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我想從使用React的Firebase呈現數組。我有一個Container視圖,它從firebase獲取數據,並將數據傳遞給子組件。下面是代碼:React ES6 |子組件未呈現
Container.jsx
import React from 'react'
import Firebase from 'firebase'
import loadsTable from './loadstable'
class Container extends React.Component{
constructor(props){
super(props)
this.loads = [];
this.state = {loads:[]}
}
render(){
console.log("render" , this.state.loads)
return(<div>
<loadsTable loads={this.state.loads}/>
</div>
)
}
componentWillMount(){
this.firebaseRef = new Firebase("https://***.firebaseio.com/loads");
this.firebaseRef.on("child_added", function(dataSnapshot) {
console.log(dataSnapshot.val())
this.loads.push(dataSnapshot.val());
this.setState({
loads: this.loads
});
}.bind(this));
}
}
React.render(<Container/> , document.getElementById('app'))
這個成功獲取數據(負載),以及console.logs相同。
下面是子組件代碼:
LoadsTable.jsx
import React from 'react'
class loadsTable extends React.Component{
constructor(props){
super(props)
console.log("init loadsTable");
this.state = {loads:this.props.loads}
}
render(){
console.log("this.state.loads " , this.props.loads);
console.log("this.state.loads " , this.state.loads);
var loads = this.props.loads.map(function(load, index){
console.log("load " , load)
return <tr><td>{load.load_number}</td></tr>
});
return(
<div className="col-md-7">
<table className="table table-hover table-bordered table-striped loads">
<tbody>
{loads}
</tbody>
</table>
</div>
)
}
}
export default loadsTable
這裏的問題是,沒有被渲染而事實上,在構造函數中的console.log是永遠調用。如果我在集裝箱constuctor CONSOLE.LOG的LoadsTable,我得到:
Chrome瀏覽器開發控制檯輸出
function loadsTable(props) {
_classCallCheck(this, loadsTable);
_get(Object.getPrototypeOf(loadsTable.prototype), "constructor", this).call(this, props);
console.log("init loadsTable");
this.state = { loads: this.props.loads };
}
所以,我的問題是:沒有任何人知道我在做什麼錯在這裏,爲什麼LoadsTable沒有被實例化?
我正在使用Gulp構建和babelify來傳輸ES6。
對此的任何幫助將非常感激。提前致謝。
非常感謝這位菲利克斯! –