Question

我认为我只是在错误地使用此模块，这就是我收到错误的原因。根据文档，我可以将解析器和模式数组从mergeSchemas传递到graphql-tools函数。但我收到此错误：

Error: Apollo Server requires either an existing schema, modules or typeDefs

代码如下：

app.js

import { ApolloServer } from 'apollo-server'
import schema from './modules'

const server = new ApolloServer({
    schema
})

server.listen().then(({ url }) => {
    console.log(` Server ready at ${url}`)
})

合并模式

import { mergeSchemas } from 'graphql-tools'

import bookSchema from './book/schema/book.gql'
import bookResolver from './book/resolvers/book'

export const schema = mergeSchemas({
    schemas: [bookSchema],
    resolvers: [bookResolver] // ==> Maybe I have to merge these before hand?
})

架构

type Query {
    book(id: String!): Book
    bookList: [Book]
}

type Book {
    id: String
    name: String
    genre: String
}

解析器

export default {
    Query: {
        book: (parent, args, context, info) => {
            console.log(parent, args, context, info)
            return {
                id: `1`,
                name: `name`,
                genre: `scary`
            }
        },
        bookList: (parent, args, context, info) => {
            console.log(parent, args, context, info)
            return [
                { id: `1`, name: `name`, genre: `scary` },
                { id: `2`, name: `name`, genre: `scary` }
            ]
        }
    }
}

Answer 1

严重错误：

需要从解构结构中导入模式对象：

MODE_PREEMPTIVE

ApolloServer使用mergeSchemas，错误：Apollo Server需要现有的架构，模块或typeDefs

1 个答案: