我在弄清楚如何在mongodb中检索数据并将其提取到html / ejs文件中时遇到了麻烦。在html / ejs文件中,有一个按钮,如果用户单击该按钮,它将显示数据库集合mongodb中的所有数据。
我发现了一些与我的问题类似的问题,但没有回答我的问题。我对Node js和mongodb还是很陌生,所以我对如何实现目标没有真正的想法。
这是我的index.js
var express = require("express");
var app = express();
app.set('view engine', 'ejs')
//var hostname = '127.0.0.1';
var port = 3000;
var mongoose = require("mongoose");
app.set('view engine','jade');
mongoose.Promise = global.Promise;
mongoose.connect("mongodb://localhost:27017/commuters", {useNewUrlParser: true});
app.use('/gui', express.static('gui'));
//use to link static file in the folder named public
var nameSchema = new mongoose.Schema({
route : String,
origin : String,
destination : String,
estimatedTimeOfArrival : String,
date : String,
time : String
},
{
collection : 'boardingAlight'
});
//collection is the name of collection that you created in the same database name above
var User = mongoose.model("User", nameSchema);
var bodyParser = require('body-parser');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true, useNewUrlParser : true }));
app.use("/", (req, res) => {
res.sendFile(__dirname + "/gui/index.html");
});
//FOR PORT CONNECTION
//localhost:3000
app.listen(port, () => {
console.log("Server listening on port " + port);
});
使用按钮创建ejs文件后,需要在表中显示所有数据。谢谢!
答案 0 :(得分:2)
尝试以下代码:
app.js
var express = require("express"),
app = express(),
bodyparser = require("body-parser"),
mongoose = require("mongoose");
mongoose.connect("mongodb://localhost:27017/commuters", {useNewUrlParser: true});
app.use(bodyparser.urlencoded({ extended: true }));
app.set("view engine", "ejs");
var schema = new mongoose.Schema({
route : String,
origin : String,
destination : String,
estimatedTimeOfArrival : String,
date : String,
time : String
})
var detailsModel = mongoose.model("detailsModel", schema);
app.get("/", function (req, res) {
res.render("index",{ details: null })
})
app.get("/getdetails", function (req, res) {
detailsModel.find({}, function (err, allDetails) {
if (err) {
console.log(err);
} else {
res.render("index", { details: allDetails })
}
})
})
app.listen(3000, "localhost", function () {
console.log("server has started");
})
index.ejs
<div>
<a href="/getdetails">Get Details</a>
</div>
<hr>
<% if(details!=null) { %>
<table>
<tr>
<th>Route</th>
<th>origin </th>
<th>Destination</th>
<th>EstimatedTimeOfArrival </th>
<th>Date </th>
<th>Time</th>
</tr>
<% details.forEach(function(item){ %>
<tr>
<td><%= item.route%></td>
<td><%= item.origin %></td>
<td><%= item.destination%></td>
<td><%= item.estimatedTimeOfArrival %></td>
<td><%= item.date%></td>
<td><%= item.time%></td>
</tr>
<% }) %>
</table>
<% } %>
答案 1 :(得分:1)
如果要从db检索数据并将其发送到ejs,则可以这样操作:
app.get('/',(req,res,next) =>{
//Here fetch data using mongoose query like
User.find({}, function(err, users) {
if (err) throw err;
// object of all the users
res.render('index',{users:users});
});
在ejs文件上:
<!DOCTYPE html>
<html>
<head>
<title>Welcome to my blog</title>
</head>
<body>
<h1>Users</h1>
<p><%=users %></p>
</body>
</html>
在res.render
中发送对象的内容将在index.ejs文件上可用。现在,您可以根据需要显示数据