javascript - Apollo makeExecutableSchema 抛出错误 "Cannot read property ' 种“未定义”

Question

我正在尝试使用 apollo 进行模式拼接，但每次使用 makeExecutableSchema 时都会出现错误。错误如下:

../node_modules/graphql-tools/dist/generate/concatenateTypeDefs.js:9:

-> if (typeDef.kind !== undefined)

TypeError: Cannot read property 'kind' of undefined

即使只是复制 Apollo 上的基本示例 website，我也重现了该问题。

const { ApolloServer, gql, makeExecutableSchema } = require("apollo-server");
const { addMockFunctionsToSchema, mergeSchemas } = require("graphql-tools");

const chirpSchema = makeExecutableSchema({
  typeDefs: `
      type Chirp {
        id: ID!
        text: String
        authorId: ID!
      }

      type Query {
        chirpById(id: ID!): Chirp
        chirpsByAuthorId(authorId: ID!): [Chirp]
      }
    `
});

addMockFunctionsToSchema({ schema: chirpSchema });

const authorSchema = makeExecutableSchema({
  typeDefs: `
      type User {
        id: ID!
        email: String
      }

      type Query {
        userById(id: ID!): User
      }
    `
});

addMockFunctionsToSchema({ schema: authorSchema });

const schema = mergeSchemas({
  schemas: [chirpSchema, authorSchema]
});

const server = new ApolloServer(schema);

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

我做错了什么？但是我尝试使用 makeExecutableSchema 时总是遇到相同的错误。

Answer 1

据我所知，您正在使用 [email protected] 在这个版本中 ApolloServer构造函数接收一个选项参数

constructor(options)

您应该传递new ApolloServer({ schema: schema })而不是new ApolloServer(schema)

我尝试了你给出的例子，它成功了:)