Mongo db 更新查询在 azure cosmos db 中的嵌入式文档中不起作用

Question

Embedded Update query works fine in mlab and atlas but not working in Cosmos DB:

My Collection structure:

{
    "_id" : ObjectId("5982f3f97729be2cce108785"),
    "password" : "$2y$10$F2P9ITmyKNebpoDaQ1ed4OxxMZSKmKFD9ipiU1klqio239c/nJcme",
    "nin" : "123",
    "login_status" : 1,
    "updated_at" : ISODate("2017-05-16T09:09:03.000Z"),
    "created_at" : ISODate("2017-05-16T06:08:47.000Z"),
    "files" : [ 
        {
            "name" : "abc",
            "updated_at" : ISODate("2017-05-16T06:08:48.000Z"),
            "created_at" : ISODate("2017-05-16T06:08:48.000Z"),
            "_id" : ObjectId("5982f3f97729be2cce108784")
        }
    ],
    "name" : "demo",
    "email" : "email@gmail.com",
    "phone" : "1231234",

}

My query is:

db.rail_zones.update(
  {'_id': ObjectId("5982f3f97729be2cce108785"),
   'files._id' : ObjectId("5982f3f97729be2cce108784")},
  { $set: {'files.$.name' : "Changed"}})

I get this response:

"acknowledged" : true,
"matchedCount" : 0.0,
"modifiedCount" : 0.0

Answer 1

According to your description, I tested this issue on my side and found the Array Update could not work as expected. I assumed that the Array Update feature has not been implemented in the MongoDB Compatibility layer of Azure CosmosDB. Moreover, I found a feedback Positional array update via '$' query support talking about the similar issue.