Graphcool/GraphQL創建關係的變異

Question

我有以下的GraphQL架構。它有Books和Authors與多對多的關係。如何爲現有作者創建新的書籍變體？

---

模式

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! 
} 

突變

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

變量

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

Answer 1

顯然這是被稱爲 '連接突變'。 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 
    } 
    }