document https://www.mongodb.com/docs/manual/aggregation/ Operators for aggregation queries https://www.mongodb.com/docs/manual/reference/operator/aggregation/ Classification of Aggregate Query Operators arithmetic expression operator array expression operator boolean expression operator comparison expression operator conditional expression operator … Common Mongo aggregation operations are compared with mysql queries SQL Aggregate where $match group by $group having $match select $project order by $project limit $limit sum() $sum

Use aggregation query Use EntityRepository from the @mikro-orm/mongodb package instead of the @mikro-orm/core package. // import { EntityRepository } from ‘@mikro-orm/core’; import { EntityRepository } from ‘@mikro-orm/mongodb’ ; class User { constructor ( @InjectRepository (User) private readonly userRepository: EntityRepository<User>, ) {} @Get () find ( ) { return this . userRepository . aggregate ([]); }}

9000 port occupation problem Open the resource monitor , find the process name: xp.cn_cgi.exe , and you will see the occupied port. If you have 4 versions of PHP installed on your machine, then there will be 4 corresponding xp.cn_cgi.exe processes and Occupies 4 ports: increase from 9000. Executing netstat -ano | findstr 9000 will

configuration Configuration path: “Website” on the left menu bar => click the “Management” button of the website to be configured => click the “pseudo-static” button, enter the pseudo-static code, and restart Nginx . example if (!-e $request_filename ) { rewrite ^(.*)$ /index.php?s= $1 last ; break;} The above is the Nginx pseudo-static code of Thinkphp.

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Puppeteer’s official documentation on Docker https://pptr.dev/guides/docker Push the official Puppeteer Docker image to Alibaba Cloud There is no official image maintained by Puppeteer on hub.docker.com, because the official image is hosted on Github. So we need to pull down the image, and then push it to the mirror service in the country to increase the

Specifically, it is to use heatmap.js to create a heat map, how to get the canvas of the heat map and paste it on Cesium. parameter: noLisenerCamera?: boolean//Do not monitor the camera cameraHeightDistance?: number//The difference between camera heights, re-render the basemap when it is greater than this value renderType?: RenderType//rendering type points: HeatmapPoint[] bounds?: number[]