如何使用Java驱动程序在MongoDB中更新数组的嵌入式文档中的字段值

Question

I have the following structure in my document:

{
  "_id": ObjectId("5891a85bccaad513a844308f"),
  "sites": [
    {
      "site": "site1",
      "url": "site1.com",
      "status": 1,
    },
    {
      "site": "site2",
      "url": "site2.com",
      "status": 1,
    },
    {
      "site": "site3",
      "url": "site3.com",
      "status": 1,
    }
  ]
}

then I load all sites to UI. then I'll do some changes like following image and hit Update. I have deleted "site3". then My structure should update like as follow. site3 status should update to 0

{
  "_id": ObjectId("5891a85bccaad513a844308f"),
  "sites": [
    {
      "site": "site1",
      "url": "site1.com",
      "status": 1,
    },
    {
      "site": "site2",
      "url": "site2.com",
      "status": 1,
    },
    {
      "site": "site3",
      "url": "site3.com",
      "status": 0,
    }
  ]
}

How can I achieve this ?

Answer 1

You can make use of positional $ update.

The query filter finds the matching site in the array and update part will set the status to 0 to matching element.

collection.updateOne(new Document("_id", new ObjectId("5891a85bccaad513a844308f")).append("sites.site", "site3"), Updates.set("sites.$.status", 0));