Question

我数据库中的一条记录：

{
"_id": {
    "$oid": "5b93d84aa9123300043c4f8f"
},
"googleId": "110329027039267241635",
"username": "Carl Junior",
"eoUsers": [
    {
        "username": "1@gmail.com",
        "password": "3",
        "loggedIn": false
    },
    {
        "username": "1@gmail.com",
        "password": "3",
        "loggedIn": false
    },
    {
        "username": "1@gmail.com",
        "password": "3",
        "loggedIn": false
    },
    {
        "username": "1@gmail.com",
        "password": "3",
        "loggedIn": false,
        earnings: [['1/20', 0.2], ['1/21', 0.1],  // I want to insert item here
    },
     ]]
],
"__v": 0

我想将一个项目推送到“收入”列表中的数据库，我认为我必须使用以下选项之一：https://mongodb.github.io/node-mongodb-native/markdown-docs/insert.html

我似乎无法弄清楚。 如何将项目推送到我表示的列表中？

在插入项目后，记录应如下所示：

{
"_id": {
    "$oid": "5b93d84aa9123300043c4f8f"
},
"googleId": "110329027039267241635",
"username": "Carl Junior",
"eoUsers": [
    {
        "username": "1@gmail.com",
        "password": "3",
        "loggedIn": false
    },
    {
        "username": "1@gmail.com",
        "password": "3",
        "loggedIn": false
    },
    {
        "username": "1@gmail.com",
        "password": "3",
        "loggedIn": false
    },
    {
        "username": "1@gmail.com",
        "password": "3",
        "loggedIn": false,
         earnings: [['1/20', 0.2], ['1/21', 0.1],  ['I INSERTED', 0.45]]
    },
],
"__v": 0

Answer 1

首先连接到数据库

const mongoose = require('mongoose'); 
mongoose.connect( SPECIAL_KEY , { useNewUrlParser: true });

然后使用我想您已经创建的userSchema在集合中查找记录。

const User = mongoose.model('user', userSchema);  // where 'user' is the name of your collection

查找记录，例如_id，其中包含您要更新的变量

userSchema.findOne({_id: '5b93d84aa9d1a300043c4f8f'})
        .then(OldUserRecord => {
                //Create a new user record, which will be used to overwrite the old
            const newUserRecord_eoUsers = OldUserRecord.eoUsers;
            newUserRecord_eoUsers[3].earnings_log.push( ['value', 0.45] );

                //Update the old user record
            userSchema.update({_id: '5b93d84aa9d1a300043c4f8f'}, {"eoUsers": newUserRecord_eoUsers});
}

将项目推送到mlab记录数组中的数组

1 个答案: