The first time I came into contact with the node project, I used the node-mongodb-native module officially provided by mongodb to connect and operate mongodb.
I connected the database in the entrance app.js, but I want to operate the database elsewhere. Here is what I do:
var MongoClient = require('mongodb').MongoClient()
MongoClient.connect(url, function(err, db) {
global.db = db
})I mounted the db parameters under global so that the database can be operated anywhere else:
global.db.collection('documents')I feel like there will be problems with this, but I can’t tell where the problem is. Please give me some advice.
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Usually the database connection is done in app.js/server.js, and the database operation part is:
1. You can write it directly in app.js/server.js;
2. You can also save it separately in other files, just require it in app.js/server.js;
For example, the code for collection operation of user is placed in user.js, module.exports in user.js; and then required in app.js/server.js.
It’s just a form of code organization. You can choose according to your own situation.
So it is recommended that you consider the above approach.
For reference.
Love MongoDB! Have fun!