Node.js MongoDB Drop
Thursday 28 June 2018
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Drop Collection
You can delete a table, or collection as it is called in MongoDB, by using the
drop()
method.
The
drop()
method takes a callback function containing the error object and the result parameter which returns true if the collection was dropped successfully, otherwise it returns false.Example
Delete the "customers" table:
var MongoClient = require('mongodb').MongoClient;
var url = "mongodb://localhost:27017/";
MongoClient.connect(url, function(err, db) {
if (err) throw err;
var dbo = db.db("mydb");
dbo.collection("customers").drop(function(err, delOK) {
if (err) throw err;
if (delOK) console.log("Collection deleted");
db.close();
});
});
Save the code above in a file called "demo_drop.js" and run the file:
Run "demo_drop.js"
C:\Users\Your Name>node demo_drop.js
Which will give you this result:
Collection deleted
db.dropCollection
You can also use the
dropCollection()
method to delete a table (collection).
The
dropCollection()
method takes two parameters: the name of the collection and a callback function.Example
Delete the "customers" collection, using dropCollection():
var MongoClient = require('mongodb').MongoClient;
var url = "mongodb://localhost:27017/";
MongoClient.connect(url, function(err, db) {
if (err) throw err;
var dbo = db.db("mydb");
dbo.dropCollection("customers", function(err, delOK) { if (err) throw err;
if (delOK) console.log("Collection deleted");
db.close();
});
});
Save the code above in a file called "demo_dropcollection.js" and run the file:
Run "demo_dropcollection.js"
C:\Users\Your Name>node demo_dropcollection.js
Which will give you this result:
Collection deleted
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