First of all, to ensure proper installation of MongoDB, installation reference: Http://docs.mongodb.org/manual/tutorial/install-mongodb-on-debian-or-ubuntu-linux
You can also refer to my other blog post.
Http://www.cnblogs.com/sexintercourse/p/5774310.html
Guide the development of MONGO and NODEJS
Then download the Nodejs MongoDB driver
NPM Install MongoDB
To write a test program:
1 var MongoDB = require (' MongoDB ');
2 var server = new MongoDB. Server (' localhost ', 27017,{auto_reconnect:true});
3 var db = new MongoDB. Db (' MyDB ', server,{safe:true});
4 Db.open (function (err,db) {
5 if (!err)
6 {
7 Console.log (' Connect ');
8}else{
9 Console.log (ERR);
10}
11
12});
If connect is finally displayed, it indicates success.
Operation on MongoDB's collection
There are two ways to link collection, respectively:
Db.collection (' Mycoll ', function (Err,coll) {});
Db.createcollection (' Mycoll ', function (Err,coll) {});
The two methods also have a second optional parameter {safe:true}, the role of this parameter for the first method, if added to this parameter, then when the collection does not exist when the error, for the second method, when the collection exists error
Example:
1 var MongoDB = require (' MongoDB ');
2 var server = new MongoDB. Server (' localhost ', 27017,{auto_reconnect:true});
3 var db = new MongoDB. Db (' MyDB ', server,{safe:true});
4 Db.open (function (err,db) {
5 if (!err)
6 {
7 Console.log (' Connect ');
8 db.collection (' Mycoll ', {safe:true},function (err,collection) {
9 if (err) {
Ten console.log (ERR);
11}
12});
13
}else{
Console.log (ERR);
16}
17
18});
Results:
Example:
1 var MongoDB = require (' MongoDB ');
2 var server = new MongoDB. Server (' localhost ', 27017,{auto_reconnect:true});
3 var db = new MongoDB. Db (' MyDB ', server,{safe:true});
4 Db.open (function (err,db) {
5 if (!err)
6 {
7 Console.log (' Connect ');
8 db.createcollection (' Mycoll ', {safe:true},function (err,collection) {
9 if (err) {
Ten console.log (ERR);
11}
12});
13
}else{
Console.log (ERR);
16}
17
18});
Results:
Deleting collection uses the Dropcollection function:
Example:
1 var MongoDB = require (' MongoDB ');
2 var server = new MongoDB. Server (' localhost ', 27017,{auto_reconnect:true});
3 var db = new MongoDB. Db (' MyDB ', server,{safe:true});
4 Db.open (function (err,db) {
5 if (!err)
6 {
7 Console.log (' Connect ');
8 db.dropcollection (' Mycoll ', {safe:true},function (Err,result) {
9 Console.log (Result);
10});
11
}else{
Console.log (ERR);
14}
15
16});
Results:
The collection is checked for additional
Adding data to collection using the Insert function
Example:
1 var MongoDB = require (' MongoDB ');
2 var server = new MongoDB. Server (' localhost ', 27017,{auto_reconnect:true});
3 var db = new MongoDB. Db (' MyDB ', server,{safe:true});
4 Db.open (function (err,db) {
5 if (!err)
6 {
7 db.collection (' Mycoll ', {safe:true},function (err,collection) {
8 var tmp1 = {title: ' Hello ', number:1};
9 Collection.insert (Tmp1,{safe:true},function (err,result) {
Ten console.log (Result);
11});
12});
}else{
Console.log (ERR);
15}
16
17});
Results
To update the data:
Example:
1 var MongoDB = require (' MongoDB ');
2 var server = new MongoDB. Server (' localhost ', 27017,{auto_reconnect:true});
3 var db = new MongoDB. Db (' MyDB ', server,{safe:true});
4 Db.open (function (err,db) {
5 if (!err)
6 {
7 db.collection (' Mycoll ', {safe:true},function (err,collection) {
8 Collection.update ({title: ' Hello '},{$set: {number:3}},{safe:true},function (Err,result) {
9 Console.log (Result);
10});
11
}else{
Console.log (ERR);
14}
15
16});
17
Results:
Delete the data by using the Remove function
Example:
1 var MongoDB = require (' MongoDB ');
2 var server = new MongoDB. Server (' localhost ', 27017,{auto_reconnect:true});
3 var db = new MongoDB. Db (' MyDB ', server,{safe:true});
4 Db.open (function (err,db) {
5 if (!err)
6 {
7 db.collection (' Mycoll ', {safe:true},function (err,collection) {
8 Collection.remove ({title: ' Hello '},{safe:true},function (err,result) {
9 Console.log (Result);
10});
11
}else{
Console.log (ERR);
14}
15
16});
Results
If remove does not have any parameters, delete all.
Find operations, find operations there are two methods one is find, one is FindOne
Example:
1 var MongoDB = require (' MongoDB ');
2 var server = new MongoDB. Server (' localhost ', 27017,{auto_reconnect:true});
3 var db = new MongoDB. Db (' MyDB ', server,{safe:true});
4 Db.open (function (err,db) {
5 if (!err)
6 {
7 db.collection (' Mycoll ', {safe:true},function (err,collection) {
8 var tmp1 = {title: ' Hello '};
9 var tmp2 = {title: ' World '};
Ten Collection.insert ([Tmp1,tmp2],{safe:true},function (Err,result) {
One console.log (result);
12});
Collection.find (). ToArray (function (Err,docs) {
Console.log (' find ');
Console.log (Docs);
16});
Collection.findone (function (Err,doc) {
Console.log (' FindOne ');
Console.log (DOC);
20});
21});
Nodejs to the MongoDB database additions and deletions to the operation (reprint)
