Programmer Think

Preparation Install MongoDB jdk 1.8 maven 3.0 idea Environmental dependence Introduce spring boot starter data mongodb dependency in pom file: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </depen ...

node, express and koa connect MongoDB in the same way. We use mongoose module to connect Read this article about connecting to mysql: koa,express,node general method to connect MySQL Here is just a brief list of the structure of connecting MongoDB. In fact, to really understand MongoDB, you need a lot of knowledge points, such as MongoDB data t ...

1. Combine query according to in, eq, lte and other conditions, and add sort and limit at the same time1, native db.message.find( { receiverRoleId: {$in: [1381073, 1381073]}, resourceType:3, sendTime: {$lte: 1523355918300} }) .sort({sendTime: -1 }) .limit(10); 2,spring data mongoDB Criteria criteria = Criteria.w ...

4 delete page User operation process:1. The user enters the user list and clicks "delete"2. Execute the deletion operation, and prompt "deletion succeeded" or "deletion failed" 4.1 delete page interface definition @ApiOperation("delete page by ID")public ResponseResult delete(String id); 4.2 delete page ...

The notes series of the Buddhism department is a rough summary, which does not seek to be profound but can only be used. Using node to operate mongodb First of all, I assume that mongodb has been installed in your computer. Now let's see how to use nodeJS to operate mongodb. The simple database can also be used for the front-end Xiaobai of serv ...

I saw the guidance of integrating GraphQL in the document of Nest.js, so I wrote a DEMO with Koa first, and then integrated with Nest.js. Write out the database model first (this file exists before, and has not been changed. Change the file name to models.ts): /** * Created by w on 2018/4/13. */ const mongoose = require('mongoose'); mongoose ...

bug review Bug fix timeline At 10:00 p.m. on x month x, the memory of X service began to rise rapidly. At 10:18 on X, users reported that x service memory rose rapidly. mongodb was restarted due to insufficient memory at 10:20 on x Restart x service at 10:22 on X At 11:00 p.m. on x month x, the memory of X service rose rapidly again. At 14:45, ...

Comparison of mgo and mongo-go-driver Introduction to Library mgo: It's driven by MongoDB's Go language. It uses a simple API based on Go grammar to implement rich features and has been well tested. It's easy to use, the documents are enough, and it has been used in the early stage, but it's a pity that it's not maintained. Official website ...

0.5372018.04.22 21:20:07 Word Number 4283 Reading 4842 Mongodb fragmented summary Fragmentation is a method of distributing data across multiple servers. Mongodb uses fragmentation to support deployment of operations with very large datasets and high throughput A database system with large data sets and high throughput applications can ...

Links to the original text: https://my.oschina.net/mohaiyong/blog/221296 Simple queries were made through find/find One, and it seemed too simple to find out in a trance what was mi ...