从ejs视图获取JSON数据到控制器

这是我的server.js，

const express = require("express"); var app = express(); var cons = require('consolidate'); const bodyParser = require('body-parser'); app.use(bodyParser.urlencoded({ extended: false })); app.use(bodyParser.json()); app.engine('html', cons.ejs); app.set('view engine', 'html'); app.get("/getAllData", function(req, res) { GPSDataSchemaModel.find({}, function(err, result) { if (err) throw err; if (result) { res.render("index.ejs", { dbData: result }); } else { res.send(JSON.stringify({ error: 'Error' }) )} }) }) app.get("/onmap", function(req, res) { console.log("Query type: " + typeof(req.query)) console.log("Body type: " + typeof(req.body)) console.log("Parameters type: " + typeof(req.params)) res.send(req.query) }) 

这里是我的index.ejs，

 <table class="table table-striped table-bordered" id="myTable"> <thead> <tr> <td>In Map</td> </tr> </thead> <tbody> <% for(var i=0; i < dbData.length; i++) { %> <tr> <td><a href="/onmap?<%= JSON.stringify(dbData[i]) %>" class="btn btn-info" role="button">Map</a></td> </tr> <% } %> </tbody> </table> 

mongoDb中的数据格式如下所示，

 { "_id": { "$oid": "58ad111590c50e1ca0c1f352" }, "deviceID": "group-6-GPS", "deviceTime": "04:41:37", "deviceDate": "2016/06/07", "receiveTime": "10:18:29", "receiveDate": "2017/02/22", "latitude": 17.08, "longitude": 15.07, "fix": 0, "satellites": 0, "altitude": null, "deviceSpeed": 0, "devicecourse": 0, "deviceVariation": null, "__v": 0 } 

点击地图button后，我得到这样的数据，

 { {"_id":"58ad111590c50e1ca0c1f352","deviceID":"group-6-GPS","deviceTime":"04:41:37","deviceDate":"2016/06/07","receiveTime":"10:18:29","receiveDate":"2017/02/22","latitude":"17.08","longitude":"15.07","fix":0,"satellites":0,"altitude":null,"deviceSpeed":0,"devicecourse":0,"deviceVariation":null,"__v":0}: "" } 

请注意上面两个数据格式不一样。

我需要从第二个数据访问经度和纬度 。 我怎样才能做到这一点？ 或者，我能做些什么来获得第二个数据为JSON？

Answer 1

如果你只是想在你的查询中提供纬度和长度，那么下面是提供url的代码

http://localhost:3000/onmap?latitude=17.08&longitude=15.07

并且parsing的查询将是{"latitude":"17.08","longitude":"15.07"}

 <table class="table table-striped table-bordered" id="myTable"> <thead> <tr> <td>In Map</td> </tr> </thead> <tbody> <% for(var i=0; i < dbData.length; i++) { %> <tr> <td><a href="/onmap?latitude=<%= dbData[i].latitude %>&longitude=<%= dbData[i].longitude %>" class="btn btn-info" role="button">Map</a></td> </tr> <% } %> </tbody> </table>