如何在 GraphQL Pothos Builder 中创建自定义突变输出

Question

我在 GraphQL Pothos Builder 中创建了一个登录组件。我使用 Prisma 作为我的 ORM。我想知道如何发送自定义输出作为响应。目前我只能发送用户类型的响应。我尝试创建 UserAndToken ObjectRef 但它似乎不起作用。你能帮我解决这个错误吗？过去一周我一直在努力，但我一直坚持这一点。预先感谢。

import prisma from "@/prisma/client";
import { User as UserModel } from "@prisma/client";
import bcrypt from "bcrypt";
import { GraphQLError } from "graphql";
import ms from "ms";
import { cookies } from "next/headers";
import { builder } from "../builder";
import { User } from "../types/User";
import {
  generateAccessToken,
  generateRefreshToken,
} from "../utils/generateToken";

const UserAndToken = builder
  .objectRef<{ user: UserModel, accessToken: string }>("UserAndToken")
  .implement({
    fields: t => ({
      user: t.field({ type: User, resolve: (parent) => parent.user })
    })
  })

builder.mutationFields((t) => ({
  login: t.prismaField({
    description: "Login to time boxing platform.",
    type: UserAndToken,
    args: {
      email: t.arg({ type: "Email", required: true }),
      password: t.arg.string({ required: true }),
    },
    resolve: async (query, _, args) => {
      const user = await prisma.user.findUnique({
        where: { email: args.email },
      });

      if (
        !user ||
        !bcrypt.compare(args.password, user.password)
      ) {
        return Promise.reject(
          new GraphQLError(
            "Either email or password is incorrect."
          )
        );
      }

      try {
        const accessToken = generateAccessToken(user);
        const refreshToken = generateRefreshToken(user);

        cookies().set({
          name: "X-REFRESH-TOKEN",
          value: refreshToken,
          httpOnly: true,
          sameSite: process.env.NODE_ENV === "production" ? "none" : "lax",
          secure: process.env.NODE_ENV === "production",
          expires: new Date(Date.now() + ms("7d")), //7d
        });

        await prisma.session.create({
          data: {
            refreshToken,
            expiresAt: new Date(new Date().getDate() + 7),
            userId: user.id,
          },
        });

        // update user's last login.
        await prisma.user.update({
          where: { id: user.id },
          data: { lastLogin: new Date() },
        });

        return { user, accessToken };
      } catch (err) {
        console.log(err)
        return Promise.reject(
          new GraphQLError(
            "Unable to login. Try again later."
          )
        );
      }
    },
  }),
}));

我尝试根据本文创建一个 ObjectRef，但它对我不起作用。这是该文章的链接 - https://github.com/hayes/pothos/discussions/1032

const UserAndToken = builder
  .objectRef<{ user: UserModel, accessToken: string }>("UserAndToken")
  .implement({
    fields: t => ({
      user: t.field({ type: User, resolve: (parent) => parent.user })
    })
})

Answer 1

1. 您需要将

   t.prismaField

   更改为

   t.field

   才能自定义响应选项。

2. 安装 SimpleObjectsPlugin。

   npm i @pothos/plugin-simple-objects

3. 将该插件添加到 SchemaBuilder。

     plugins: [PrismaPlugin, SimpleObjectsPlugin],
     prisma: {
       client: prisma,
     },
   });```
   
   

4. 在构建器对象中添加来自 Prisma Client 的用户对象。

     PrismaTypes: PrismaTypes;
     Scalars: {
       DateTime: {
         Input: DateTime;
         Output: DateTime;
       };
       Email: {
         Input: string;
         Output: string;
       };
     };
     Objects: {
       User: User
     }
   };```
   
   

5. 创建一个LoginResponse SimpleObject并将类型更改为LoginResponse

     fields: (t) => ({
       user: t.field({ type: "User" }),
       accessToken: t.string({})
     })
   })```