Question

我正面临一个问题，实际上我有mongoose模块

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var saveVisitorsDetails = new Schema({
  userId : { type: String, unique: true, dropDups: true},
  visitorName : { type: String},
  visitorMobileNumber : { type: Number},
  expireStatus : { type : Number},
  clientUnreadMessageCount : { type : Number},
  adminUnreadMessageCount : { type : Number},
  visibleVisitorChat : { type : Boolean},
  visibleAdminChat : { type : Boolean},
  displayAdminChat : { type : Boolean},
  activeChat : { type : Boolean},
  adminId : { type : String},
  visitorMsg : { type : String},
  msgTiming : { type : Date},
  showVisitorCross : { type : Boolean},
  showVisitorMinimize : { type : Boolean},
  newMessageForAdmin : { type : Boolean},
  expireUserForAdmin : { type : Boolean},
  visitorLocationObject : { type : Object }
});

module.exports = mongoose.model('Visitor',saveVisitorsDetails);

我想从现在起5分钟后查询msgTiming的所有文档，但我无法得到它。

我的查询是

var express = require('express');
var app = express();
var Visitor = require('./models/visitor');
app.post('/loadVisitorDetails', function(req, res){
    Visitor.collection.find({adminId : req.body.adminId ,expireStatus : 0}).sort({msgTiming : -1}).toArray(function(err, result){
        if(err){
            console.log(err);
        }else{
            var obj = {
                rslt : result,
                id : req.body.adminId
            }
            res.send(obj);
        }
    });
});

我不知道如何查找从现在起5分钟内的所有记录，响应数组应该在msgTiming安排上

请帮助我，过去2天我一直面临这个问题;任何建议将不胜感激

提前致谢

Answer 1

Manjeet的回答很不错，应该在after.getMinutes-5而不是+上做一个小小的修正。

var express = require('express');
var app = express();
var Visitor = require('./models/visitor');
app.post('/loadVisitorDetails', function (req, res) {
    let now = new Date();
    let after = new Date();
    after.setMinutes(after.getMinutes() - 5);
    let critria = {
        $and: [{
            adminId: req.body.adminId
        }, {
            expireStatus: 0
        }, {
            msgTiming: {
                $gte: now,
                $lte: after
            }
        }]
    };

    let projection = {}
    let options = { sort:{ msgTiming : -1 }}

    Visitor.collection.find(critria,projection,options,function(err,result){
        if(err){
            console.log(err)
        } else {
            console.log(result)
        }
    })       
});

Answer 2

你可以这样做

var express = require('express');
var app = express();
var Visitor = require('./models/visitor');
app.post('/loadVisitorDetails', function (req, res) {

    let now = new Date();
    let after = new Date();
    after.setMinutes(after.getMinutes() + 5);
    let critria = {
        $and: [{
            adminId: req.body.adminId
        }, {
            expireStatus: 0
        }, {
            msgTiming: {
                $gte: now,
                $lte: after
            }
        }]
    };

    let projection = {}
    let options = { sort:{ msgTiming : -1 }}

    Visitor.collection.find(critria,projection,options,function(err,result){
        if(err){
            console.log(err)
        } else {
            console.log(result)
        }
    })       
});

Answer 3

你必须使用moment npm

首先将访问者模型架构中的msgTiming : { type : Date},更改为msgTiming : { type : Number}。

当您插入已审核时，请在对象中设置msgTiming: moment().unix()。

它将存储current unix timestamp in seconds，如1318874398

app.post('/loadVisitorDetails', function(req, res){
       var currenttime= moment().unix();
       var 5minbefore=currenttime-300;  // (5 * 60)
       Visitor.collection.find({adminId : req.body.adminId,expireStatus : 0,msgTiming:{$gt: 5minbefore, $lte : currenttime}},
                     function(err, result){
                         console.log(result);
                      });
});

Node Mongo Db查找几分钟的记录

3 个答案: