我想學反應,我從我的節目標題偶然發現了錯誤。這裏是我的代碼:REACT:未處理的抑制(類型錯誤):this.props.flights.forEach不是一個函數
class FlightRow extends React.Component{
handleClicke=(event)=>{
console.log('delete button pentru '+this.props.flight.flightId);
this.props.deleteFunc(this.props.flight.flightId);
}
render() {
return (
<tr>
<td>{this.props.flight.flightId}</td>
<td>{this.props.flight.destination}</td>
<td>{this.props.flight.airport}</td>
<td>{this.props.flight.freeseats}</td>
<td>{this.props.flight.datehour}</td>
<td><button onClick={this.handleClicke}>Delete</button></td>
</tr>
);
}
}
class FlightTable extends React.Component {
render() {
var rows = [];
var functieStergere=this.props.deleteFunc;
this.props.flights.forEach(function(flight) {
rows.push(<FlightRow flight={flight} key={flight.flightId} deleteFunc={functieStergere} />);
});
return (<div className="FlightTable">
<table className="center">
<thead>
<tr>
<th>FlightId</th>
<th>Destination</th>
<th>Airport</th>
<th>Freeseats</th>
<th>Datehour</th>
<th></th>
</tr>
</thead>
<tbody>{rows}</tbody>
</table>
</div>
);
}
}
export default FlightTable;
我在FlightTable類的第一行出現錯誤,當我試圖填充它時。在我啓動應用程序後,立即看到表格填滿了應該如何,然後我收到錯誤。
這裏是我聲明我的「航班」數組。
class FlightApp extends React.Component{
constructor(props){
super(props);
this.state={flights:[{"flightId":12,"destination":"CCCCC","airport":"AAAAA","freeseats":100,"datehour":"2017-02-02"},{"flightId":13,"destination":"CCCCC","airport":"AAAAA","freeseats":100,"datehour":"2017-02-02"}],
deleteFunc:this.deleteFunc.bind(this),
addFunc:this.addFunc.bind(this),
}
console.log('FlightApp constructor')
}
addFunc(flight){
console.log('inside add Func '+flight);
AddFlight(flight)
.then(res=> GetFlights())
.then(flights=>this.setState({flights}))
.catch(erorr=>console.log('eroare add ',erorr));
}
deleteFunc(flight){
console.log('inside deleteFunc '+flight);
DeleteFlight(flight)
.then(res=> GetFlights())
.then(flights=>this.setState({flights}))
.catch(error=>console.log('eroare delete', error));
}
componentDidMount(){
console.log('inside componentDidMount')
GetFlights().then(flights=>this.setState({flights}));
}
render(){
return(
<div className="FlightApp">
<h1>Flight Management</h1>
<FlightForm addFunc={this.state.addFunc}/>
<br/>
<br/>
<FlightTable flights={this.state.flights} deleteFunc={this.state.deleteFunc}/>
</div>
);
}
}
export default FlightApp;
的「GetFlights()」方法是這樣的,並呼籲從Java REST春天服務器的方法返回一個列表
export function GetFlights(){
var headers = new Headers();
headers.append('Accept', 'application/json');
var myInit = { method: 'GET',
headers: headers,
mode: 'cors'};
var request = new Request(CHAT_USERS_BASE_URL, myInit);
console.log('Inainte de fetch pentru '+CHAT_USERS_BASE_URL)
return fetch(request)
.then(status)
.then(json)
.then(data=> {
console.log('Request succeeded with JSON response', data);
return data;
}).catch(error=>{
console.log('Request failed', error);
return error;
});
}
我怎麼能解決這個問題?謝謝。
看起來你的API沒有返回數組。 'console.log('請求成功使用JSON響應',data)的輸出是什麼? – Panther
除了這個問題之外,你已經在'FlightApp'狀態中設置了不正確的綁定函數。綁定函數應該在外部。有什麼需要讓他們進入狀態? – Panther