错误@数据库连接初始化：错误：数据库名称必须是字符串

Question

我只是尝试连接mongodb。但它显示

  

错误@数据库连接初始化：错误：数据库名称   必须是一个字符串

以下是代码：

try {
mongoDb.connect("localhost:27017/sample");
var db = mongoDb
}
catch (err) {
console.log('Error @ Database Connection Initialization : ' + err);
}

Answer 1

请试试这个

// Initialize connection once
MongoClient.connect("mongodb://localhost:27017/sample", function(err, database) {
  if(err) return console.error(err);

  db = database;

  // the Mongo driver recommends starting the server here because most apps *should* fail to start if they have no DB.  If yours is the exception, move the server startup elsewhere.
});