I get an error when using reactjs useState - reactjs

Question

I am using reactjs. I am using the material-table to get the data with the editable table.
But I get an error like the picture, how can I fix this error?
I use useState for the edit settings of the table.
Please can you help with the error?
I do not receive any errors while receiving data. I just use editing on the table as active / inactive.
But
     const [, forceUpdate] = useState (false);
     const [data, setData] = useState (drBounty);
gives error for lines.
screenshot of the error and my source code below
import React, { Component, useState } from "react";
import withAuth from "../../components/helpers/withAuth";
import AlertMessageBox from "../../components/helpers/AlertMessageBox";
import { connect } from "react-redux";
import { Button, Col, Row, Table, Input } from "reactstrap";
import MaterialTable, { MTableEditRow } from "material-table";
import icons from '#material-ui/core/Icon';
import DeleteOutline from '#material-ui/icons/DeleteOutline';
import Edit from '#material-ui/icons/Edit';
class Bounty extends Component {
constructor(props) {
super(props);
this.state = {
isLoaded: true,
drBounty: [],
drList: [],
columns: [
{ title: 'Name', field: 'doctorName',
cellStyle:{padding: "1px", whiteSpace: "nowrap", overflow: "hidden", textOverflow: "ellipsis", maxWidth: "1px"},
editComponent: (props) => (
<Input
type="text"
placeholder={props.columnDef.title}
defaultValue={props.value}
onChange={(e) => props.onChange(
this.setState({
doctorName: e.target.value
})
)}
/>
)
},
{ title: 'LastName', field: 'doctorLastName',
cellStyle:{padding: "1px", whiteSpace: "nowrap", overflow: "hidden", textOverflow: "ellipsis", maxWidth: "5px"},
editComponent: (props) => (
<Input
type={"text"}
placeholder={"Doktor soyadı"}
defaultValue={props.value}
onChange={(e) => props.onChange(
this.setState({
doctorLastName: e.target.value
})
)}
/>
)
}
]
};
this.getBountyList = this.getBountyList.bind(this);
}
async componentDidMount() {
await fetch(
`${this.domain}/api/user/groupusers?groupCode=`+
this.props.account_profile.profile.profile.groupCode,
{
headers: {
Authorization: `Bearer ${localStorage.getItem("id_token")}`,
"Content-Type": "application/json"
}
}
)
.then(res => {
if (res.ok) {
return res.json();
} else {
return res.json().then(err => Promise.reject(err));
}
})
.then(json => {
console.log(json)
})
.catch(error => {
console.log(error)
return error;
});
}
async getBountyList(id) {
await fetch(`${this.domain}/api/bounty/list?groupCode=${this.props.account_profile.profile.profile.groupCode}&doctor=${id}`,{
headers: {
Authorization: `Bearer ${localStorage.getItem("id_token")}`,
"Content-Type": "application/json"
}
})
.then(res => {
console.log(res);
if (res.ok) {
return res.json();
} else {
return res.json().then(err => Promise.reject(err));
}
})
.then(json => {
console.log(json)
})
.catch(error => {
console.log(error);
return error;
});
}
render() {
const {isLoaded, drList, drBounty} = this.state;
const [, forceUpdate] = useState(false);
const [data, setData] = useState(drBounty);
const isRowUpdating = (rowData, status) => {
rowData.tableData.editing = status ? "update" : undefined;
forceUpdate(status);
};
if (!isLoaded) {
return <div>Loading...</div>;
} else {
return (
<div className={"animated fadeIn "}>
<Row>
<div> </div>
<Col sm={{span:1, offset:0.9}}>
<Table>
<thead>
<tr>
<th width={"20"} />
<th width={"50"}>Adı</th>
<th width={"70"}>Soyadı</th>
</tr>
</thead>
<tbody>
{
drList
.map(item => (
<tr key={item.id}>
<td>
<Button
block
outline
color="info"
onClick={() => this.getBountyList(item.id)}
>
Aç
</Button>
</td>
<td>{item.first_name} </td>
<td>{item.last_name}</td>
</tr>
))}
</tbody>
</Table>
</Col>
<MaterialTable
Icons={icons}
style={{height: "50", width: "50"}}
columns={ this.state.columns }
data={ this.state.drBounty }
actions={[
rowData => ({
icon: Edit,
tooltip: "Edit row",
onClick: (event, rowData) => {
isRowUpdating(rowData, true);
this.setState({
id: rowData.id,
user: rowData.user,
doctor: rowData.doctor,
doctorName: rowData.doctorName,
doctorLastName: rowData.doctorLastName,
totalBounty: rowData.totalBounty,
description: rowData.description,
customerName: rowData.customerName,
bountyDate: rowData.bountyDate,
createdDate: rowData.createdDate,
groupCode: rowData.groupCode
});
}
})
]}
components={{
EditRow: props => {
const newRowData = {
...drBounty, // *MUST INCLUDE tableData FROM ORIGINAL props.data!!*
id: "DEFAULT VALUES", // <-- // Set whatever default data you want here
doctorName: "ON EDIT" // <-- // (or pull from state, etc.. whatever you want)
};
return (
<MTableEditRow
{...props}
data={newRowData}
onEditingCanceled={(mode, rowData) => {
isRowUpdating(rowData, false);
}}
onEditingApproved={(mode, newData, oldRowData) => {
const dataCopy = [...drBounty];
const index = drBounty.indexOf(props.data);
dataCopy[index] = newData;
setData(dataCopy);
isRowUpdating(props.data, false);
}}
/>
);
}
}}
/>
</Row>
</div>
);
}
}
}
export default connect(withAuth( Bounty ));

Answer 1

You are trying to use the Hook (useState()) inside the render() method. Hooks can only be used inside of function components. However, you are using a class component so you have no need of this Hook.
Suggested Reading: https://reactjs.org/docs/hooks-state.html
Instead of using a Hook, you can use the following in your class component to accomplish the same results. Let's have a look :)
Initialize State in Constructor
this.state = { foo: bar };
You have already done this!
Update State with this.setState()
const [data, setData] = useState(drBounty);
Becomes ..
this.setState({data:drBounty});
However, you want to update the drBounty prop that you set up in the constructor, so you will want something more like this ..
this.setState({drBounty:someData})
Since that prop is an array, you will most likely want to spread (...) that data using the current array.
Re-Render without Updating State
As for your other implementation of useState() it appears you want to re-render without making any updates to state.
const [, forceUpdate] = useState(false);
However, instead you will want to simply use ...
this.render()