node.js

Relational database design to mongoDB/mongoose design

由 自作多情 提交于 2021-02-18 06:41:09
问题 I have recently started using mongoDB and mongoose for my new node.js application. Having only used relational databases before I am struggling to adapt to the mongoDB/noSQL way of thinking such as denormalization and lack of foreign key relationships. I have this relational database design: **Users Table** user_id username email password **Games Table** game_id game_name **Lobbies Table** lobby_id game_id lobby_name **Scores Table** user_id game_id score So, each lobby belongs to a game, and

Dealing with slash characters in request parameter using Express route

由 旧街凉风 提交于 2021-02-18 06:40:13
问题 I'm currently working on a URL shortener app using Express. I want the user to be able to enter a URL like this: https://www.exampleurlshortener.com/new/https://www.google.com The problem is whenever I try to specify the parameter using Express it will only extract the 'https:' section and everything after that is lost because the 2 backslashes are registering as a new route: app.get('/new/:url', (req, res) => { console.log(req.params.url) // outputs 'https:' I thought about specifying each

Using Fragment to insert HTML rendered on the back end via dangerouslySetInnerHTML

由 拈花ヽ惹草 提交于 2021-02-18 06:34:24
问题 I used to compile and insert JSX components via <div key={ ID } dangerouslySetInnerHTML={ { __html: HTML } } /> which wrapped my HTML into a <div> : <div>my html from the HTML object</div> Now react > 16.2.0 has support for Fragments and I wonder if I can use that somehow to avoid wrapping my HTML in a <div> each time I get data from the back end. Running <Fragment key={ ID } dangerouslySetInnerHTML={ { __html: HTML } } /> will throw a warning Warning: Invalid prop `dangerouslySetInnerHTML`

Using Fragment to insert HTML rendered on the back end via dangerouslySetInnerHTML

由 筅森魡賤 提交于 2021-02-18 06:33:15
问题 I used to compile and insert JSX components via <div key={ ID } dangerouslySetInnerHTML={ { __html: HTML } } /> which wrapped my HTML into a <div> : <div>my html from the HTML object</div> Now react > 16.2.0 has support for Fragments and I wonder if I can use that somehow to avoid wrapping my HTML in a <div> each time I get data from the back end. Running <Fragment key={ ID } dangerouslySetInnerHTML={ { __html: HTML } } /> will throw a warning Warning: Invalid prop `dangerouslySetInnerHTML`

Vue3.0源码解析来一篇

由 安稳与你 提交于 2021-02-18 06:20:38
Vue.js 3.0 "One Piece" 已经正式发布，相比之前速度更快、体积更小、更易于维护。 与2.0相比， Vue3.0的代码组织更为清晰合理 。在项目的packages目录下分为了好几个模块。比如用于编译模板的 compiler-core模块 ，用于运行时的 runtime-core模块 和 runtime-dom模块， 用于服务端渲染的 server-renderer 模块等等。 当然，一定会有同学问，Vue2.0我已经很精通了，为什么还要学3.0？ 首先，Vue3.0的源码中有很多问题的解决方案，如果熟练掌握这些方案，将会更有利于我们今后的工作。 其次，学习Vue3.0能够 提升自己解读源码的能力 ， 掌握解读源码的深层规律 ， 有利于后期学习其他框架或接手新的项目开发 。 作为一个合格的前端开发程序员，如果你想要更上一个台阶，拿到更高的薪水，学习的速度一定要赶上技术更新的速度。所以，Vue3.0的进阶学习十分必要。 其实从去年下半年Vue.js 3.0的alpha版本出来后，网络上就铺天盖地的出现一些解析源码类的文章，不过大部分文章都浮于表面，能够带来的帮助也十分有限，不能进行深入分析。 而且vue 3.0用了大量的 Reflect/Proxy/Symbol/Map/Set，你需要确保这些api你都了如指掌。 因此，对于拥有vue基础的同学们来说

WebStorm - Unresolved variable or type - Sails / module.export [duplicate]

由 你离开我真会死。 提交于 2021-02-18 06:03:48
问题 This question already has answers here : Webstorm 7 cannot recognize node API methods (5 answers) Closed 1 year ago . Trying to fix WebStorm v11.0.4 warnings in JavaScript. Lots of unresolved variable or type errors for custom types in SailsJS application, such as this one: I already enabled Node.js in WebStorm. Also, don't know if it is linked, but cannot see "Node Globals" as a library to enable (see pictures below). Now, I'm clearly not a JavaScript pro. There is a file called DataService

Long Loops in Node.js: Yielding Using Timers?

由 橙三吉。 提交于 2021-02-18 05:39:06
问题 I'm using Node.js to loop through what could eventually be a pretty big array of posts. If I were doing something similar using client side JavaScript , I would use timers as explained here so as not to block the thread. My Question is: "Is still a sound practice server side?" or "Should I approach the problem differently?" 回答1: The proper way to do that in node.js is to break up your work into chunks and use process.nextTick to queue the next chunk once the current one has completed. That

How to deploy one app from a large monorepo with dependencies to packages in the same repo to google app engine?

由 邮差的信 提交于 2021-02-18 04:56:29
问题 I have a large node.js monorepo with several applications and packages and inter dependencies. It is all managed with yarn workspaces and a little bit of lerna. Everything works great for me, however I am having trouble trying to deploy one of the applications in this monorepo to google app engine. The main issue is that the app engine wants to install packages that are located only locally and are not on npm, and it throws an error. I've scoured the google cloud documentations but did not

Mongoose find all documents where array.length is greater than 0 & sort the data

由 血红的双手。 提交于 2021-02-18 04:13:44
问题 I am using mongoose to perform CRUD operation on MongoDB. This is how my schema looks. var EmployeeSchema = new Schema({ name: String, description: { type: String, default: 'No description' }, departments: [] }); Each employee can belong to multiple department. Departments array will look like [1,2,3]. In this case departments.length = 3. If the employee does not belong to any department, the departments.length will be equal to 0. I need to find all employee where EmployeeSchema.departments

Mongoose find all documents where array.length is greater than 0 & sort the data

由 拥有回忆 提交于 2021-02-18 04:07:40
问题 I am using mongoose to perform CRUD operation on MongoDB. This is how my schema looks. var EmployeeSchema = new Schema({ name: String, description: { type: String, default: 'No description' }, departments: [] }); Each employee can belong to multiple department. Departments array will look like [1,2,3]. In this case departments.length = 3. If the employee does not belong to any department, the departments.length will be equal to 0. I need to find all employee where EmployeeSchema.departments
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