动态查询以获取用户输入并从数据库中进行过滤 node.js

Question

enter image description here我正在尝试从用户输入的用户那里获取列，好的是正在获取列，坏的是我拥有的列申请条件不对 working.Can 有谁帮帮我吗？我想要一个适用于过滤选项的查询，就像在许多网站中一样，可以过滤任何产品或其他东西。新手来啦！！！

routes.post('/FilterCandidate',function(req,res){
   var fetchparameter={};
   var dynamicquery={author : req.user.username};
   if(req.user.username){
   if(req.body.ConsultantName){
       fetchparameter["ConsultantName"] =  req.body.ConsultantName;
     }
   if(req.body.Location){
      fetchparameter["Location"] =  req.body.Location;
     }
   if(req.body.JobRole){
  fetchparameter["JobRole"] =  req.body.JobRole;
     }
   if(req.body.Skills){
      fetchparameter["Skills"] =  req.body.Skills.split(',');
     }
   if(req.body.VisaStatus){
      fetchparameter["VisaStatus"] =  req.body.VisaStatus;
     } 
   if(req.body.BillingRate){
      fetchparameter["BillingRate"] =  req.body.BillingRate;
     }
   if(req.body.experience){
      fetchparameter["experience"] = req.body.experience;
     }
   if(req.body.jobtype){
      fetchparameter["jobtype"] = req.body.jobtype;
     }
   if(req.body.Availability){
      fetchparameter["Availability"] = req.body.Availability;
    }
   if(req.body.experience){
      fetchparameter["Salary"] = req.body.Salary;
   }
   if(req.body.Salarytype){
      fetchparameter["Salarytype"] = req.body.Salarytype;
   }
    }


 /* This below code for conditions is not working*/

for(var key in fetchparameter){
   if (key== "Salary" ){
     dynamicquery[key] =  {$gte :fetchparameter[key]};
          }
         if(key == "Skills"){
             dynamicquery [key] = {$in : fetchparameter[key]};
          }
         if(key == "experience"){
            dynamicquery[key] = {$gte :fetchparameter[key]};
          }
         else{
             dynamicquery[key] = fetchparameter[key];
             }
   } 
 console.log(dynamicquery);
    Candidate.aggregate([ {$match : dynamicquery }],(err,docs) =>{
       res.render('FilteredCandidate',{'Candidates' : docs});
       });
 });

这就是我要参考附件图像的输出

Answer 1

我认为你应该制作一个匹配对象数组，它会让你的代码更整洁，希望它能解决你的问题

例如：

var match = {$and:[]};
if(any condition satisfy){
match.$and.push({}) //condition
}

最重要的是检查是否匹配。$and 数组不能为空，如果是则删除 match.$and。此过程将帮助您更好地维护查询并提供更大的灵活性。

动态查询以获取用户输入并从数据库中进行过滤 node.js

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