Mongoose的模糊查询

 var Commidity = require("./Model/commiditiesModel");
 function search(response,request,key){
     var search = new RegExp(key);
   var query = { "title": search}
   console.log(query);
   Commidity.find(query,function(err, articles) {
     if (err) return console.error(err);
     console.dir(articles);
     response.writeHead(200, {"Content-Type": "application/json"});
     response.write(JSON.stringify(articles));
     response.end();
   });
 }

 exports.search = search;