Don't GET req.query.name to collection.find in express and MongoDB
Question
I use a mongodb database where I have its internal log data. With Express, Node and Monk (following this guide) I have to try to get data from a search text box, and I stopped on how to request this data.
from the userlist.ejs page I have implemented a form where I send a GET request:
http://localhost:3000/userlist?name=5044
where then I go to get name through
search = req.query.name
and then insert it into the collection.find({search}.....
below is the index.js:
/* GET Userlist page. */
router.get('/userlist', function(req, res) {
search = req.query.name;
var db = req.db;
var collection = db.get('startup_log');
collection.find({search},{},function(e,docs){
res.render('userlist', {
"userlist" : docs
});
});
});
this is the userlist.ejs page where I send the request. which later should display it through the for loop after processing it from index.ejs,
<!DOCTYPE html>
<html>
<head>
<title>User List</title>
<link rel='stylesheet' href='/stylesheets/style.css' />
</head>
<body>
<h1>User List</h1>
<input type="text" id="titles" />
<form action="/userlist" method="GET" encType="multipart/form-data">
<label htmlFor="newNote">New Note:</label>
<input type="text" name="name" className="form-control" rows="5"
id="name" placeholder="5044"></input>
<button id="done" type="submit" className="btn btn-primary pull-
right">Done</button>
<button id="cancel" className="btn btn-warning pull-
right">Cancel</button>
</form>
<ul>
<% for (var i = 0; i < userlist.length; i++) {%>
<li><%= userlist[i].hostname %></li>
<li></li>
<%}%>
</ul>
</body>
</html>
i can't figure out how to pass to collection.find the query i enter in the text box. any help would be appreciated as I cannot find specific information about my case. Thanks in advance!
UPDATE
I can say that I have tried them all, I am about to give up, I also tried with an if else, I tried to change the field, but nothing, it does not take the damn
let query = req.query.name;
from:
http://localhost:3000/search?name=5044
the funny thing is that it works perfectly well in this way:
router.get('/search', async (req, res)=> {
if (!req.query.name)
return res.render("search", {
title: "NodeMongo Search",
userlist:[],
});
else {
const url = 'localhost:27017/local'; // Connection URL
const db = require('monk')(url);
const collection = db.get('startup_log')
try{
let query = 5044; //assigning the pid directly to the variable query
const userlist = await collection.find({pid:query});
res.render("search",{userlist});
}catch(e){
console.log(e);
}}
});
so assigning 5044 to the query variable run perfectly, but:
router.get('/search', async (req, res)=> {
if (!req.query.name)
return res.render("search", {
title: "NodeMongo Search",
userlist:[],
});
else {
const url = 'localhost:27017/local'; // Connection URL
const db = require('monk')(url);
const collection = db.get('startup_log')
try{
let query = req.query.name;
const userlist = await collection.find({pid:query});
res.render("search",{userlist});
}catch(e){
console.log(e);
}}
});
assigning the query req.query.name NO
2 answers
solution1
0 2021-03-01 16:13:49
It looks like everything is done correctly, except for the actual MongoDB query. {search} expands to {search: search} so it will search inside a field called search in your database and I'm assuming no such field exists.
You can read about the correct MongoDB query syntax here: https://docs.mongodb.com/manual/tutorial/query-documents/
For example, to return only documents where the field email would equal your search query, you'd use {email: search} . I can't give you an exact solution for your case though because you didn't show the structure of your database documents.
solution2
0 2021-03-07 20:46:38
For those interested in the solution, it is that req.query only passes strings, so I solved it in this way;
var query = (+req.query.name);
Other ideas would be well accepted !
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