Question

我正尝试使用LEN()=5更新嵌套数组中的某些值，如下所示：-

嵌套数组：-

id

现在我有这样的东西：-

let people = [
    {
        "_id": 1,
        "name": "Person 1",
        "pets": [
            {
                "_id": 1,
                "name": "Tom",
                "category": "cat",
                "favFood": [
                    {
                        "_id": 1,
                        "name": "steamed fish", // this will be updated
                        "gred": "A" // this will be updated
                    },
                    {
                        "_id": 2, 
                        "name": "fried fish",
                        "gred": "B"
                    }
                ]
            },
            {
                "_id": 2,
                "name": "Jerry",
                "category": "mouse",
                "favFood": [
                    {
                        "_id": 1,
                        "name": "cheese",
                        "gred": "C"
                    }
                ] 
            }
        ]
    }
]

但是，很不幸，我收到了People.updateOne( { "$set": { "pets.$[petID].favFood.$[favFoodID].name" : "bbq fish", "pets.$[petID].favFood.$[favFoodID].gred" : "A+" } }, { multi: true, arrayFilters: [ { "petID._id": 1 }, // pet with id of '1' { "favFoodID._id": 1 } // favFood with id of '1' ] }, (err, success) => { if(err) res.json({ message: `Unsuccessful!`, report: err }) else res.json({ message: `Successful!`, report: success }) } )的错误。而且我不知道不允许哪个"message": "\"_id\" is not allowed"或引起错误。

我想要进行的更改或更新如下：-

_id

任何人都可以指示我上面代码中导致错误的哪一部分？

已调整 let people = [ { "_id": 1, "name": "Person 1", "pets": [ { "_id": 1, "name": "Tom", "category": "cat", "favFood": [ { "_id": 1, "name": "bbq fish", // this value was updated "gred": "A+" // this value was updated }, { "_id": 2, "name": "fried fish", "gred": "B" } ] }, { "_id": 2, "name": "Jerry", "category": "mouse", "favFood": [ { "_id": 1, "name": "cheese", "gred": "C" } ] } ] } ]：-

updateOne

它可以返回People.updateOne( { "_id": 1, "pets._id": 1, "favFood._id": 1 }, { $set: { "pets.favFood.$$.name" : "bbq fish", "pets.favFood.$$.gred" : "A+", } }, (err, success) => { if(err) res.json({ message: `Unsuccessful!`, report: err }) else res.json({ message: `Successful!`, report: success }) } )。但是数据库中的值不变。从这里，如何调整我的代码？

Answer 1

这是答案：-

updateOne的工作代码：-

People.updateOne(
    {},
    { "$set": { "pets.$[petID].favFood.$[favFoodID].name" : "bbq fish", 
                "pets.$[petID].favFood.$[favFoodID].gred" : "A+" 
              } 
    },
    {
      arrayFilters: [ 
          { "petID._id": 1 },
          { "favFood._id": 1 }
        ]
    },
    (err, success) => {
        if(err) res.json({ message: `Unsuccessful!`, report: err })
        else res.json({ message: `Successful!`, report: success })
    }
)

更新嵌套数组MongoDB中的对象

1 个答案: