I am creating an 'edit profile' page for a dashboard the technologies that I use for the same are Next.js, Node.js & MongoDB.
Note: skip to the backend part if you just wanted to know the issue.
Frontend
Firstly,let me explain the Frontend part.
- I am using useRef() inorder to reference data(name,bio) in the inputfields. which are working nicely.
- Everything is fine the issue is in the
handlesbumit()event_handler.- I am using
FormDatato send my form data to the backend API - If you're thinking why I'm not using a usual body object to send data the reason is that I have to add the profile picture updation later for which I have to send files , which as far I know we can't do that with an Object and yeah just to inform you it works fine if I would have used that Object part but can't use it with profilepicture updation.
- The value that I have consoled out for the references are all good, and the rest of the handler is just as it is written can't find anything odd in that.
- I am using
import { useUser } from '../../../lib/hooks';
import React, { useState, useEffect, useRef } from 'react';
import Head from 'next/head';
import { ImBook, ImListNumbered } from 'react-icons/im';
import { AiFillGithub, AiOutlineTwitter, AiFillFacebook, AiFillInstagram, AiFillLinkedin } from 'react-icons/ai'
import { FaFacebook, FaStackOverflow } from 'react-icons/fa';
const ProfileSection = () => {
const [user, { mutate }] = useUser();
const [isUpdating, setIsUpdating] = useState(false);
const nameRef = useRef();
const profilePictureRef = useRef();
const bioRef = useRef();
const [msg, setMsg] = useState({ message: '', isError: false });
useEffect(() => {
nameRef.current.value = user.name;
bioRef.current.value = user.Bio;
}, [user]);
const handleSubmit = async (event) => {
event.preventDefault();
if (isUpdating) return;
setIsUpdating(true);
console.log(nameRef.current.value); //Testing
console.log(bioRef.current.value); //Testing
const formData = new FormData();
formData.append('name', nameRef.current.value);
formData.append('Bio', bioRef.current.value);
console.log(formData.get('name'));
const res = await fetch('/api/user', {
method: 'PATCH',
body: formData,
});
if (res.status === 200) {
const userData = await res.json();
mutate({
user: {
...user,
...userData.user,
},
});
setMsg({ message: 'Profile updated' });
} else {
setMsg({ message: await res.text(), isError: true });
}
};
return (
<>
<Head>
<title>Settings</title>
</Head>
<main>
<div class="row">
<div class="col s12 m12">
<div className="card-panel br-10">
{msg.message ? <p style={{ color: msg.isError ? 'red' : '#0070f3', textAlign: 'center' }}>{msg.message}</p> : null}
<form onSubmit={handleSubmit}>
<div className="row">
<div className="col s12 m6 l6">
<label htmlFor="name">
Name
<input
required
id="name"
name="name"
type="text"
ref={nameRef}
/>
</label>
</div>
<div className="col s12 m6 l6">
<label htmlFor="bio">
Bio
<textarea
id="bio"
name="bio"
type="text"
ref={bioRef}
/>
</label>
</div>
</div>
<div className="center-align">
<button disabled={isUpdating} className="btn" type="submit" >Save</button>
</div>
</form>
</div>
</div>
</div>
</main>
</>
);
};
const SettingPage = () => {
const [user] = useUser();
if (!user) {
return (
<>
<p>Please sign in</p>
</>
);
}
return (
<>
<ProfileSection />
</>
);
};
export default SettingPage;
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
import { useUser } from '../../../lib/hooks';
import React, { useState, useEffect, useRef } from 'react';
import Head from 'next/head';
import { ImBook, ImListNumbered } from 'react-icons/im';
import { AiFillGithub, AiOutlineTwitter, AiFillFacebook, AiFillInstagram, AiFillLinkedin } from 'react-icons/ai'
import { FaFacebook, FaStackOverflow } from 'react-icons/fa';
const ProfileSection = () => {
const [user, { mutate }] = useUser();
const [isUpdating, setIsUpdating] = useState(false);
const nameRef = useRef();
const profilePictureRef = useRef();
const bioRef = useRef();
const [msg, setMsg] = useState({ message: '', isError: false });
useEffect(() => {
nameRef.current.value = user.name;
bioRef.current.value = user.Bio;
}, [user]);
const handleSubmit = async (event) => {
event.preventDefault();
if (isUpdating) return;
setIsUpdating(true);
console.log(nameRef.current.value);
console.log(bioRef.current.value);
const formData = new FormData();
formData.append('name', nameRef.current.value);
formData.append('Bio', bioRef.current.value);
console.log(formData.get('name'));
const res = await fetch('/api/user', {
method: 'PATCH',
body: formData,
});
if (res.status === 200) {
const userData = await res.json();
mutate({
user: {
...user,
...userData.user,
},
});
setMsg({ message: 'Profile updated' });
} else {
setMsg({ message: await res.text(), isError: true });
}
};
return (
<>
<Head>
<title>Settings</title>
</Head>
<main>
<div class="row">
<div class="col s12 m12">
<div className="card-panel br-10">
{msg.message ? <p style={{ color: msg.isError ? 'red' : '#0070f3', textAlign: 'center' }}>{msg.message}</p> : null}
<form onSubmit={handleSubmit}>
<div className="row">
<div className="col s12 m6 l6">
<label htmlFor="name">
Name
<input
required
id="name"
name="name"
type="text"
ref={nameRef}
/>
</label>
</div>
<div className="col s12 m6 l6">
<label htmlFor="bio">
Bio
<textarea
id="bio"
name="bio"
type="text"
ref={bioRef}
/>
</label>
</div>
</div>
<div className="center-align">
<button disabled={isUpdating} className="btn" type="submit" >Save</button>
</div>
</form>
</div>
</div>
</div>
</main>
</>
);
};
const SettingPage = () => {
const [user] = useUser();
if (!user) {
return (
<>
<p>Please sign in</p>
</>
);
}
return (
<>
<ProfileSection />
</>
);
};
export default SettingPage;
Backend
Now, the backend API for the same handlesubmit() event_handler i.e. 'api/user'
- Please ignore the
handler, it's just a predefined middlewarenpm next-connectwhich itself checks what type of request is coming if its 'PATCH' it will runhandler.patch. - The Issue is the value of
name&Biois undefined,which means its not getting values from req.body; - And to check I also consoled out req.body which give out this

- The data is correct but
req.bodyis not a Object its aStringnow and I get it, its because I'm using formdata so how to get the values ofname&Biofrom this req.body ?
import nextConnect from 'next-connect';
import middleware from '../../../middlewares/middleware';
import { extractUser } from '../../../lib/api-helpers';
const handler = nextConnect();
handler.use(middleware);
handler.get(async (req, res) => res.json({ user: extractUser(req) }));
handler.patch(async (req, res) => {
if (!req.user) {
req.status(401).end();
return;
}
const { name, Bio } = req.body;
await req.db.collection('users').updateOne(
{ _id: req.user._id },
{
$set: {
name:name,
Bio: Bio,
},
},
);
res.json({ user: { name, Bio } });
});
export default handler;