Mongodb+nodejs复杂查询实例笔记
var MONGO= require("mongodb"), server = new MONGO.Server("127.0.0.1",27017), client = new MONGO.Db('notices',server,{safe:true});client.open(function(err){ if(!err){ client.collection('notices',function(err,collection){ if(err){ console.log("collection error"); client.close(); return; } collection.find( {a:{$lt:9,$gte:1,$exists:true}}, {sort:{a:-1,_id:1},skip:2,limit:3}, function(err,results){ if(err){ client.close(); console.log("collection find error"); return; } results.toArray(function(err,arr){ client.close(); if(err){ console.log("results toArray error"); return; } console.log(arr); process.exit(); }); }); }); } else { console.log("db open error"); }});
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