我有一个组件,我试图用我的道具中的一些选项填充<Select />
组件。当组件安装时,我将jobNumbers
的状态设置为空数组。
我有两个下拉列表,其中一个值取决于另一个选定值。选择该值后,我运行onChange
函数来填充第二个下拉列表。唯一的问题是当我执行this.setState({jobNumbers: [...array elements...]})
时,状态仍然显示jobNumbers
数组为空。实际执行状态设置的功能是getCustomerOptions()
。
这是我的整个组件(它不是太长了)
import React from 'react';
import SelectInput from '../../components/SelectInput';
import LocationSelector from '../../components/LocationSelector';
import { Field } from 'redux-form/immutable';
import Select from 'react-select';
import 'react-select/dist/react-select.css';
class InputCurrentCustomerLocation extends React.Component {
constructor(props) {
super(props);
this.state = {
jobNumbers: [],
};
this.getCustomerOptions = this.getCustomerOptions.bind(this);
this.onChange = this.onChange.bind(this);
}
componentWillMount() {
if (this.props.active) {
this.props.input.onChange(this.props.active);
}
}
onChange(event) {
if (this.props.input.onChange) {
this.props.input.onChange(event.value); // <-- To be aligned with how redux-form publishes its CHANGE action payload. The event received is an object with 2 keys: "value" and "label"
// Fetch our Locations for this customer
this.props.handleCustomerLocationFetch(event.value);
this.getCustomerOptions(event);
}
}
getCustomerOptions(event) {
let options = [];
if(event) {
this.props.options.forEach((option, index) => {
if(option.value === event.value) {
console.log('props options', this.state);
this.setState({ jobNumbers: this.props.options[index] });
console.log('state options', this.state);
}
})
}
}
render() {
const { meta } = this.props;
return (
<div>
<Select
options={this.props.options} // <-- Receive options from the form
{...this.props}
value={this.props.input.value || ''}
// onBlur={() => this.props.input.onBlur(this.props.input.value)}
onChange={this.onChange.bind(this)}
clearable={false}
/>
{meta.error && <div className="form-error">{meta.error}</div>}
{this.props.activeLocations ? false : (
<div>
<div>
<p> Select a location </p>
<Field
name="locations"
component={props =>
<LocationSelector
{...props}
// active={this.props.activeLocations}
locations={this.props.locations}
/>
}
/>
</div>
<div>
<p> Select a job number</p>
<Field
name="jobNumber"
component={props =>
<Select
options={this.state.jobNumbers}
value={this.props.input.value || ''}
onChange={this.onChange.bind(this)}
clearable={false}
/>
}
/>
</div>
</div>
)}
</div>
);
}
}
export default InputCurrentCustomerLocation;
我对React和redux相对较新,我不完全确定为什么会这样。不应该填充国家吗?
答案 0 :(得分:0)
this.setState({ jobNumbers: this.props.options[index] });
是异步的。 因此,当您在setState之后执行控制台登录状态时,状态仍然无法更改。 你应该检查componentDidUpdate(prevProps,prevState)上的值,并在那里打印。