How to pass the values of a connection to a subscription? - graphql

Question

I'm trying to return a subscription which consists of the following:
const postsSubscription = gql`
subscription postAdded {
postAdded {
id
title
description
author{
name
}
}
}
`
What happens is that Author is type of User, and I just pass an authorId. That means that I don't have the author name when I create the Post:
createPost: async (root, req, { posts }) => {
const Item = {
id: uuid.v4(),
authorId: '565dbdc0-36f2-4bba-be67-c126d0c71fff',
...req
}
await posts.create({ Item })
pubsub.publish('postAdded', { postAdded: Item })
return Item
},
Here is the Author resolver:
Post: {
author: async({ authorId }, req, { users }) => {
const Key = { id: authorId }
const { Item } = await users.get({ Key })
return Item
}
}
Here is the schema:
type Post {
id: ID
title: String
description: String
author: User #relation(name: "PostAuthor")
}
type User {
id: ID
name: String
email: String
password: String
posts: [Post] #relation(name: "UserPosts")
}
type PostPayload {
post: Post
}
type CreateUserPayload {
user: User
}
type Query {
allPosts: [Post]
allUsers: [User]
post(id: ID!): Post
user(id: ID!): User
}
type Mutation {
createPost(input: CreatePostInput!): PostPayload
updatePost(input : UpdatePostInput!): PostPayload
createUser(input : CreateUserInput!): CreateUserPayload
}
type Subscription {
postAdded: Post
}
input CreatePostInput {
title: String!
description: String!
}
input UpdatePostInput {
id: ID!
title: String!,
description: String!
}
input CreateUserInput {
name: String!
email: String!
password: String!
}
schema {
query: Query
mutation: Mutation
subscription: Subscription
}
So, my question is, how to pass all required fields (including the connections) to the subscription?

Answer 1

I made it work, but not as I wanted.
1) I had to remove this part of the code:
Post: {
author: async({ authorId }, req, { users }) => {
const Key = { id: authorId }
const { Item } = await users.get({ Key })
return Item
}
}
and added this function to the createPost function itself:
createPost: async (root, { input }, { posts, users }) => {
const Key = { id: '3b1884b8-9ee7-4d9d-ab2f-ff32bcd69b9a' }
const user = await users.get({ Key })
const Item = {
id: uuid.v4(),
author: user.Item,
...input
}
await posts.create({ Item })
await pubsub.publish(POST_ADDED_TOPIC, { [POST_ADDED_TOPIC]: Item })
return { post: Item }
}
So this is kinda fixed. But, if you know how to fix this, using the first approach (Post: author thingy) I'll appreciate.