matoski.com

I needed to drop all the databases or based on a filter in MongoDB.

The easiest way for would be to run the following javascript command.

var dbs = db.getMongo().getDBNames();
dbs.forEach(function(dbName) {
    dbd = db.getMongo().getDB( dbName );
        print("Dropping " + dbName + " database");
        db.dropDatabase();
})

If you want to actually filter on this you can always add a condition to the drop, like drop all the databases that begin with stats_ you can do like this

var dbs = db.getMongo().getDBNames();
dbs.forEach(function(dbName) {
    dbd = db.getMongo().getDB( dbName );
    if (dbName.startsWith("stats_")) {
        print("Dropping " + dbName + " database");
        db.dropDatabase();
    }
})