Unable to create or edit new Post (Node & Mongo) - node.js

Question

I already solved the problem but now IT is back. I want to save new artist to the website or edit them but now its like the application doesnt connect to the DB but it is! I checked.
const
express = require('express'),
router = express.Router(),
Post = require('../models/post');
// Define which ImageTypes are avaiable to upload
const imageMimeTypes = ['image/jpeg', 'image/png', 'image/gif', 'image/jpg'];
// All admin Routes
router.get('/', async (req, res) => {
renderNewPage(res, new Post())
})
// New Route
router.get('/create', (req, res) => {
res.render('admin/createPost/index', {
layout: 'layouts/admin',
// Defined in models/post, gets variables
post: new Post()
});
})
// New Post create
router.post('/', async (req, res) => {
const post = new Post({
// get information from sended new Post (above) and defines variables to use in ejs files
surname: req.body.surname,
name: req.body.name,
bio: req.body.bio,
birthday: req.body.birthday,
technic: req.body.technic,
techPricerangeFrom: req.body.techPricerangeFrom,
techPricerangeTo: req.body.techPricerangeTo
})
// set FilePond saving files to DB
saveProfilpic(post, req.body.profilpic)
try { // await for new post to safe
const newPost = await post.save();
res.redirect('admin');
} catch {
renderNewPage(res, post, true)
}
})
//? Singe Artist Show, Edit, Upate, Delete
// Create single artists page
router.get('/:id', (req, res) => {
res.send('Show Artist' + req.params.id)
})
// Edit artist
router.get('/:id/edit', async (req, res) => {
try {
const findPost = await Post.findById(req.params.id)
res.render('admin/edit', {
layout: 'layouts/admin',
post: findPost
})
} catch {
res.redirect('/admin')
}
})
// Update artist text
router.put('/:id', async (req, res) => {
let post;
try {
post = await Post.findById(req.params.id)
post.surname = req.body.surname,
post.name = req.body.name,
post.bio = req.body.bio,
post.birthday = req.body.birthday,
post.technic = req.body.technic,
post.techPricerangeFrom = req.body.techPricerangeFrom,
post.techPricerangeTo = req.body.techPricerangeTo,
post.profilpic = req.body.profilpic
await post.save();
res.redirect(`/admin`);
} catch {
if (post == null) {
res.redirect('/admin')
}
else {
res.render('admin/edit', {
layout: 'layouts/admin',
post: post,
})
}
}
})
// Define functions
async function renderNewPage(res, post, hasError = false) {
// Implement all Posts (artists) in the DB
try {
const posts = await Post.find({}).collation({ locale: 'en', strength: 2 }).sort({ name: 1 }) // wait and find all post and sort my name
const params = {
layout: 'layouts/admin',
posts: posts, // take all posts from await Post.find({}) and overrides the updates the posts
}
if (hasError) params.errorMessage = 'Ein Fehler ist aufgetreten'
res.render('admin/index', params);
} catch (err) {
res.redirect('/');
}
}
// func for dave files via filepond
function saveProfilpic(post, profilpictureEncoded) {
if (profilpictureEncoded == null) return
const profpic = JSON.parse(profilpictureEncoded);
if (profpic != null && imageMimeTypes.includes(profpic.type)) { // If the file is a json obj & from the type image (jpg, png)
post.profilpic = new Buffer.from(profpic.data, 'base64') // Buffer.from(where, how)
post.profilpicType = profpic.type
}
}
module.exports = router;
all types in the model/post file are Strings.If I want to change something it redirects me to /admin, what means its a error. I got all latest packages (express, mongoose, ...)

Answer 1

I found your answer as I was working on the same tutorial, so I'm still quite new to this, but in my case the problem was related to having a missing '=' in the index page view.
Do you have the '=' character within the <% %> part so that the id is actually included in the link? If not, the link won't include the actual id, since the '=' is needed to not just access a variable but also display it.
<% artists.forEach(Artist=> { %>
<div><%= Artist.last_name %></div>
View
<% }) %>
Hope this helps, and feel free to correct me, as I'm also just starting to learn the basics.