我无法在 typeDefs 中导入 schema.graphql 文件：找不到以下指针的任何 GraphQL 类型定义：

Posted 2023-03-08

【中文标题】我无法在 typeDefs 中导入 schema.graphql 文件：找不到以下指针的任何 GraphQL 类型定义：

【英文标题】：I'm unable to import schema.graphql file in typeDefs : Unable to find any GraphQL type definitions for the following pointers:

【发布时间】：2020-11-05 00:33:10

【问题描述】：

我正在使用 apollo-server-express 通过 GraphQL 创建后端 api

现在，我想在单独的文件中编写 GraphQL Schema。例如“schema.graphql”，所以当我把之前在模板字符串中写的代码放在一起的时候。进入“schema.graphql”我的应用程序因以下错误而崩溃：

找不到以下指针的任何 GraphQL 类型定义

这是我的代码：

server.js

const express = require('express');
const  ApolloServer, gql  = require('apollo-server-express');
const  importSchema  = require('graphql-import');
const fs = require('fs');
const path = '/graphql';


const apolloServer = new ApolloServer(
  typeDefs: importSchema('./greet.graphql'),
  resolvers: require('./graphql/resolver'),
);

const app = express();
apolloServer.applyMiddleware( app, path );

app.listen(8080, () => 
  console.log('Server Hosted');
); 

greet.graphql

type Query 
  greeting: String

resolver.js

const Query = 
  greeting: () => 'Hello World From NightDevs',
;

module.exports =  Query ;

不仅如此，我也尝试过这个解决方案 - *** Solution

但这根本不起作用

【参考方案1】：

对我来说很好用。包版本：

"apollo-server-express": "^2.12.0",
"graphql-import": "^0.7.1",

例子：

server.js:

const express = require('express');
const  ApolloServer  = require('apollo-server-express');
const  importSchema  = require('graphql-import');
const path = require('path');

const apolloServer = new ApolloServer(
  typeDefs: importSchema(path.resolve(__dirname, './greet.graphql')),
  resolvers: require('./resolver')
);

const app = express();
const graphqlEndpoint = '/graphql';
apolloServer.applyMiddleware( app, path: graphqlEndpoint );

app.listen(8080, () => 
  console.log('Server Hosted');
);

greet.graphql:

type Query 
  greeting: String

resolver.js:

const Query = 
  greeting: () => 'Hello World From NightDevs',
;

module.exports =  Query ;

通过curl进行测试：

curl 'http://localhost:8080/graphql' -H 'Accept-Encoding: gzip, deflate, br' -H 'Content-Type: application/json' -H 'Accept: application/json' -H 'Connection: keep-alive' -H 'DNT: 1' -H 'Origin: http://localhost:8080' --data-binary '"query":"query \n  greeting\n"' --compressed

得到结果：

"data":"greeting":"Hello World From NightDevs"