Question

在我的应用程序中，我需要编辑文档...在编辑文档时，当前[未更改]版本应该仍可供其他用户使用。例如，当我开始编辑文档时，我在一个单独的集合中创建它的新副本，完成后我用新版本的临时集合替换当前版本。

我们假设存储在集合users中的原始文档如下所示：

{
  "_id" : ObjectId("53b986e2fe000000019a5a13"),
  "name" : "Joe",
  "birthDate" : "2080-12-11",
  "publications" : [
    { "title" : "title 1", "description" : "description 1" },
    { "title" : "title 2", "description" : "description 2" }
  ]
}

然后，让我们假设上面的文档被复制到另一个集合（例如users.wip）并进行如下修改：

{
  "_id" : ObjectId("53b986e2fe000000019a5a13"),
  "name" : "Joe",
  "birthDate" : "1980-12-11",
  "publications" : [
    { "title" : "bye bye", "description" : "Blah blah" },
    { "title" : "title 2", "description" : "description 2" },
    { "title" : "title 3", "description" : "description 3" }
  ]
}

如何更换whoe文件？问题是当我尝试用

更新原始文档时

{ "$set" : {
  "name" : "Joe",
  "birthDate" : "1980-12-11",
  "publications" : [
    { "title" : "bye bye", "description" : "Blah blah" },
    { "title" : "title 2", "description" : "description 2" },
    { "title" : "title 3", "description" : "description 3" }
  ]
}}

我总是收到以下错误消息：

10150  Field name duplication not allowed with modifiers

那说，更新整个文档的正确方法是什么？

Answer 1

要替换整个文档，您不能使用$set，只需向update电话提供新文档：

db.test.update({"_id": ObjectId("53b986e2fe000000019a5a13")}, {
  "_id" : ObjectId("53b986e2fe000000019a5a13"),
  "name" : "Joe",
  "birthDate" : "1980-12-11",
  "publications" : [
    { "title" : "bye bye", "description" : "Blah blah" },
    { "title" : "title 2", "description" : "description 2" },
    { "title" : "title 3", "description" : "description 3" }
  ]
})

但是，使用当前的3.0驱动程序，最好使用replaceOne代替：

db.test.replaceOne({"_id": ObjectId("53b986e2fe000000019a5a13")}, {
  "name" : "Joe",
  "birthDate" : "1980-12-11",
  "publications" : [
    { "title" : "bye bye", "description" : "Blah blah" },
    { "title" : "title 2", "description" : "description 2" },
    { "title" : "title 3", "description" : "description 3" }
  ]
})

MongoDB：如何更新集合中的整个文档

1 个答案: