我是MobX的新手,在调用异步操作时遇到了一些问题。我的商店具有用于更新Observabel数组的异步功能:
export class AccountStore implements IAccountStore {
@observable accounts:any = [];
@observable state = "pending"; // "pending" / "done" / "error"
@action
public async getAccounts() {
this.state = "pending"
try {
const res = await accountsService.getAll();
runInAction(() => {
console.log(res);
this.state = "done";
this.accounts.replace(res.data);
})
} catch (error) {
runInAction(() => {
this.state = error;
})
}
}
}
但是我的组件不会在更新时重新渲染(在componentDidMount上调用):
interface AppProps {
accountStore: IAccountStore
}
@inject('accountStore')
@observer
class AllAcounts extends Component<AppProps, any> {
constructor(props: any) {
super(props);
}
public componentDidMount() {
this.props.accountStore.getAccounts();
console.log(this.props.accountStore)
}
render() {
const accounts = this.props.accountStore.accounts;
return (
<div>
<h4>All accounts</h4>
{accounts.map((item: any, index: number) => {
<p key={index}>{item.name}</p>
})
}
<button onClick={() => this.props.accountStore.getAccounts()}>Update</button>
</div>
);
}
}
export default AllAcounts;
当我在Chrome中使用React检查器时,我看到道具正在更新。
关于我要去哪里的任何建议吗?
答案 0 :(得分:1)
您不会从组件的render方法中提供给map
的函数中返回任何内容。添加return
关键字,它将按预期工作。
{accounts.map((item, index) => {
return <p key={index}>{item.name}</p>;
})}