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  • node 实现删除数据

    1.单条删除 -- deleteOne

    var MongoClient = require('mongodb').MongoClient;
    var url = require('./config/keys').mongoURI;
    
    /**
     * 单条删除
     * deleteOne
    */
    MongoClient.connect(url, { useNewUrlParser: true, useUnifiedTopology: true }, function(err, db) {
      if(err) throw err;
      var dbo = db.db('koa'); // koa 库名
      var whereStr = {'name': '测试人员'}; // 查询条件
      dbo.collection('users').deleteOne(whereStr, function(err, res) {
        if(err) throw err;
        console.log('文档删除成功');
        db.close();
      })
    });
    

    2.批量删除 -- deleteMany

    var MongoClient = require('mongodb').MongoClient;
    var url = require('./config/keys').mongoURI;
    
    /**
     * 批量删除
     * deleteMany
    */
    MongoClient.connect(url, { useNewUrlParser: true, useUnifiedTopology: true }, function(err, db) {
      if(err) throw err;
      var dbo = db.db('koa'); // koa 库名
      var whereStr = {'age': '20'}; // 查询条件
      dbo.collection('users').deleteMany(whereStr, function(err, res) {
        if(err) throw err;
        console.log(res.deletedCount + ' 条文档删除成功');
        db.close();
      })
    });
    

    .

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  • 原文地址:https://www.cnblogs.com/crazycode2/p/15110262.html
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