错误：正文必须是字符串。使用 Type-graphql 和 apollo-server-express 时收到： resolvers: [[function HelloResolver]], vali

Posted 2023-03-08

【中文标题】错误：正文必须是字符串。使用 Type-graphql 和 apollo-server-express 时收到： resolvers: [[function HelloResolver]], validate: false

【英文标题】：Error: Body must be a string. Received: resolvers: [[function HelloResolver]], validate: false when using Type-graphql and apollo-server-express错误：正文必须是字符串。使用 Type-graphql 和 apollo-server-express 时收到： resolvers: [[function HelloResolver]], validate: false

【发布时间】：2021-09-13 17:11:24

【问题描述】：

我一直在关注这个full-stack tutorial by Ben Awad 当他向架构添加解析器时，一切都很顺利，但是当我尝试完全相同的代码时，我得到了上面的错误。我正在使用带有 apollo-server-express 版本 2.25.2 的 graphql 15.5.1 和 type-graphql 1.1.1。我的代码如下所示：

import Query, Resolver from "type-graphql";

@Resolver()
export class HelloResolver 
    @Query(() => Number)
    hello() 
        return 5;
    

import  ApolloServer  from "apollo-server-express";
import  buildSchema  from "graphql";
import HelloResolver from "./resolvers/hello";

const express = require('express');
const PORT : number = Number(process.env.PORT) || 3000;

const main = async () => 
    const apollo = new ApolloServer(
        schema: await buildSchema(
            // ERROR DUE TO LINE BELOW
            resolvers: [HelloResolver],
            validate: false,
        ),
    );

    apollo.applyMiddleware( app );

    app.listen(PORT, () => 
        console.log(`Listening on port $PORT...`);
    );


main().catch((e) => 
    console.error(e);
);

【参考方案1】：

import  buildSchema  from "graphql";

应该是

import  buildSchema  from "type-graphql";

你可以在the same code linked in the video description看到。