Graphcool / GraphQL create mutation with relation

Question

I have the following GraphQL schema. It has Books and Authors with a many to many relationship. How do I create a new Book mutation for an existing Author?

schema

type Author implements Node {
  books: [Book!]! @relation(name: "BookAuthors")
  createdAt: DateTime!
  id: ID! @isUnique
  name: String!
  updatedAt: DateTime!
}

type Book implements Node {
  authors: [Author!]! @relation(name: "BookAuthors")
  createdAt: DateTime!
  id: ID! @isUnique
  title: String!
  updatedAt: DateTime!
}

mutation

mutation CreateBook($title: String!, $authors: [Author!]) {
    createBook(
      title: $title,
      authors: $authors,
    ) {
      id
      title
    }
  }

variables

{
  "title": "Ryans Book",
  "authors": ["cj5xti3kk0v080160yhwrbdw1"]
}

This is apparently called a connect mutation. Answer can be found here: https://www.graph.cool/docs/reference/simple-api/nested-connect-mutations-tu9ohwa1ui/ — Ryan King, Aug 04 '17 at 12:26
Note that this is specific to the Graphcool API :) Also, feel free to [answer your own question](https://stackoverflow.com/help/self-answer). — marktani, Aug 04 '17 at 21:53

score 9 · Accepted Answer · answered Aug 05 '17 at 01:25

9

This is apparently called a 'connect mutation'. https://www.graph.cool/docs/reference/simple-api/nested-connect-mutations-tu9ohwa1ui/

mutation CreateBook($title: String!, $authorIds: [ID!]) {
    createBook(
      title: $title,
      authorIds: $authorIds,
    ) {
      id
      title
    }
  }

answered Aug 05 '17 at 01:25

Ryan King

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1

Welp, that link is dead and the web archive doesn't have it archived. :\ – Amunak Jan 18 '21 at 17:49

Graphcool / GraphQL create mutation with relation

1 Answers1