Subscriptions with arguments not working

Describe the bug I’m not able to receive any updates from subscriptions when using arguments in my application. I am able to reproduce the issue using the chat sample app while only using the AWS console so I’ll leave any other setup out here.

To Reproduce

• Create new AppSync App
• Pick Chat Sample
• Run Query

subscription {
  subscribeToNewMessage(conversationId: "myNewId") {
    content
    createdAt
  }
}

• Run Query

mutation CreateMessage {
  createMessage(content: "Second!" conversationId: "myNewId" createdAt: "This afternoon" id: "messageOneId") {
    content
    createdAt
  }
}

Expected behavior The subscription receives the results of the createMessage mutation.

Additional context If I remove the argument from the subscription it works as expected

type Subscription {
  subscribeToNewMessage: Message @aws_subscribe(mutations: ["createMessage"])
}

subscription {
  subscribeToNewMessage {
    content
    createdAt
  }
}

[Stereobit]

@attilah I’ve now figured out what the issue is. My assumption was that the subscriptions are filtered by the arguments I send in my mutation, not the ones I receive. If I add the field to my mutation it works:

mutation CreateMessage {
  createMessage(content: "Second!" conversationId: "myNewId" createdAt: "This afternoon" id: "messageOneId") {
    conversationId
    content
    createdAt
  }
}

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