如何更新prisma中的嵌套数据？

Question

在进一步深入研究之前，以下是我正在使用的技术的简要概述：

• Next.Js（应用路由器）版本14.2.2
• 反应版本18
• 棱镜版本5.12.1
• 数据库-> mongodb

我是 prisma 的新手，当我尝试在 Prisma 中更新嵌套数据时，它总是在 catch 块中返回错误，并显示如下错误消息：

TypeError: Cannot read properties of undefined (reading 'map') at PATCH ...

我很确定这个补丁部分有错误，但我不知道它在哪里，这是代码：

export const PATCH = async (
  req: NextRequest,
  { params }: { params: { id: string } }
) => {
  try {
    const { id } = params
    const body: ProductPostProps = await req.json()
    const { title, price, description, stock, categories, images } = body

    const updateProduct = await prisma.product.update({
      where: {
        id,
      },
      data: {
        title,
        price,
        description,
        stock,
        categories: {
          create: categories.map(({ title }) => ({
            title,
          })),
        },
        images: {
          create: images.map(({ image }) => ({
            image,
          })),
        },
      },
      include: {
        images: true,
        categories: true,
      },
    })

    if (!updateProduct) {
      return NextResponse.json({
        message: "data not found",
        status: 404,
      })
    }

    return NextResponse.json({
      message: "product updated",
    })
  } catch (error) {
    //error appear in this section
    console.log(error)
    return NextResponse.json({
      message: "internal server error",
      error,
      status: 500,
    })
  }
}

当我使用 POST 方法发布嵌套数据时，它工作得很好。这是一个例子：

export const POST = async (req: NextRequest) => {
  try {
    const body: ProductPostProps = await req.json()
    const { title, price, description, stock, categories, images } = body

    await prisma.product.create({
      data: {
        title,
        price,
        description,
        stock,
        categories: {
          create: categories.map(({ title }) => ({
            title,
          })),
        },
        images: {
          create: images.map(({ image }) => ({
            image,
          })),
        },
      },
      include: {
        images: true,
        categories: true,
      },
    })

    return NextResponse.json({
      message: "product successfully created",
      status: 201,
    })
  } catch (error) {
    console.log(error)
    return NextResponse.json({
      message: "internal server error",
      error: error,
      status: 500,
    })
  }
}

这是成功发布后数据的示例：

{
      "id": "662672ede82c9e68a76f9b06",
      "title": "Nike Dunk Low Retro SE",
      "price": 1900000,
      "description": "The '80s b-ball icon returns with a classic construction and throwback hoops flair. Channelling vintage style back onto the streets, its padded, low-cut collar lets you take your game anywhere—in comfort.",
      "stock": 10,
      "createdAt": "2024-04-22T14:23:41.713Z",
      "updatedAt": "2024-04-22T14:23:41.713Z",
      "images": [
        {
          "id": "662672ede82c9e68a76f9b0a",
          "image": "https://static.nike.com/a/images/t_PDP_1728_v1/f_auto,q_auto:eco/6464f9e4-59af-4179-9c7f-e81d334db2aa/dunk-low-retro-se-shoes-tsMmHC.png",
          "productId": "662672ede82c9e68a76f9b06"
        },
        {
          "id": "662672ede82c9e68a76f9b0b",
          "image": "https://static.nike.com/a/images/t_PDP_1728_v1/f_auto,q_auto:eco/49f166a8-7ea5-4b64-b4a3-05fb4d420281/dunk-low-retro-se-shoes-tsMmHC.png",
          "productId": "662672ede82c9e68a76f9b06"
        },
      ],
      "categories": [
        {
          "id": "662672ede82c9e68a76f9b07",
          "title": "men's shoes",
          "productId": "662672ede82c9e68a76f9b06"
        },
        {
          "id": "662672ede82c9e68a76f9b09",
          "title": "nike",
          "productId": "662672ede82c9e68a76f9b06"
        }
      ],
    },

这是我的 Prisma 数据模型：

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

datasource db {
  provider = "mongodb"
  url      = env("DATABASE_URL")
}
 
model Product {
  id          String         @id @default(auto()) @map("_id") @db.ObjectId
  title       String
  price       Int
  images      ImageProduct[]
  description String?
  stock       Int?
  categories  Category[]

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@map("products")
}

model ImageProduct {
  id        String  @id @default(auto()) @map("_id") @db.ObjectId
  image     String?
  product   Product @relation(fields: [productId], references: [id], onDelete: Cascade)
  productId String

  @@map("image_products")
}

model Category {
  id        String  @id @default(auto()) @map("_id") @db.ObjectId
  title     String
  product   Product @relation(fields: [productId], references: [id], onDelete: Cascade)
  productId String

  @@map("categories")
}

Answer 1

这不是 Prisma 错误，而是传入数据的错误。

就像错误消息所说，

categories

或

images

是

undefined

，这就是为什么当您尝试映射它时会抛出异常。

我会记录请求正文的值，并尝试找出客户端未在其 PATCH 请求中发送预期数据的原因。