Loop until unique?

gistfile1.js

		var name_is_unique = false;
		var name;

		while (!name_is_unique) {
			name = namer.generate();

			var waiting_on_db = true;
			User.find({name: name}, function(err,docs) {
				if (docs.count > 0) {
					name_is_unique = true;
				}
				waiting_on_db = false;	
			});
			while (waiting_on_db) {}
		}