Javascript (MongoDB Atlas+;ExpressJS)如何使用路由将数据从一个.ejs文件发送到另一个文件,以便将数据加载到新网页上?

Javascript (MongoDB Atlas+;ExpressJS)如何使用路由将数据从一个.ejs文件发送到另一个文件,以便将数据加载到新网页上?,javascript,mongodb,express,ejs,mongodb-atlas,Javascript,Mongodb,Express,Ejs,Mongodb Atlas,我正在做一个项目,在这个项目中,我使用expressJS(和mongoose)在模拟大学招生系统的网站上读写MongoDB Atlas中的数据。我可以从给定集合中提取所有学生信息并将其显示在页面上,但我不能在页面之间发送信息。具体来说,我正在尝试将学生ID从所有学生档案(profiles.ejs)页面发送到学生详细信息(admisStudentView.ejs)页面,在该页面中我将只加载该人的信息。我能够接收正确学生的JSON,但我根本无法加载学生详细信息页面。当我尝试时,我得到一个错误:err

我正在做一个项目,在这个项目中,我使用expressJS(和mongoose)在模拟大学招生系统的网站上读写MongoDB Atlas中的数据。我可以从给定集合中提取所有学生信息并将其显示在页面上,但我不能在页面之间发送信息。具体来说,我正在尝试将学生ID从所有学生档案(profiles.ejs)页面发送到学生详细信息(admisStudentView.ejs)页面,在该页面中我将只加载该人的信息。我能够接收正确学生的JSON,但我根本无法加载学生详细信息页面。当我尝试时,我得到一个错误:error[ERR\u HTTP\u HEADERS\u SENT]:发送到客户端后无法设置头

/视图/profiles.ejs:
<!-- Currently this button is needed to load the student boxes, they do not display when the page first loads -->
<form action="/student/" method="get">
    <button  class="btn" type="submit">Refresh Applicant Pag</button>
</form>

<div class="database-tables">

    <table id="Students" class="table" border="1" >
        <% if(locals.student) {%>
            <% for(var i = 0; i < student.length; i++) {%>
                <td>
                    <div>
                        <center>
      
                            <footcaption>
                                <%= student[i].ApplicationStatus %><br>
                                <%= student[i].FirstName %>
                                <%= student[i].MiddleName %>
                                <%= student[i].LastName %><br>
                                <%= student[i]._id %><br>
                                <!-- In theory this button should load /views/admisStudentView with the relevent student's info-->
                                <form action="/student/detail" method="post">
                                    <button type="submit" name="_id" value="<%= student[i]._id %>">
                                        View Profile
                                        <input type="hidden" name="_id" value="<%= student[i]._id  %>" />
                                    </button>
                                </form>
                            </footcaption>
                        </center>   
                    </div>
                </td>
            <% } %>
        <% } %>
    </table>
</div>
<body>

<div class="content">
    <div class="container">
        <div class="row">
            <div class="col-5" id="boxstudent">
                <div class="row">
                    <div class="col" id="input">
                        <div class="row attribute" id="fname">
                            First Name:
                        </div>
                        ...
                    </div>
                    <div class="col-4" id="and">

                        <% if(locals.student_details) {%>
                            <div class="row attribute" id="fname">
                                 <%= student[i].FirstName %> 
                            </div>
                            ...
                        <% } %>

                    </div>
                </div>
            </div>
            
        </div>
    </div>
</div>
</body>
var express = require('express');

var router = express.Router();
const app = express();

app.set('view engine', 'ejs');

var Student = require('../schema/StudentSchema');

// Get all students & info in the DB
router.get('/', getStudents, render);

    function getStudents(req, res, next){
        Student.find({}, function (err, student) {
            console.log(student);
            console.log("Testing")
            res.locals.student = student;
            next();
        });
    };

    function render(req, res){
        res.render("../views/profiles.ejs");
    };



// Get info for a single student based on _id for admissions
router.post('/detail', getStudentDetails, renderAdmisStudentView);

    function getStudentDetails (req, res, next){
        Student.findOne({_id: req.body._id}, function(err, student_details){
            res.locals.student_details = student_details;
            console.log(student_details)
            res.send();
            next();
        });
    }

    function renderAdmisStudentView(req, res){
        res.render("../views/admisStudentView.ejs");
    }
module.exports = router;