React Component hook variable will not update - reactjs

Question

I have a React component that gets data from a parent page/component. I use this data object (jobData) to populate a hook variable value when the component (a modal) is fired. The jobData looks like this: [{id: '17003', file_name: 'My_File', type: 'Medium', state: 'Arkansas'}]. In the browser debugger, I can see the jobData getting passed into the component, but when it gets to return ....<TextField .... value={productID} the productID says undefined! Any suggestions as to what I am doing wrong? I want the TextField to display the value of jobData[0]['id'] when it fires and then store the value of productID when it cahnges.
import React, { useState, useEffect } from 'react';
import { Button, TextField, Dialog, DialogActions, DialogContent, DialogTitle, Modal,
FormControl, Select, InputLabel } from '#mui/material';
import { createTheme, ThemeProvider } from '#mui/material/styles';
export default function ScheduleProdsModal({jobData}) {
const [open, setOpen] = useState(false);
const handleClose = () => setOpen(false);
const handleOpen = () => setOpen(true);
// Below is the hook with problems
let [productID, setProductID] = useState(jobData[0]["id"]);
return (
<div>
<ThemeProvider theme={theme}>
<Button color="neutral" variant="contained" cursor="pointer" onClick={handleOpen}>Schedule Products</Button>
<Dialog open={open} onClose={handleClose}>
<DialogTitle>Schedule Products</DialogTitle>
<DialogContent >
<FormControl fullWidth style={{marginTop: '5px', marginBottom: '5px'}}>
<TextField
autoFocus
margin="dense"
width="100%"
id="my_id"
label="My ID"
type="text"
value={productID}
variant="outlined"
onChange={(e) => {
setProductID(e.target.value);
}}
/>
</FormControl>
</DialogContent>
<DialogActions style={{marginRight: 'inherit'}}>
<Button color="neutral" variant="contained" cursor="pointer" onClick={handleClose}>Close</Button>
<Button color="neutral" variant="contained" cursor="pointer" onClick={handleScheduler}>Schedule</Button>
</DialogActions>
</Dialog>
</ThemeProvider>
</div>
);
}

Answer 1

It seems like you have set jobData array when initialising the projectId, which will be undefined in the first load unless it has been handled in the parent component. Therefore as a workaround we normally use useEffect hook to get the upcoming props changes. So, when the jobData array is not null, you can use setProductID to get the relevant product id inside the useEffect hook. For the time period that you are not getting the data, you can use your favourite loading mechanism to show a loading screen. Find the below code snippet.
const [open, setOpen] = useState(false);
const handleClose = () => setOpen(false);
const handleOpen = () => setOpen(true);
// Below is the hook with problems
let [productID, setProductID] = useState(0);
useEffect(() => {
if(jobData && jobData.length > 0){
setProductID(Number(jobData[0]["id"]))
}
}, [jobData])
// You can put more conditions like undefined and null checking if you want
if(productID === 0){
// Use your fav loading page or loader here
return <>Loading...</>
}
return (
<div>
<ThemeProvider theme={theme}>
Hope this would help.