MongoDB 忽略 $push 命令而没有错误 | Python

Question

I have the document with array field and 1st value in it.

I want to update this document and add the value in array, so I get the document by find_one command and use this code:

mg[db][collection].update_one(document, {"$push": {array_field: value} })
mg.close()
print("end")

So, I can see the "end" print, but when I check mongo I realize that my array still has only 1 value and it wasn't update.

I tried to make the new array and update document with $set, but same problem break it up

No errors, what's wrong?

PS all other mongodb methods works fine with all documents except of this array-field

==========

Update:

I have db "chanlist" and collection "channels" with document:

{
                "name": "FilmNews",
                "chat_link": "filmnewsss",
                "chat_id": 1283929492,
                "repost_ids": [1395174524],
}

I need to add 1351487118 in "repost_ids" , so my steps are:

# db = chanlist db

x = db.channels.find_one({"name": "FilmNews"})

db.channels.update_one(x,  {"$push": {"repost_ids": 1351487118 } })

db.close()

print("check")

I did it all, seeing "check" print in my console, going to cloud.mongodb.com, updating page and my document still is:

{
                    "name": "FilmNews",
                    "chat_link": "filmnewsss",
                    "chat_id": 1283929492,
                    "repost_ids": [1395174524],
}

Its not updated...

Answer 1

I followed all your steps and the update_one worked just fine for my in both Python and the mongo shell. I include the shell example below:

> db.test.insert({name: "FilmNews",  "chat_link" : "filmnewsss",  "chat_id": 1283929492,  "repost_ids": [ 1395174524 ]})
WriteResult({ "nInserted" : 1 })
> db.test.findOne({name: "FilmNews"})
{
    "_id" : ObjectId("5edec43e290fc9eea2bb5e4a"),
    "name" : "FilmNews",
    "chat_link" : "filmnewsss",
    "chat_id" : 1283929492,
    "repost_ids" : [
        1395174524
    ]
}
> x=db.test.findOne({name: "FilmNews"})
{
    "_id" : ObjectId("5edec43e290fc9eea2bb5e4a"),
    "name" : "FilmNews",
    "chat_link" : "filmnewsss",
    "chat_id" : 1283929492,
    "repost_ids" : [
        1395174524
    ]
}
> db.test.updateOne(x,  {"$push": {array_field: 1 } })
{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }
> db.test.findOne({name: "FilmNews"})
{
    "_id" : ObjectId("5edec43e290fc9eea2bb5e4a"),
    "name" : "FilmNews",
    "chat_link" : "filmnewsss",
    "chat_id" : 1283929492,
    "repost_ids" : [
        1395174524
    ],
    "array_field" : [
        1
    ]
}
>

Here is the same code in the shell so it matches your example exactly:

> db.test.drop()
true
> db.test.insert({name: "FilmNews",  "chat_link" : "filmnewsss",  "chat_id": 1283929492,  "repost_ids": [ 1395174524 ]})
WriteResult({ "nInserted" : 1 })
> x = db.test.findOne({name: "FilmNews"})
{
    "_id" : ObjectId("5ef1c348bfa1a5850c9399aa"),
    "name" : "FilmNews",
    "chat_link" : "filmnewsss",
    "chat_id" : 1283929492,
    "repost_ids" : [
        1395174524
    ]
}
> db.test.updateOne(x,  {"$push": {array_field: 1 }})
{ "acknowledged" : true, "matchedCount" : 1, "modifiedCount" : 1 }
> db.test.findOne({name: "FilmNews"})
{
    "_id" : ObjectId("5ef1c348bfa1a5850c9399aa"),
    "name" : "FilmNews",
    "chat_link" : "filmnewsss",
    "chat_id" : 1283929492,
    "repost_ids" : [
        1395174524
    ],
    "array_field" : [
        1
    ]
}
>