I want to write a function with one param id for this mongo to pass to my home.ejs.
Example with this query:
db.getCollection('users').find('5da85558886aee13e4e7f044', {image: 1})
Example I have a route.
routes/users.js
var User = require("../models/user");var db = require("../secure/db");var middleware = require("../middlewares/middleware");//...router.get("/home", middleware.isAllowed, function(req, res, next) {res.render('home',{title: "Project",userList: userList,getUserimage: getUserimage(??)//trying here })});so in home.ejs or any file.ejsI can call like getUserimage('5da85558886aee13e4e7f044') inside loop of list of ids
views/home.ejs
<% layout('layout/layout') %>//more code<% for(var i=0; i < userList.length; i++){ %><div><img src ="<%=getUserimage(userList[i].id)%>" > <%=userList[i].name%> </div><% } %>//more codeHere is my updated helper
var User = require("../models/user");var ObjectId = require('mongodb').ObjectID;module.exports.getUserImage = async function getUserImage(id) {let result = await User.find(ObjectId(id), {image: 1, _id: 0}).lean();console.log(result[0].image);return result[0].image; //or whatever you wanna return };When I console.log it is gave me the correct result. but when I call in view.ejs like this <%=getUserImage("5d999578aeb073247de4bd6e")%> file it give me [object Promise]
Best Answer
Create a file , we name it helper.js.
module.exports.getUserimage = async function(id){//do something//replace this with your own code but use the awaitlet result = await collection.findOne(query);return result; //or whatever you wanna return }Then inside app.js you can do this
const helper = require("helper");app.locals.getUserimage = helper.getUserimageThen you can call it inside your .ejs template like the way you are doing.
<% layout('layout/layout') %>//more code<% for(var i=0; i < userList.length; i++){ %><div><img src ="<%= getUserimage(userList[i].id)%>" > <%=userList[i].name%> </div><% } %>//more codeapp.locals properties persist throughout the life of the application. Provide the complete path to the helper.js file. I have assumed that is in the same directory as the app.js file.