Error from the example of mutation provided in the documentation

[Kwadz]

Following the documentation, I wanted to use demo queries and mutations provided in
this repository.

After fixing the issue related in joaogarin/mydrupalgql#2, we still have an error while requesting a mutation:

Missing input mapper for argument data.

I think it would be nice having a working example that includes mutations (the examples provided in the graphql module contain queries only). What do you think?

[fubhy]

Can you upload your current code that is causing this error somewhere so I can have a look?

[Kwadz]

Sure, I uploaded a repo with the configuration exported in config/sync.

To sum up, I did:

1. Fresh install of Drupal 8
2. Add GraphQL v4 and mydrupalgql modules
3. Add a new server in /admin/config/graphql
4. Fix the visibility of methods in SdlSchemaMyDrupalGql (put public instead of protected)
5. Fix the issue ResolverRegistry::__construct() no longer accepts array
6. Add permissions to anonymous users to "Execute arbitrary requests"
7. Execute the following request like in the doc:

mutation {
  createArticle(data: {title: "Hello GraphQl 2"}) {
    ... on Article {
      id
      title
    }
  }
}

And get:

Missing input mapper for argument data.

[Kwadz]

@fubhy, have you been able to reproduce the issue?

[Kwadz]

Since the joaogarin/mydrupalgql repo seems not to be maintened anymore, I would suggest including the mutation part, when fixed, in the drupal-graphql/graphql/tree/8.x-4.x/examples repo and update the link in the documentation accordingly.