Example drop collection in mongoDB with nodejs

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://192.168.1.122:27017/";

 

MongoClient.connect(url, function(err, db) {

  if (err) throw err;

  var dbo = db.db("mydb");

  //Delete the "customers" collection:

  dbo.collection("customers").drop(function(err, delOK) {

    if (err) throw err;

    if (delOK) console.log("Collection deleted");

    db.close();

  });

});

 

Run and result:

 

C:\Nodejs>node mongodbDeleteCollection.js

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://192.168.1.122:27017/";

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();

  });

});

 

Run and result:

 

C:\Nodejs>node mongodbDeleteCollection.js

Collection deleted