lambda - AWS Lambda 上的 ApolloGraphQL 联合网关无法读取未定义的属性“查询”

Question

我正在尝试使用无服务器 lambda 设置测试联合 GraphQL 实例。现在，我将产品子图部署在一个 lambda 上，网关部署在另一个 lambda 上。对产品 lambda 的查询工作正常；但是，对网关进行相同的查询会返回以下错误。如果我部署一个本地网关，我可以对产品子图进行查询——它仅不能通过部署在 Lambda 中的网关工作。虽然我在网上看到有人说他们已经在 AWS lambda 中成功实现了 GraphQL 联合网关，但我一直无法找到有效的代码库或遇到同样问题的任何人。任何见解将不胜感激，谢谢！

错误状态：400

{
    "errors": [
        {
            "message": "Cannot read property 'QUERY' of undefined",
            "extensions": {
                "code": "INTERNAL_SERVER_ERROR",
                "exception": {
                    "stacktrace": [
                        "TypeError: Cannot read property 'QUERY' of undefined",
                        "    at QueryPlanningContext.getVariableUsages (/var/task/node_modules/@apollo/query-planner/dist/QueryPlanningContext.js:46:115)",
                        "    at executionNodeForGroup (/var/task/node_modules/@apollo/query-planner/dist/buildQueryPlan.js:162:36)",
                        "    at /var/task/node_modules/@apollo/query-planner/dist/buildQueryPlan.js:58:39",
                        "    at Array.map (<anonymous>)",
                        "    at buildQueryPlan (/var/task/node_modules/@apollo/query-planner/dist/buildQueryPlan.js:58:26)",
                        "    at QueryPlanner.buildQueryPlan (/var/task/node_modules/@apollo/query-planner/dist/index.js:28:52)",
                        "    at /var/task/node_modules/@apollo/gateway/dist/index.js:95:58",
                        "    at NoopContextManager.with (/var/task/node_modules/@opentelemetry/api/build/src/context/NoopContextManager.js:36:24)",
                        "    at ContextAPI.with (/var/task/node_modules/@opentelemetry/api/build/src/api/context.js:71:54)",
                        "    at NoopTracer.startActiveSpan (/var/task/node_modules/@opentelemetry/api/build/src/trace/NoopTracer.js:67:28)"
                    ]
                }
            }
        }
    ]
}

下面的代码是子图 lambda

产品.js

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


const products = [
    {
        upc: 'a1',
        name: 'latte',
        price: 3
    },
    {
        upc: 'a2',
        name: 'macchiato',
        price: 4
    },
    {
        upc: 'a3',
        name: 'mocha',
        price: 5
    }
];


const typeDefs = gql`
    type Product @key(fields: "upc"){
        upc: String!
        name: String!
        price: Int
    }

    type Query {
       product(upc: String!): Product
    }
`;

const resolvers = {
    Query: {
        product(parent, args, context, info){
            return products.find(product => product.upc === args.upc)
        }
    },
    Product: {
        __resolveReference(reference){
            return products.find(product => product.upc === reference.upc)
        }
    }
};

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


exports.productsHandler = server.createHandler();

无服务器.yml

service: graphqlproducts

provider:
  name: aws
  runtime: nodejs14.x

functions:
  products:
      handler: products.productsHandler
      events:
      - http:
          path: /
          method: post
          cors: true
      - http:
          path: /
          method: get
          cors: true

包.json

{
    "name": "graphql-poc",
    "description": "GraphQL POC",
    "version": "0.0.1",
    "private": true,
    "dependencies": {
        "@apollo/federation": "^0.35.1",
        "@apollo/subgraph": "^0.2.0",
        "apollo-server": "^3.6.3",
        "apollo-server-lambda": "^3.6.2",
        "graphql": "^16.3.0"
    },
    "devDependencies": {},
    "scripts": {}
}

下面是网关 lambda 的代码

index.js

const { ApolloServer } = require('apollo-server-lambda');
const { ApolloGateway, IntrospectAndCompose } = require('@apollo/gateway');

const gateway = new ApolloGateway({
  supergraphSdl: new IntrospectAndCompose({
    subgraphs: [
      { name: 'products', url: 'redacted' }
    ],
  }),
});

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

exports.gatewayHandler = server.createHandler();

无服务器.yml

service: graphqlgateway

provider:
  name: aws
  runtime: nodejs14.x

functions:
  gateway:
      handler: index.gatewayHandler
      timeout: 20
      events:
      - http:
          path: /
          method: post
          cors: true
      - http:
          path: /
          method: get
          cors: true

包.json

{
  "name": "graphqlpocgateway",
  "version": "0.0.1",
  "description": "Gateway for graphqlpoc",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@apollo/gateway": "^0.47.0",
    "apollo-server": "^3.6.2",
    "apollo-server-lambda": "^3.6.3",
    "graphql": "^15.8.0"
  },
  "devDependencies": {
    "@apollo/rover": "^0.4.1"
  }
}