使用 Prisma 获取连接字符串错误

问：

`schema.prisma file`

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "mongodb"
  url      = env("DATABASE_URL")
}

model User {
  id       String  @id @default(auto()) @map("_id") @db.ObjectId
  name     String?
  email    String  @unique
  password String
  posts    Post[]
}

model Post {
  id       String @id @default(auto()) @map("_id") @db.ObjectId
  slug     String
  title    String
  body     String
  author   User   @relation(fields: [authorId], references: [id])
  authorId String @db.ObjectId
}


`prisma/index.js`
const { PrismaClient } = require('@prisma/client/edge');
require('dotenv').config();

const prisma = new PrismaClient({
  datasources: {
    db: {
      url: process.env.DATABASE_URL,
    },
  },
});

module.exports = prisma;


`.env connection string :` 
DATABASE_URL= mongodb+srv://username:[email protected]/?retryWrites=true&w=majority

我在使用 postman singup 时出错：Error： PrismaClientKnownRequestError： 无效调用：prisma.user.create()

验证数据源时出错：URL 必须以 exports.signup （D：\prisma_backend\controllers\userControllers.js：20：11） 中的协议开头 在 process.processTicksAndRejections （node：internal/process/task_queues：95：5）dbprisma://

please anyone tell me how to rectify this error