Hi everyone,
So I have been trying to make the form in my application dynamic but am failing to retrieve the data from the input. Eventhough the code is messy (it’s my first meteor react project), I would like to learn how to get it working.
Any feedback is highly appreciated.
Before Adding the dynamic part it was all working as requested. The only problem I had is that the form was not returning all the values of the dynamic input. I now try to map over it but am getting a :
“Uncaught TypeError: Cannot set property ‘0’ of undefined” error which refers to this line:
"{this.state.inputs.map((input, idx) => <input".
How can I fix this?
This is my code:
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(), {$push: {"profile.files": downloadUrl}});
}
});
}
createSpark(event) {
event.preventDefault();
var mediaArray = [];
if (this.mediaUrls.value == 0) {
mediaArray = [];
} else {
mediaArray.push(encodeURI(this.mediaUrls.value));
console.log(this.mediaUrl.value);
console.log(mediaArray);
}
const city = 'Shanghai';
const person = this.person.value;
const location = this.location.value;
const title = this.title.value;
const content = this.state.content;
const fileLink = s3Url;
const timestamp = parseInt(this.props.timestamp);
const mediaUrls = mediaArray;
const approved = true;
const adminSpark = true;
const createdBy = Meteor.userId();
insertComment.call({
city, person, location, title, content, fileLink, timestamp, approved, adminSpark, createdBy, mediaUrl,
}, (error) => {
if (error) {
Bert.alert(error.reason, 'danger');
} else {
Bert.alert('Spark added!', 'success');
}
});
}
onChange(html) {
this.setState ({ content: html });
}
appendInput() {
var newInput = `input-${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 use