when node.js connects to mongodb and executes MongoClient.connect (), it is very fast in the local environment, but very slow to get online, which takes more than 1 second, as shown below: var express = require( express ); var router = express.Router...
function searchData(){ NodeInfo.find({}, function(err, res){ if(err) { console.log("Error:" + err); } console.log(JSON.stringify(res,null,2)); 1 return res; }) } let a = searchData(); conso...
simulate a scenario: A single-node backup of MongoDB is done at 11:00, and the backup ends at 11:10, and the backup data at this time is 11:10. accidentally delete data at 11:20 in this case, we can restore the data to 11:10 through the backup data ...
question: at present, what images are stored in mongodb is only a relative drive, so how to provide a complete image path to the server when returning to the front end? in the database: products img1.png actual returned data: http: xxx.xxx.xxx.xx...
2018-06-01T21:50:27.381+1000 I STORAGE [initandlisten] WiredTiger message [1527853827:381260][6025:0x7fffb1251380], txn-recover: Recovering log 88 through 89 2018-06-01T21:50:27.448+1000 I STORAGE [initandlisten] WiredTiger message [1527853827:448472][...
linux system starts after installing MongoDB: . bin mongod: error while loading shared libraries: libssl.so.10: cannot open shared object file: No such file or directory ...
the bin directory was not found on the server. How to use the command mongodump-h for database backup. Thank you ...
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I want to update the data of a field in the mongodb database in batches. The database is as follows. Use https: www.baidu.com to 127.0.0.1 in the database. { "_id" : ObjectId("5aaf69069c49ac25b89903b5"), "title" :...
the computer is a WIN 10 system I follow this tutorial to install mongoDB, http: www.runoob.com mongodb. but as soon as you enter the mongo link. Just report this error has been reinstalled several times, but it has not been solved. also chan...
ask the gods, how can I climb out of the last 2.1610 in the gray part of the html of this web page? and I have a series of html pages that are highly similar to this page. I want to climb out of this string of numbers in the same position. How shoul...
let arr = [] { a: 1, b: 2, c: 3, children: [ { id: 1, a: 1-1, b: 1-2, c: 1-3, } ] }, { a: 2-1, b: 2-2, c: 2-3, children: [] } ] to change the data format to keyfu...
just now on a whim, F12 opened the browser console when logging in to codeshelper and found that the password was transmitted in plaintext and felt incomprehensible. ...
terminate called after throwing an instance of std::system_error what (): Resource temporarily unavailable The code throws this error and then terminates what s going on ...
recently, I encountered some problems when I helped a friend crawl the content on a biological website. the url of the website is as follows: https: www.ncbi.nlm.nih.gov . 20 500 : The code for the crawler is as follows: import requests f...