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Node.js MongoDB 删除集合


删除集合

您可以使用 drop() 方法删除表,或者在 MongoDB 中称为集合。

drop() 方法接受一个回调函数,该函数包含错误对象和结果参数,如果集合成功删除,则返回 true,否则返回 false。

示例

删除 "customers" 表

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.collection("customers").drop(function(err, delOK) {
    if (err) throw err;
    if (delOK) console.log("集合已删除");
    db.close();
  });
});
运行示例 »

将以上代码保存到名为 "demo_drop.js" 的文件中,然后运行该文件。

运行 "demo_drop.js"

C:\Users\您的用户名>node demo_drop.js

您将得到以下结果

集合已删除


db.dropCollection

您还可以使用 dropCollection() 方法删除表(集合)。

dropCollection() 方法接受两个参数:集合的名称和一个回调函数。

示例

使用 dropCollection() 删除 "customers" 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.dropCollection("customers", function(err, delOK) {
    if (err) throw err;
    if (delOK) console.log("集合已删除");
    db.close();
  });
});
运行示例 »

将以上代码保存到名为 "demo_dropcollection.js" 的文件中,然后运行该文件。

运行 "demo_dropcollection.js"

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

您将得到以下结果

集合已删除

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