nedb

Where is NEDB file stored?

由 房东的猫 提交于 2021-02-07 09:44:06
问题 var Datastore = require('nedb') , db = new Datastore({ filename: 'testdb.db', autoload: true });\ var doc = { hello: 'world' , n: 5 , today: new Date() , nedbIsAwesome: true , notthere: null , notToBeSaved: undefined // Will not be saved , fruits: [ 'apple', 'orange', 'pear' ] , infos: { name: 'nedb' } }; db.insert(doc, function (err, newDoc) { console.log(newDoc); }); I can't find "testdb.db" anywhere in my computer, but the console log show the data exist! Any suggestion? 回答1: Give absolute

Where is NEDB file stored?

由 删除回忆录丶 提交于 2021-02-07 09:43:35
问题 var Datastore = require('nedb') , db = new Datastore({ filename: 'testdb.db', autoload: true });\ var doc = { hello: 'world' , n: 5 , today: new Date() , nedbIsAwesome: true , notthere: null , notToBeSaved: undefined // Will not be saved , fruits: [ 'apple', 'orange', 'pear' ] , infos: { name: 'nedb' } }; db.insert(doc, function (err, newDoc) { console.log(newDoc); }); I can't find "testdb.db" anywhere in my computer, but the console log show the data exist! Any suggestion? 回答1: Give absolute

Can I use a file based database on Heroku?

由 不问归期 提交于 2021-01-30 09:09:58
问题 I have a small Node.js / Express app deployed to Heroku. I'd like to use a lightweight database like NeDB to persist some data. Is it possible to periodically backup / copy a file from Heroku if I used this approach? 回答1: File-based databases aren't a good fit for Heroku due to its ephemeral filesystem (bold added): Each dyno gets its own ephemeral filesystem, with a fresh copy of the most recently deployed code. During the dyno’s lifetime its running processes can use the filesystem as a

Can I use a file based database on Heroku?

由 会有一股神秘感。 提交于 2021-01-30 09:09:06
问题 I have a small Node.js / Express app deployed to Heroku. I'd like to use a lightweight database like NeDB to persist some data. Is it possible to periodically backup / copy a file from Heroku if I used this approach? 回答1: File-based databases aren't a good fit for Heroku due to its ephemeral filesystem (bold added): Each dyno gets its own ephemeral filesystem, with a fresh copy of the most recently deployed code. During the dyno’s lifetime its running processes can use the filesystem as a

Can I use a file based database on Heroku?

由 旧时模样 提交于 2021-01-30 09:06:06
问题 I have a small Node.js / Express app deployed to Heroku. I'd like to use a lightweight database like NeDB to persist some data. Is it possible to periodically backup / copy a file from Heroku if I used this approach? 回答1: File-based databases aren't a good fit for Heroku due to its ephemeral filesystem (bold added): Each dyno gets its own ephemeral filesystem, with a fresh copy of the most recently deployed code. During the dyno’s lifetime its running processes can use the filesystem as a

Can't connect to NeDB on render process Electron

由 我的未来我决定 提交于 2021-01-29 19:52:07
问题 I have problem with connect NeDB to my react-electron app. Now I install NeDB on my project and connect him to electron.js file. const Datastore = require('nedb'); let db = {}; db.students = new Datastore({ filename:'./students.json', autoload: true }) db.students.insert({name : "Putin V.V.", year: 1952}); Now I need connect this db to my app.js file. How I can manipulate with this file on render part? GitHub code 回答1: You can achive your idea by using ipc at Electron. I posted an answer

is there a way to prevent duplication of entries in neDB collection's array?

由 杀马特。学长 韩版系。学妹 提交于 2021-01-28 00:07:34
问题 var addNewUser = function (id, chatId) { db.update({ _id: id }, { $push: { users: chatId } }, {}, function (err, numAffected) { // code after the record is updated }); } in this code I want to push new Id to the array if it is not in it. I've read the docs of neDB but it seems there is no way to do that I'm beginner so I think there is a way to do that but I cant see it. 回答1: To push new chatId to users array only if it does not exist, you can use $addToSet . According to the nedb document:

嵌入式数据库NeDB及遇到问题

由 半世苍凉 提交于 2020-04-21 03:20:26
　　NeDB 是使用 Node.js 实现的一个 NoSQL 嵌入式数据库操作模块， 可以充当内存数据库，也可以用来实现本地存储，甚至可以在浏览器中使用。 查询方式比较灵活，支持使用正则、比较运算符、逻辑运算符、索引以及 JSON 深度查询等，适用于不需要大量数据处理的应用系统。 一、安装 　　使用 npm 安装 NeDB ，执行如下命令： npm install nedb --save 二、创建NeDB数据库 1、引入依赖 　　首先，使用 require 引入 nedb ： var NeDB = require( ' nedb ' ) 2、数据库初始化 　　接下来，我们需要初始化一个 NeDB 对象： var db = new NeDB({ filename: ' ./user.db ' , autoload: true , }) 　　初始化数据库时，我们传入两个参数： filename 和 autoload 。 　　第 2 行， filename 用于指定数据存储的文件位置，在本示例中， filename 指定为同个目录下的 user.db ； 第 3 行，设置 autoload 为 true ，用于自动加载数据库。 至此，我们得到了一个数据库对象 db 。 接下来，对数据库进行常规操作：插入、查询、更新、删除。 3、增删改查操作、及配置详情看官网 　　https://www

Update a row in nedb

由 南笙酒味 提交于 2020-01-06 07:44:28
问题 I have the following data in nedb. ["UserId":"1446943507761","UserName":"xxx","link":"xxx.html","taskDone":"false","id":14,"_id":"fdaaTWSxloQZdYlT"] ["UserId":"1446943507761","UserName":"xxx","link":"xxx.html","taskDone":"false","id":1,"_id":"fzh2cedAXxT76GwB"] ["UserId":"1446943507761","UserName":"xxx","link":"xxx.html","taskDone":"false","id":0,"_id":"k4loE7XR5gioQk54"] I am trying to update row with id 0 and set the value of taskDone to true. I use the following query to set the value to

NEDB persistance in Electron app

由 久未见 提交于 2019-12-23 17:10:42
问题 I am trying to connect to nedb from electron app. CRUD operations work great. BUT I don't see db file (D:/my.db, checked for hidden files). File exists somewhere, because it keeps data even after machine reboot. I suspect that electron threats my path as relative, but I can find it anywhere. var Datastore = require('nedb'), db = new Datastore({filename : 'D:/my.db', autoload: true}); var doc = { hello: 'world' , n: 5 , today: new Date() , nedbIsAwesome: true , notthere: null , notToBeSaved:
订阅 nedb