node.js

问题 I'm trying to run the NextJS on a Docker container using Dockerfile and running via docker-compose, after I changed my code in a JS file (such as index.js) the Next server did not reload. But when I've tried to run outside without using Docker (by executing the "npm run dev" command directly) the Next server did reload smoothly. I've also tried to run the server by "nodemon" command (inside a container), it did not make it either. Dockerfile: FROM node:10.14.2-alpine COPY . /home/next_app

问题 I was learning Node.js and also found out that Node.js is best to be used with I/O intensive tasks which confused me a bit. So, after some research I found this statement: "An application that reads and/or writes a large amount of data". So, does it mean that Node.js is best to be used with data, that is, read big data, take necessary data from that and send back to client? 回答1: A nodejs application can be architectured just fine to include non-I/O things and is not just suited for big data

问题 I am repeatedly seeing the following error when synchronizing a users cart through a "/sync/" API request. This is called whenever a user changes the contents of their shopping cart. VersionError: No matching document found for id "2y4b1hq601cd013e0af25e32" version 4 modifiedPaths "cart, cart.items, cart.updatedAt" at VersionError.MongooseError [as constructor] (/node_modules/mongoose/lib/error/mongooseError.js:13:11) at new VersionError (/node_modules/mongoose/lib/error/version.js:18:17) at

问题 I was learning Node.js and also found out that Node.js is best to be used with I/O intensive tasks which confused me a bit. So, after some research I found this statement: "An application that reads and/or writes a large amount of data". So, does it mean that Node.js is best to be used with data, that is, read big data, take necessary data from that and send back to client? 回答1: A nodejs application can be architectured just fine to include non-I/O things and is not just suited for big data

问题 I need to make a HTTP GET request to foreign server to start receiving events. After request I immediately get multipart/x-mixed-replace response. When an event occurs, it's sent as XML message together with boundary indicating the end of this part. Now I must implement it in Node.js. With normal request I use node-rest-client , call its get() method and put my logic in method's callback. Trouble is that callback is executed only when response is finished and with multipart/x-mixed-replace it

问题 I have a project that I've been working with for quite some time and it has built and compiled (and still does on a different machine) for months. Now, when I run the command npm install it runs as normal, but at the end of the process, it builds out tons of .cmd files (and another accompanying file) in the root folder of my project. when I run ng serve i get the error: Unknown browser query basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')") I'm completely stumped as to how to get my

问题 I have a model with an enum field, and currently documents can have any single value from the enum. I want documents to be allowed to have an array of values, but have mongoose enforce that all of the values are valid options that exist in the enum - is that possible? Essentially I want the equivalent of a HTML <select multiple> element instead of a <select> 回答1: Yes, you can apply an enum to a path that's defined as an array of strings. Each value will be passed to the enum validator and

问题 I am reading Node.js Design Patterns. I am stuck in understanding of reactor pattern. I do not see any call stack here. I thought call stack was one of the main parts of Node.js design. Can anyone please help me understand this diagram? Also there is no callback queue. 回答1: Everything starts with the application, application makes requests and the event demultiplexer gathers those requests then forms queues, Event Queues. Event demultiplexer is run by libuv which is an asynchronous IO library

问题 There are two models defined by Sequelize: Post and Tag with many-to-many association. Post.belongsToMany(db.Tag, {through: 'post_tag', foreignKey: 'post_id', timestamps: false}); Tag.belongsToMany(db.Post, {through: 'post_tag', foreignKey: 'tag_id',timestamps: false}); On a "tag" page I want to get tag data, associated posts and show them with pagination. So I should limit posts. But If I try limit them inside "include" Tag.findOne({ where: {url: req.params.url}, include: [{ model : Post,

问题 Here's an example (Express 3) middleware setup thats worked for me globally: app.configure(function () { app.use(express.static(__dirname + "/public")); app.use(express.bodyParser({ keepExtensions: true, limit: 10000000, // set 10MB limit defer: true })); //... more config stuff } For security reasons, I don't want to allow 500GB+ posts on routes other than /upload , so I'm trying to figure out how to specify the limit on specific routes, rather than globally in the middleware. I know the