罗孚正在谱写意想不到的超图

Question

我正在关注 docs 尝试启动 apollo 网关和运行。我正在使用漫游者通过以下命令组成我的子图：rover supergraph compose --config ./supergraph-config.yaml > supergraph.graphql

该命令有效，但是当我尝试启动我的网关时，出现此错误：GraphQLError: Syntax Error: Unexpected character: U+FFFD. supergraph compose 命令似乎出于某种原因添加了一些无效的字符。当我将文件打印为字符串时，我在文件顶部看到这两个字符：��.

示例：

��
schema
  @link(url: "https://specs.apollo.dev/link/v1.0")
  @link(url: "https://specs.apollo.dev/join/v0.2", for: EXECUTION)
{
  query: Query
}
...

我也没有发现任何关于堆栈溢出或 github 的问题，所以我不太确定是什么问题。

网关：

const { ApolloServer, gql } = require('apollo-server');
const { ApolloGateway } = require('@apollo/gateway');
const { readFileSync } = require('fs');
const path = require("path");

const schemaString = readFileSync("../supergraph.graphql").toString()
const supergraphSdl = gql` ${schemaString} `;

// Initialize an ApolloGateway instance and pass it
// the supergraph schema
const gateway = new ApolloGateway({
  supergraphSdl,
});

// Pass the ApolloGateway to the ApolloServer constructor
const server = new ApolloServer({
  gateway,
});

server.listen().then(() => {
  console.log(` Gateway ready `);
});

子图：

const { ApolloServer, gql } = require('apollo-server');
const { buildSubgraphSchema } = require('@apollo/subgraph');

interface User {
    id: string
    username: string
}

const typeDefs = gql`
  extend schema
    @link(url: "https://specs.apollo.dev/federation/v2.0",
          import: ["@key", "@shareable"])

  type Query {
    me: User
  }

  type User @key(fields: "id") {
    id: ID!
    username: String
  }
`;

const resolvers = {
  Query: {
    me() {
      return { id: "1", username: "@ava" }
    }
  },
  User: {
    __resolveReference(user: User, { fetchUserById }: any){
      return fetchUserById(user.id)
    }
  }
}

const server = new ApolloServer({
  schema: buildSubgraphSchema({ typeDefs, resolvers })
});

server.listen(3000).then(({ url }) => {
    console.log(` Server ready at ${url}`);
});

Answer 1

rover 生成的文件是用 utf16le 编码的，问题是我正在用 utf8 读取文件。

读取 'utf16le' 编码格式的文件有效。

const schemaString = await readFileSync('../supergraph.graphql', 'utf16le');

罗孚正在谱写意想不到的超图

Rover is composing supergraph with unexpected character

apollo

apollo-federation