updateMany 找不到参数

Posted 2023-03-30

【中文标题】updateMany 找不到参数

【英文标题】：updateMany can't find argument

【发布时间】：2021-11-19 04:42:29

【问题描述】：

我有一个问题：

  createNotification: async (_, args, req, res) => 
    const followedBy = await prisma.user.updateMany(
      where: 
        following: 
          some: 
            id: req.userId
          ,
        ,
      ,
      data: 
        notifications: 
          create: 
            message: args.message,
            watched: false,
          ,
        ,
      ,
    )

以及用户和通知模型：

model User 
  id                Int     @id @default(autoincrement())
  email             String  @unique
  name              String
  user_name         String  @unique
  password          String
  movies            Movie[]
  notifications     Notification[]
  followedBy        User[]  @relation("UserFollows", references: [id])
  following         User[]  @relation("UserFollows", references: [id])


model Notification 
  id                Int     @id @default(autoincrement())
  link              String?
  movie_id          Int?
  message           String
  icon              String?
  thumbnail         String?
  user              User    @relation(fields: [userId], references: [id])
  userId            Int
  watched           Boolean

运行查询时出现错误：

Unknown arg `notifications` in data.notifications for type UserUpdateManyMutationInput. Did you mean `email`? Available args:
type UserUpdateManyMutationInput 
  email?: String | StringFieldUpdateOperationsInput
  name?: String | StringFieldUpdateOperationsInput
  user_name?: String | StringFieldUpdateOperationsInput
  password?: String | StringFieldUpdateOperationsInput

奇怪的是这行得通：

    const followedBy = await prisma.user.findUnique(
      where: id: req.userId,
      include: 
        followedBy: true,
      ,
    );

    followedBy.followedBy.map(async(user) => 
      await prisma.user.update(
        where: id: user.id,
        data: 
          notifications: 
            create: 
              message: args.message,
              watched: false,
            ,
          ,
        ,
      );
    );

但这并没有充分利用 Prisma 提供的功能。

【参考方案1】：

截至 2021 年 9 月，Prisma 不支持在*** updateMany 查询中更改嵌套关系。这就是打字稿错误试图告诉您的内容，您只能访问data 中的email、name、user_name 和password 字段。有一个开放的feature request for this，如果您有兴趣，可以关注它。

对于您提供的架构，这里有一个可能的解决方法，它的可读性略低，但比您当前的解决方案更优化。

createNotification: async (_, args, req, res) => 
    // get the followers array of req.userId
    const followedBy = await prisma.user.findUnique(
        where:  id: req.userId ,
        include: 
            followedBy: true,
        ,
    );

    // array of notification objects to be created, one for each follower of req.userId
    let messageDataArray = followedBy.followedBy.map((user) => 
        return 
            userId: user.id,
            message: args.message,
            watched: false,
        ;
    );

    // do a bulk createMany.
    // Since it's one query, it should be more optimized than running an update for each user in a loop.
    await prisma.notification.createMany(
        data: messageDataArray,
    );
;

如果您有兴趣，请here's the docs reference 了解可能的嵌套更新类型。