The user enters the user name and password on the page and jumps to the matching page in mongoDB. Then how does the front page match the data in the database? Those who wish to do so will be grateful to give a hint to the novice. … Using JavaScript to Get the Content of ..
Category : question
import java.net.UnknownHostException; import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject; import com.mongodb.Mongo; public class HelloMongoDB { private static Mongo mg; private static DB db; private static DBCollection col; public static void main(String[] args) throws UnknownHostException { HelloMongoDB hello = new HelloMongoDB(); if (mg == null) { mg = new Mongo(“127.0.0.1”, 27017); } if ..
import java.net.UnknownHostException; import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject; import com.mongodb.Mongo; public class HelloMongoDB { private static Mongo mg; private static DB db; private static DBCollection col; public static void main(String[] args) throws UnknownHostException { HelloMongoDB hello = new HelloMongoDB(); if (mg == null) { mg = new Mongo(“127.0.0.1”, 27017); } if ..
A component of angular has to display different news articles repeatedly, but these articles contain pictures and the positions of pictures in the articles are different. Now text and pictures exist in MongoDB, but how to realize mosaic display of pictures and text? This scenario should use..
mongod –dbpath /usr/local/var/mongodb 2018-07-03T10:50:12.444+0800 I CONTROL [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify –sslDisabledProtocols ‘none’ 2018-07-03T10:50:12.457+0800 I CONTROL [initandlisten] MongoDB starting : pid=44555 port=27017 dbpath=/usr/local/var/mongodb 64-bit host=huhaifengdeMacBook-Pro.local 2018-07-03T10:50:12.457+0800 I CONTROL [initandlisten] db version v4.0.0 2018-07-03T10:50:12.457+0800 I CONTROL [initandlisten] git version: 3b07af3d4f471ae89e8186d33bbb1d5259597d51 2018-07-03T10:50:12.457+0800 I CONTROL [initandlisten] allocator: system 2018-07-03T10:50:12.458+0800 I CONTROL [initandlisten] modules: ..
It was installed directly with MSI, and there was a problem during startup. How do you solve it? The following is my log file: C:UsersAdministrator>mongoMongoDB shell version v3.4.7connecting to: mongodb://127.0.0.1:270172017-08-16T23:45:23.316+0800 W NETWORK [thread1] Failed to connect to 127.0.:27017 after 5000ms milliseconds, giving up.2017-08-16T23:45:23.317+0800 E QUERY [thread1] Error: couldn’t connect tover 127.0.0.1:27017, connection attempt failed :connect@src/mongo/shell/mongo.js:237:13@(connect):1:6exception: ..
2. user:{ father:objectid, } What if the foreign key is empty, only string can be stored? If you do not set the Objectid of mongodb, the system will automatically ge..
The new version does not allow unique index to be created in duplicate. Because he also does not know how to deal with duplicate data So remove the duplication and build it again. Please refer to the following discussion posts:http://forum.foxera.com/mon..
Hello, everyone, why did mongodb delete mongoD. Lock when starting Mongo the next day and then all the data was lost? What is the reason? Solution First of all,mongod.lockYesmongoA lock file created in the hard disk after the server starts, if you exit normallymongodService, even if the file still exists, it will not affect the ..
If we say that there are n comments on a product, will there be any problem if it is directly stored in a document of mongo? Is there a problem reading redis through python or php? No problem, what are you wor..
At present, there are many mp3 files with the following file names 1-music1.mp3 2-music2.mp3 3-music3.mp3 4-music4.mp3 5-music5.mp3 ….. 10-music.mp3 How to remove the prefix in batch. The title was wrong. The title was batch renaming.Batch renaming can be usedlsAnd pipes andrenameCommandSimilar to the following bulk delete command. ls | grep “^[0-9]\{1,2\}-music.mp3″ | xargs -d”\n” rmhttp://superuser.com/questions/392872/delete-files-with-regular-..
After passing through the aggregate function in mongo: group (), the DBObject object is returned. what should I do if I want to store it in another set? ? ? Later, I knew for myself that it was ok to put it directly into a document and insert it into the col..