Question

我知道the documentation of prisma-client中有一些与我的问题有关的部分：

但是，我不明白如何删除（JavaScript）pyramida-client中的所有相关记录。

例如，我的datamodel是这样的：

Add from library

如何如何删除包含所有相关任务组，任务和任务项的电路板？！

修改：

我最近尝试了这种解决方案，它也很好用。

type Board {
  id: ID! @unique
  createdAt: DateTime!
  updatedAt: DateTime!
  owner: User! @relation(name: "BoardOwnershipRelation")
  title: String!
  description: String
  taskGroups: [TaskGroup!]!
}

type TaskGroup {
  id: ID! @unique
  createdAt: DateTime!
  updatedAt: DateTime!
  owner: User! @relation(name: "TaskGroupOwnershipRelation")
  board: Board!
  title: String!
  description: String
  precedence: Int
  tasks: [Task!]!
}

type Task {
  id: ID! @unique
  createdAt: DateTime!
  updatedAt: DateTime!
  owner: User! @relation(name: "TaskOwnershipRelation")
  taskGroup: TaskGroup!
  title: String!
  description: String
  dueDate: DateTime
  precedence: Int
  items: [TaskItem!]!
  assignedTo: [User!]! @relation(name: "AssignmentRelation")
}

type TaskItem {
  id: ID! @unique
  createdAt: DateTime!
  updatedAt: DateTime!
  owner: User! @relation(name: "TaskItemOwnershipRelation")
  task: Task!
  title: String!
  description: String
  checked: Boolean!
  precedence: Int
}

但是，有没有更好的解决方案？

Answer 1

您可以使用@relation指令的“ onDelete”参数来指定删除实体（documentation）时发生的事情

您只需要像这样更改数据模型：

type Board {
  id: ID! @unique
  createdAt: DateTime!
  updatedAt: DateTime!
  owner: User! @relation(name: "BoardOwnershipRelation")
  title: String!
  description: String
  taskGroups: [TaskGroup!]! @relation(name: "BoardTaskGroups" onDelete: CASCADE)
}

type TaskGroup {
  id: ID! @unique
  createdAt: DateTime!
  updatedAt: DateTime!
  owner: User! @relation(name: "TaskGroupOwnershipRelation")
  board: Board! @relation(name: "BoardTaskGroups")
  title: String!
  description: String
  precedence: Int
  tasks: [Task!]! @relation(name: "TaskGroupsTask" onDelete: CASCADE)
}

type Task {
  id: ID! @unique
  createdAt: DateTime!
  updatedAt: DateTime!
  owner: User! @relation(name: "TaskOwnershipRelation")
  taskGroup: TaskGroup! @relation(name: "TaskGroupsTask")
  title: String!
  description: String
  dueDate: DateTime
  precedence: Int
  items: [TaskItem!]! @relation(name: "TaskTaskItem" onDelete: CASCADE)
  assignedTo: [User!]! @relation(name: "AssignmentRelation")
}

type TaskItem {
  id: ID! @unique
  createdAt: DateTime!
  updatedAt: DateTime!
  owner: User! @relation(name: "TaskItemOwnershipRelation")
  task: Task! @relation(name: "TaskTaskItem")
  title: String!
  description: String
  checked: Boolean!
  precedence: Int
}

然后删除您的董事会。所有其他删除操作将由Prisma完成

如何删除所有相关记录的记录

1 个答案: