the git commit I see the issue)
• The project it doesn’t work in has the schema spread over multiple files

I’m trying to make a repo with just a single .graphql file, but can’t reproduce. Unfortunately, I can’t share the project with the issue.

I’ll keep trying, but it looks like the problem is unique to us right now 😦