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Node.js MongoDB 创建集合


MongoDB 中的**集合**相当于 MySQL 中的**表**

创建集合

要创建 MongoDB 集合,请使用 createCollection() 方法

示例

创建一个名为 "customers" 的集合

var MongoClient = require('mongodb').MongoClient;
var url = "mongodb://127.0.0.1:27017/";

MongoClient.connect(url, function(err, db) {
  if (err) throw err;
  var dbo = db.db("mydb");
  dbo.createCollection("customers", function(err, res) {
    if (err) throw err;
    console.log("集合已创建!");
    db.close();
  });
});
运行示例 »

将以上代码保存到名为 "demo_mongodb_createcollection.js" 的文件中并运行该文件

运行 "demo_mongodb_createcollection.js"

C:\Users\您的用户名>node demo_mongodb_createcollection.js

将得到以下结果

集合已创建!

**重要:**在 MongoDB 中,只有在集合包含内容后才会创建!

MongoDB 会等到您插入文档后才会真正创建集合。


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