Subscription result always null - what's the right format to yield?

[tigerinus]

This is more of a question than bug

• Explain with a simple sentence the expected behavior

Followed the doc, created a simple project that yields new data upon subscription. However at subscriber side (in GraphiQL) data is always

{
  "newLink": null
}

See my project at https://github.com/tigerinus/py-tartiflette-graphql-demo

Question: What's missing that causes this?

• Tartiflette version:

1.4.1

• Python version:

3.10.4

• Executed in docker:

No

• GraphQL Schema & Query:

Schema:

  type Query {
    info: String!
    feed: [Link!]!
  }

  type Mutation {
    postLink(url: String!, description: String!): Link!
  }

  type Subscription {
    newLink: Link
  }

  type Link {
    id: ID!
    description: String!
    url: String!
  }

Query:

query feed {
  feed {
    id
    description
    url
  }
}

mutation postLink {
  postLink(url:"asdf", description:"asdf") {
    id
  }
}

subscription newLink {
  newLink {
    id
    description
    url
  }
}

• Is it a regression from a previous versions?

Not sure

• Stack trace

[petertriho]

Try

link = await await queue.get()
yield { "newLink": link }