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File input always shows No file chosen

I'm building a form using React & Nodejs & MongoDB, where you can fill the form and upload a file with some other text inputs.
However, after i submit, i receive only text inputs in my database. The chosen file (desired to upload) doesn't appear at all in the database. I am expecting to get all the data form (the uploaded file and text inputed) in my database.
I tested my backend and it works correctly (it uploads all the inputs).
Ps: In browser, when i select a file (.pdf) to upload, the file input always shows no file chosen !
Console.dev : Error
{title: 'Miss', fname: 'zaezae', lname: 'zaeazee', email: 'zaea#mail.com', phoneNumber: '12345678', …}
coverLetter: "zaez e az ezae e zae aeae "
cv: ""
email: "zaea#mail.com"
fname: "zaezae"
lname: "zaeazee"
myFile: "C:\\fakepath\\test.pdf"
phoneNumber: "12345678"
title: "Miss"
Formulaire.jsx:29
Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'then')
at submit (Formulaire.jsx:29:1)
Backend:
server.js:
const express = require('express')
const mongoose = require('mongoose')
const bodyparser = require('body-parser')
const FormRoute = require('./routes/FormRoute')
//database
mongoose.connect('mongodb://localhost:27017/form', { useNewUrlParser: true, useUnifiedTopology: true })
const db = mongoose.connection
db.on('error', (err) => {
console.log(err)
})
db.once('open', () => {
console.log("Database connection established!")
})
//app
const app = express()
app.use(bodyparser.urlencoded({ extended: true }))
app.use(bodyparser.json())
//cors
const cors = require('cors')
app.use(cors())
//server run
const PORT = process.env.PORT || 5000
app.listen(PORT, () => {
console.log(`Server is running on port ${PORT}`);
})
app.use('/api/form', FormRoute);
Axios.js:
import axios from 'axios'
export const Axios = axios.create({
baseURL: 'http://localhost:5000',
})
Apiroutes.js:
const form = "/api/form"
export const requests = {
formApi: {
store: form + '/store'
}
}
formservices.js:
import { Axios } from "../config/axios";
import { requests } from "../config/apiroutes";
export const FormService = {
store: (data) => {
Axios.post(requests.formApi.store, data)
.then(res => {
return res
})
.catch(err => {
return err
})
}
}
formController.js :
const form = require('../models/FormModel')
const store = (req, res, next) => {
let candidate = new form({
title: req.body.title,
fname: req.body.fname,
lname: req.body.lname,
email: req.body.email,
phoneNumber: req.body.phoneNumber,
coverLetter: req.body.coverLetter
})
if (req.file) {
candidate.cv = req.file.path
}
candidate.save()
.then(response => {
res.json({
success: true,
message: 'Candidate added successfully!',
data: candidate,
})
})
.catch(error => {
res.json({
success: false,
message: 'An error occured!',
error: error,
})
})
}
module.exports = {
store
}
Frontend:
Formulaire.jsx :
import React, { useState } from 'react'
import Divider from '#mui/material/Divider';
import './Formulaire.css'
import { titles } from '../../mock/titles'
import { FormService } from '../../services/formServices';
const Form = () => {
const [storedata, setstoredata] = useState({
title: '',
fname: '',
lname: '',
email: '',
phoneNumber: '',
cv: '',
coverLetter: ''
})
const handleChange = e => {
const { name, value } = e.target;
setstoredata(prevState => ({
...prevState,
[name]: value
}));
};
const submit = async () => {
console.log(storedata);
await FormService.store(storedata)
.then(res => {
console.log(res);
})
.catch(err => {
return err
})
}
return (
<div className='container'>
<div className='header'>
<div className='title'>
<a className='quizbutton' href="/quiz">Take a Test (Quiz)</a>
<h1>Apply for a Position :</h1>
</div>
</div>
<Divider style={{ maxWidth: '1000px', marginLeft: '250px' }} />
<div id="content">
<div id="formWrapper">
<form id="msform" method='post' action='/uploadFile' enctype="multipart/form-data">
<fieldset id="fieldset3">
<h2 class="fs-title">Please complete the form below for a position with us.</h2>
<h3 class="fs-subtitle">Reference 0001</h3>
{/* <div class="fs-error"></div> */}
<div class="wrapper">
<label for="title">Title :</label>
<select name="title" value={storedata.title} onChange={handleChange}>
<option hidden></option>
{
titles.map((c, i) => {
return (
<option key={i} value={c}>{c}</option>
)
})
}
</select>
<label for="fname">First Name<span>*</span> :</label>
<input type="text" name="fname" value={storedata.fname} onChange={handleChange} id="fname" placeholder="Please enter your first name" required />
<label for="lname">Last Name<span>*</span> :</label>
<input type="text" name="lname" value={storedata.lname} onChange={handleChange} id="lname" placeholder="Please enter your last name" required />
<label for="email">Email<span>*</span> :</label>
<input type="email" name="email" value={storedata.email} onChange={handleChange} id="email" placeholder="Please enter your email" required />
<label for="phoneNumber">Phone N° :</label>
<input type="number" name="phoneNumber" value={storedata.phoneNumber} onChange={handleChange} id="phoneNumber" placeholder="Phone number" />
<label for="CV">Upload CV <span>*</span>:</label>
<input type="file" name="myFile" id="cv" value={storedata.cv} onChange={handleChange} accept="application/msword, application/pdf" placeholder="Cover Letter" required />
<label for="coverLetter">Cover Letter :</label>
<textarea type="text" name="coverLetter" value={storedata.coverLetter} onChange={handleChange} id="coverLetter" placeholder="cover Letter" />
</div>
<br />
<input type="submit" name="submit" class="submit action-button" value="Submit" onClick={submit} />
</fieldset>
</form>
</div>
</div>
</div>
)
}
export default Form

I fixed my problem by changing name="myFile" id="cv" to name="cv" id="cv"

How do I add user inputs on click?

Self taught coder. Hopefully I can explain this adequately. Users create recipe cooking guides by inputing values like dish name, food category, cover img, etc. The steps array only has 1 step at the moment. I want a button that users can click that would add another "step" and "gif" to the steps array. Can anyone suggest a method to have another set of "step" and "img" render on screen when the user clicks the Add Step button? I have a handleAddSteps function with nothing inside. Somebody recommended using DOM? Just want to know if this is a good way to go before investing time down the wrong rabbit hole. Thank you kindly for any advice.
import React from "react";
import { useState, useEffect } from "react";
// Styles
import "./UploadGuide.scss";
// Firebase
import { doc, setDoc } from "firebase/firestore";
import { db, storage } from "../../firebase";
import { v4 as uuidv4 } from "uuid";
import { ref, uploadBytesResumable, getDownloadURL } from "firebase/storage";
function UploadGuide() {
const [file, setFile] = useState("");
const [data, setData] = useState({});
const [percentage, setPercentage] = useState(null);
// const [stepsCounter, setStepsCounter] = useState(0);
// Upload IMG
useEffect(() => {
const uploadFile = () => {
const name = new Date().getTime() + file.name;
const storageRef = ref(storage, file.name);
const uploadTask = uploadBytesResumable(storageRef, file);
uploadTask.on(
"state_changed",
(snapshot) => {
const progress =
(snapshot.bytesTransferred / snapshot.totalBytes) * 100;
console.log("Upload is " + progress + "% done");
setPercentage(progress);
switch (snapshot.state) {
case "paused":
console.log("Upload is paused");
break;
case "running":
console.log("Upload is running");
break;
default:
break;
}
},
(error) => {
console.log(error);
},
() => {
// Handle successful uploads on complete
getDownloadURL(uploadTask.snapshot.ref).then((downloadURL) => {
setData((prev) => ({ ...prev, img: downloadURL }));
});
}
);
};
file && uploadFile();
}, [file]);
console.log(file);
console.log(data);
// When user clicks Add Steps button, page renders another steps card
const handleAddSteps = () => {};
// When user submits guide, upload data to firecloud db and imgs to firebase storage.
const handleAddGuide = async (e) => {
e.preventDefault();
const newId = uuidv4();
// const stepsArray = []
await setDoc(doc(db, "guides", newId), {
author: e.target.author.value,
categoryId: "100",
categoryName: e.target.categoryName.value,
coverGif: data.img,
id: newId,
name: e.target.name.value,
tags: e.target.tags.value,
// steps: stepsArray
steps: [
{
step: e.target.step.value,
gif: data.img,
},
],
});
};
return (
<div className="upload">
<form onSubmit={handleAddGuide} className="upload__form">
<div className="upload__card">
<div className="upload__inputs">
<label className="upload__label">Guide Name</label>
<input
className="upload__input"
placeholder="Name of your recipe"
type="name"
name="name"
// value=""
></input>
</div>
<div className="upload__inputs">
<label className="upload__label">Author</label>
<input
className="upload__input"
type="author"
name="author"
></input>
</div>
<div className="upload__inputs">
<label className="upload__label">Category</label>
<select
name="categoryName"
className="upload__input"
defaultValue={"Cooking"}
>
<option value="Cooking">Cooking</option>
<option></option>
</select>
</div>
<div className="upload__inputs">
<label className="upload__label">Tags</label>
<input
name="tags"
className="upload__input upload__input--large"
placeholder="Add relevant tags to help people find your guide"
></input>
</div>
</div>
<div className="upload__card upload__card--addstep">
<div className="upload__inputs">
<label className="upload__label">Step 1</label>
<input
className="upload__input upload__input--large"
name="step"
></input>
</div>
<div className="upload__inputs">
<div>
<img src={file ? URL.createObjectURL(file) : ""}></img>
</div>
<label
htmlFor="file"
style={{ cursor: "pointer" }}
className="upload__add"
>
+ IMG
</label>
<input
id="file"
onChange={(e) => setFile(e.target.files[0])}
style={{ display: "none" }}
type="file"
></input>
</div>
</div>
<div className="upload__box">
<button
className="upload__add"
onClick={handleAddSteps}
style={{ cursor: "pointer" }}
>
Add Step
</button>
</div>
<div className="upload__cta">
<button
disabled={percentage !== null && percentage < 100}
type="submit"
className="upload__submit"
style={{ cursor: "pointer" }}
>
Upload
</button>
</div>
</form>
</div>
);
}
export default UploadGuide;
Here is an image of what the page looks like:
enter image description here
Please let me know if I'm missing any key information. Any advice is appreciated. Thank you.

Since each Guide can have multiple steps, I would rather create a state that handles an array of multiple step objects, than just a counter.
With this, you can render as much steps as you have in the array.
Then, adding steps just will be a matter of adding objects (with an empty state) to that array.
I made this functional example, that should be clear enough to show what I mean:
import React, { useState } from 'react';
const EMPTY_STEP = { text: '', file: null };
export default function App() {
const [guideSteps, setGuideSteps] = useState([{ ...EMPTY_STEP }]);
const handleStepChange = (stepIndex, property, value) => {
setGuideSteps((prevState) => {
const newGuideSteps = [...prevState];
newGuideSteps[stepIndex] = { ...newGuideSteps[stepIndex], [property]: value };
return newGuideSteps;
});
};
const handleAddStep = () => {
setGuideSteps((prevState) => [...prevState, { ...EMPTY_STEP }]);
};
return (
<div className="Steps">
{guideSteps.map((step, index) => {
return (
<div key={`step-${index + 1}`}>
<h2>{`Step ${index + 1}`}</h2>
<input type="text" value={step.text} onChange={(e) => handleStepChange(index, 'text', e.target.files ? e.target.files[0] : null, index)} />
<input type="file" value={step.file} onChange={(e) => handleStepChange(index, 'file', e.target.value, index)} />
</div>
);
})}
<button onClick={handleAddStep}>Add Step</button>
</div>
);
}

PUT request from redux actions not working

I am trying to update my MongoDB database containing data for a project information form through a PUT request on my action, but I am unable to get the handleSumbit function on my component to call my project action. I am receiving a 404 error. I have no clue what I am missing or have done wrong. Any insight would be appreciated.
My Component:
import React, { useState } from 'react'
import { connect } from 'react-redux'
import { Link } from 'react-router-dom'
import '../styles/ViewProject.css'
import { updateProjects } from '../actions/project.actions'
const EditProject = ({ project, match }) => {
const [name, setName] = useState('')
const [email, setEmail] = useState('')
const [projectName, setProjectName] = useState('')
const [projectType, setProjectType] = useState('')
const [multiple, setMultiple] = useState(false)
const [dueDate, setDueDate] = useState(Date)
const [url, setUrl] = useState('')
const [description, setDescription] = useState('')
const handleSubmit = e => {
e.preventDefault()
updateProjects(name, email, projectName, projectType, dueDate, url, description)
console.log('Data ', name, email, projectName)
}
return(
<form className="viewProjectContainer" onSubmit={handleSubmit}>
{project.map((task, i) => (
<div key={i++} >
{match.params.id === task._id ?
<div className="vp">
<div className="vpLeft">
<div className="vpTitle">
<input className='vpProjectName' defaultValue={task.projectName} onChange={e => setProjectName(e.target.value)} />
</div>
<div className="vpSub">
<p>Submitted by: </p>
<label>Name: </label>
<input className='vpName' defaultValue={task.name} onChange={e => setName(e.target.value)}/>
<label>Email: </label>
<input className='vpEmail' defaultValue={email} onChange={e => setEmail(e.target.value)}/>
</div>
<div className="vpDescription">
<label>{task.multiple === true ? "(Multiple)" : "Single"}</label>
<p>Project Type: </p>
<select className='formInput' onChange={e => setProjectType(e.target.value)} defaultValue={projectType}>
<optgroup label='Digital'>
<option value='banner'>Banner</option>
<option value='emailBlast'>Email Blast</option>
<option value='productImage'>Product Image</option>
<option value='socialMediaAd'>Social Media Ad</option>
<option value='video'>Video</option>
<option value='websiteMockup'>Website Mockup</option>
<option value='other'>Other (Please be specific in Description)</option>
</optgroup>
<optgroup label='Physical Product'>
<option value='bottleOpener'>Bottle Opener</option>
<option value='clothing'>Clothing</option>
<option value='keyChain'>Key Chain</option>
<option value='popSocket'>Pop Socket</option>
<option value='usb'>USB</option>
<option value='other'>Other (Please be specific in Description)</option>
</optgroup>
<optgroup label='Print'>
<option value='businessCard'>Business Card</option>
<option value='brochureBiFold'>Brochure - Bi-fold</option>
<option value='brochureTriSquare'>Brochure - Trifold Square</option>
<option value='brochureTriStandard'>Brochure - Trifold Standard</option>
<option value='catalogMore'>Catalog - Less than 50 pages</option>
<option value='catalogLess'>Catalog - More than 50 pages</option>
<option value='documentFull'>Document - Full Sheet</option>
<option value='documentHalf'>Document - Half Sheet</option>
<option value='flyer4x6'>Flyer - 4x6</option>
<option value='flyer5x7'>Flyer - 5x7</option>
<option value='flyer6x9'>Flyer - 6x9</option>
<option value='postCard4x6'>Post Card 4x6</option>
<option value='postCard5x7'>Post Card 5x7</option>
<option value='postCard6x9'>Post Card 6x9</option>
<option value='poster11x17'>Poster 11x17</option>
<option value='poster24x36'>Poster 24x36</option>
<option value='other'>Other (Please be specific in Description)</option>
</optgroup>
<optgroup label='Other'>
<option value='consultation'>Consultation</option>
<option value='labeling'>Labeling</option>
<option value='other'>Other (Please be specific in Description)</option>
</optgroup>
</select>
<div className="vpDescBox">
<textarea className='updateDescription' defaultValue={description} onChange={e => setDescription(e.target.value)}></textarea>
</div>
</div>
</div>
<div className="vpRight">
<div className="vpTicket">
<p>Ticket Number: {task.ticketNumber}</p>
<label>Submitted: {task.date} </label>
<label>Preferred due date: </label>
<input type='date' defaultValue={task.dueDate} onChange={e => setDueDate(e.target.value)}/>
</div>
<div>
<label>Reference links: </label>
<input type='text' defaultValue={task.url} onChange={e => setUrl(e.target.value)}/>
<label></label>
</div>
<div>
<p>Project Status:</p>
<p>Task Recieved: {task.recieved === true ? "Recieved" : "Not Revieved"}</p>
<p>Task in progress: {task.inProgress === true ? "In Progress" : "Not in Progress"}</p>
<p>Completed: {task.completed === true ? "Complete" : "Incomplete"}</p>
</div>
</div>
</div>: null}
</div>
))}
<div className='buttonsContainer'>
<button type='submit' className='projectViewButton1'><Link to={'/' + match.params.id}>Save</Link></button>
</div>
</form>
)
}
const mapStateToProps = state => ({
project: state.projects.project,
id: state.projects.id
})
export default connect(
mapStateToProps,
{ updateProjects }
)(EditProject)
My action:
export function updateProjects(name, email, projectName, projectType, dueDate, url, description) {
console.log('reducer ', name)
axios.put('api/projects/update/:id', {
name: name,
email: email,
projectName: projectName,
projectType: projectType,
// multiple: multiple,
dueDate: dueDate,
url: url,
description: description
}).then(resp => {
console.log("Data updated: ", resp.data)
})
}
My Backend:
// #route PUT api/projects/update/:id
// #desc Update projects
// #access Private
router.put('/update/:id', async (req, res) => {
try {
const {
name,
email,
projectName,
projectType,
multiple,
dueDate,
reference,
attachment,
description,
ticketNumber,
received,
inProgress,
completed
} = req.body
const project = await Project.findByIdAndUpdate(req.params.id, {
name,
email,
projectName,
projectType,
multiple,
dueDate,
reference,
attachment,
description,
ticketNumber,
received,
inProgress,
completed
})
res.json(project);
} catch (err) {
console.error(err.message)
res.status(500).send('Server Error')
}
})
Thank you for helping!

The endpoint you are hitting with the axios.put is api/projects/update/:id, which is incomplete. You should put your host as well. For example: http://localhost:8000/api/projects/update/:id
And also, you need to specify a proper value for :id in the URL. Not sure if you left that out in purpose for example's sake but just wanna point that one out too haha.

in your react project folder's package.json file :
"proxy":"http://localhost:8000"
your http url should be below :
axios.put('/api/projects/update/', {
params: {
id: 'value of id'
}
});
or :
axios.put(`/api/projects/update/${value of id}`)

Updating React Json Value Conditionally

I didn't figure out how to edit JSON data from a Put request.(it must be PUT request)
I created some inputs as you see and I need to find a way for updating/adding new credit-debit datas on JSON data differs by "to" and "from".
Also, if a "to" value added, it must decreased from total balance and if a "from" value added, it must be added to total balance.
I created a select box and an input for this (didin't connect between json and component)
My Updater component is as follows:
Component itself:
import React, { Component } from 'react';
import './Updater.scss';
import Axios from 'axios';
export default class Updater extends Component {
constructor(){
super();
this.state = {
amount: '',
description: '',
from: '',
to: '',
date: new Date()
}
}
onSubmitEdit = () => {
Axios.put('http://localhost:8080/api/balance/add',
{});
}
render() {
return (
<div className="updatercontainer">
<div className="updaterinputs">
<input className="amount" name="amount"
type="text" placeholder="Enter Amount"/>
<input className="description" name="description"
type="text" placeholder="Enter Description"/>
</div>
<div className="selectbox">
<select>
<option value="From">From</option>
<option value="To">To</option>
</select>
<input className="fromto" type="text"
name="fromto" placeholder="Enter From or To Name"/>
</div>
<div className="selectboxcontainer">
<div className="button-container">
<a href="#" onClick={this.onSubmitEdit}
className="button amount-submit">
<span></span>Update</a>
</div>
</div>
</div>
)
}
}

class Updater extends React.Component {
constructor() {
super();
this.state = {
amount: 0,
description: "",
_from: true,
_to: false,
date: new Date()
};
}
onAmountChange = e => {
this.setState({
amount: e.target.value
});
};
onDescriptionChange = e => {
this.setState({
description: e.target.value
});
};
onSelectTypeChange = e => {
console.log(e.target.value);
this.setState({
[e.target.value === "from" ? "_from" : "_to"]: true,
[e.target.value !== "from" ? "_from" : "_to"]: false
});
if(e.target.value !== "from" && (this.state.from != null || this.state.from !== "")) {
this.setState({
to: this.state.from,
from: null
});
} else if(e.target.value === "from" && (this.state.to != null || this.state.to !== "")){
this.setState({
from: this.state.to,
to: null
});
}
};
onFromToChange = (e) => {
this.setState({
[this.state._from ? "from" : "to"]: e.target.value
});
}
onSubmitEdit = () => {
Axios.put(
"https://httpbin.org/put",
{
...this.state,
},
{ headers: { "Content-Type": "application/json" } }
)
.then(response => {
// handle Response
})
.catch(err => {
// handle Error
});
};
render() {
return (
<div className="updatercontainer">
<div className="updaterinputs">
<input
onChange={this.onAmountChange}
className="amount"
name="amount"
type="text"
placeholder="Enter Amount"
/>
<input
onChange={this.onDescriptionChange}
className="description"
name="description"
type="text"
placeholder="Enter Description"
/>
</div>
<div className="selectbox">
<select onChange={this.onSelectTypeChange}>
<option value="from">From</option>
<option value="to">To</option>
</select>
<input onChange={this.onFromToChange} className="fromto" type="text"
name="fromto" placeholder="Enter From or To Name"/>
</div>
<div className="selectboxcontainer">
<div onClick={this.onSubmitEdit} className="button-container">
<a href="#" className="button amount-submit">
<span>Update</span>
</a>
</div>
</div>
</div>
);
}
}
Consider Reading More About Handling Inputs, Forms, Events
Working Sandbox!

you just need an onChange event to update the state based on the input values name
handleChange = (e) => {
this.setState({ [e.target.name]: e.target.value })
}
//On your inputs
<input
className="amount"
name="amount"
type="text"
placeholder="Enter Amount"
value={this.state.amount}
onChange={() => this.handleChange(e)}
/>

How can I get this dynamic form to work?

I have been trying to get my dynamic form to work in my Meteor React application.
It was all working as requested before I started add this but now I can't get it to work. I'm getting a "Uncaught TypeError: Cannot set property '0' of undefined" error. this points to this line:
{this.state.inputs.map((input, idx) => <input
This my whole code, I know it's a bit messy so any feedback is highly appreciated:
import React, { Component } from 'react';
import { Row, Col, Checkbox, Radio, ControlLabel, HelpBlock, FormGroup, FormControl, Button, Tabs, Tab } from 'react-bootstrap';
import { Bert } from 'meteor/themeteorchef:bert';
import { insertComment } from '../../../api/comments/methods';
import ReactQuill from 'react-quill';
var s3Url = null;
export default class AddSparkShanghai extends Component {
constructor(props) {
super(props);
this.createSpark = this.createSpark.bind(this);
this.onChange = this.onChange.bind(this);
this.state ={
inputs: ['input-0'],
city: '',
person: '',
location: '',
title: '',
content: [],
mediaUrls: [],
};
}
componentWillMount(){
// we create this rule both on client and server
Slingshot.fileRestrictions("myFileUploads", {
allowedFileTypes: ["image/png", "image/jpeg", "image/gif"],
maxSize: 10 * 1024 * 1024 // 10 MB (use null for unlimited)
});
}
upload(file){
var uploader = new Slingshot.Upload("myFileUploads");
uploader.send(document.getElementById('input').files[0], function (error, downloadUrl) {
if (error) {
// Log service detailed response
alert (error);
}
else {
s3Url = encodeURI(downloadUrl);
Bert.alert('File uploaded!', 'success');
Meteor.users.update(Meteor.userId(), {$push: {"profile.files": downloadUrl}});
}
});
}
createSpark(event) {
event.preventDefault();
var formData = $('#form').serializeArray()
console.log(formData);
var mediaArray = [];
if (this.mediaUrls.value == 0) {
mediaArray = [];
} else {
mediaArray.push(encodeURI(this.mediaUrls.value));
console.log(this.mediaUrl.value);
console.log(mediaArray);
}
const city = 'Shanghai';
const person = this.person.value;
const location = this.location.value;
const title = this.title.value;
const content = this.state.content;
const fileLink = s3Url;
const timestamp = parseInt(this.props.timestamp);
const mediaUrls = mediaArray;
const approved = true;
const adminSpark = true;
const createdBy = Meteor.userId();
insertComment.call({
city, person, location, title, content, fileLink, timestamp, approved, adminSpark, createdBy, mediaUrl,
}, (error) => {
if (error) {
Bert.alert(error.reason, 'danger');
} else {
Bert.alert('Spark added!', 'success');
}
});
}
onChange(html) {
this.setState ({ content: html });
}
appendInput() {
var newInput = `input-${this.state.inputs.length}`;
console.log (newInput);
this.setState({ inputs: this.state.inputs.concat([newInput]) });
}
render() {
const events = {
'text-change': delta => {
}
}
return (
<div className="background-container">
<form ref={(input) => this.sparkForm = input} onSubmit={(e) => this.createSpark(e)}>
<ControlLabel>Select your person (optional)</ControlLabel>
<select id="formControlsPerson" placeholder="Choose your person" className="form-control" ref={(input) => this.person = input}>
<option value='select'>Select your person</option>
<option value='jane'>Jane Siesta</option>
<option value='ben'>Ben Huang</option>
<option value='han'>Han Han</option>
<option value='mau'>Mau Mau</option>
<option value='void'>VOID</option>
<option value='tommy'>Tommy Hendriks</option>
<option value='gareth'>Gareth Williams</option>
<option value='gigi'>Gigi Lee</option>
</select>
<ControlLabel>Select your location (optional)</ControlLabel>
<select id="formControlsLocation" placeholder="Choose your location" className="form-control" ref={(input) => this.location = input}>
<option value='select'>Select your location</option>
<option value='shelter'>Shelter</option>
<option value='mansion'>The Mansion</option>
</select>
<ControlLabel>Title</ControlLabel>
<input type="text" label="Title" placeholder="Enter your title" className="form-control" ref={(input) => this.title = input}/>
<ControlLabel>Add Image</ControlLabel>
<div className="upload-area">
<p className="alert alert-success text-center">
<span>Click or Drag an Image Here to Upload</span>
<input type="file" id="input" className="file_bag" onChange={this.upload} />
</p>
</div>
<ControlLabel>Content</ControlLabel>
<div className='_quill'>
<ReactQuill
toolbar={false}
theme="snow"
ref='editor'
onChange={this.onChange}
events={events} />
</div>
<br />
<ControlLabel>Media (optional)</ControlLabel>
<div id="dynamicInput">
{this.state.inputs.map((input, idx) => <input
key={ input }
type="text"
label="Media"
placeholder="Add your media url"
className="form-control"
ref={(input) => this.mediaUrls[idx] = input}/> )}
</div>
<Button onClick={ () => this.appendInput() }>
Add media field
</Button>
<ControlLabel>Media (optional)</ControlLabel>
<div id="dynamicInput">
{this.state.inputs.map(input => <input key={input} type="text" label="Media" placeholder="Add your media url" className="form-control" ref={(input) => this.mediaUrl = input}/> )}
</div>
<Button onClick={ () => this.appendInput() }>
Add media field
</Button>
<Button type="submit" data-dismiss="modal">Submit</Button>
</form>
</div>
)}
}

I guess the problem is this line: ref={(input) => this.mediaUrls[idx] = input}/> )}, it seems like the value of this.mediaUrls is undefined