Nexus 和 GraphQL：“上下文”类型的根输入路径不存在

Posted 2023-03-08

【中文标题】Nexus 和 GraphQL：“上下文”类型的根输入路径不存在

【英文标题】：Nexus & GraphQL: Root typing path for the type "context" does not exist

【发布时间】：2021-10-09 23:08:37

【问题描述】：

我正在尝试在 Next.js API 路由中运行 graphql。

我正在使用 nexus 来编写 graphql 架构。这是context.ts和schema.ts这两个文件，用于设置nexus开发模式。

// context.ts
import  database  from "../loaders/database";
import  PrismaClient  from "@prisma/client";

export interface Context 
  database: PrismaClient;


export const context: Context = 
  database,
;

// schema.ts
import  makeSchema  from "nexus";
import  nexusPrisma  from "nexus-plugin-prisma";
import  join  from "path";

import * as types from "./types";

export const schema = makeSchema(
  types,
  plugins: [
    nexusPrisma(
      prismaClient: (ctx) => ctx.database,
      experimentalCRUD: true,
    ),
  ],
  outputs: 
    schema: join(__dirname, "generated", "schema.graphql"),
    typegen: join(__dirname, "generated", "nexus-typegen.ts"),
  ,
  contextType: 
    module: join(__dirname, "context.ts"),
    export: "Context",
  
);

我在网上搜索，发现的壁橱是here，他们使用sourceTypes 来解决问题。我试过了，但错误并没有消失。

我使用以下脚本为 graphql 生成 schema 和 types。

  "scripts": 
      "generate:nexus": "ts-node --transpile-only -P nexus.tsconfig.json src/server/graphql/schema.ts",
  

虽然代码编译成功，但出现以下错误。

event - build page: /api/graphql
event - compiled successfully
Error: Root typing path "/mnt/B49635D3963596B8/Web/Web/react/next/nextjs-starter/.next/server/pages/api/context.ts" for the type "context" does not exist
    at Object.resolveImportPath (/mnt/B49635D3963596B8/Web/Web/react/next/nextjs-starter/node_modules/nexus/dist/utils.js:411:15)
    at TypegenPrinter.printDynamicImport (/mnt/B49635D3963596B8/Web/Web/react/next/nextjs-starter/node_modules/nexus/dist/typegenPrinter.js:132:40)
    at TypegenPrinter.printHeaders (/mnt/B49635D3963596B8/Web/Web/react/next/nextjs-starter/node_modules/nexus/dist/typegenPrinter.js:80:18)
    at TypegenPrinter.print (/mnt/B49635D3963596B8/Web/Web/react/next/nextjs-starter/node_modules/nexus/dist/typegenPrinter.js:69:22)
    at TypegenMetadata.<anonymous> (/mnt/B49635D3963596B8/Web/Web/react/next/nextjs-starter/node_modules/nexus/dist/typegenMetadata.js:109:128)
    at Generator.next (<anonymous>)
    at fulfilled (/mnt/B49635D3963596B8/Web/Web/react/next/nextjs-starter/node_modules/tslib/tslib.js:114:62)

谁能帮我看看我哪里做错了？

谢谢！

【参考方案1】：

经过一番调试，终于找到了解决办法。

首先，nexus 文档有一部分供next.js 用户使用，这是所有人必读的。 link.

我必须将__dirname 替换为process.cwd()。问题终于解决了。

// schema.ts

import  makeSchema  from "nexus";
import  nexusPrisma  from "nexus-plugin-prisma";
import  join  from "path";

import * as types from "./types";

export const schema = makeSchema(
  types,
  plugins: [
    nexusPrisma(
      prismaClient: (ctx) => ctx.database,
      experimentalCRUD: true,
    ),
  ],
  outputs: 
    schema: join(process.cwd(), "src/server/graphql/generated/schema.graphql"),
    typegen: join(process.cwd(), "src/server/graphql/generated/nexus-typegen.ts"),
  ,
  contextType: 
    module: join(process.cwd(), "src/server/graphql/context.ts"),
    export: "Context",
  ,
);