在身份验证期间,我会返回一些需要在整个用户生命周期中携带到其他组件中的内部ID。这些值保持在authentication
状态,所有其他相关组件逻辑保持在resources
状态。
当我在组件中运行多个状态时,看起来身份验证状态会覆盖资源状态,尽管React状态确实具有值(确认使用了值),但值I {m} undefined
React Dev Tool)。
以下是我的组件中的相关代码:
道具类型:
type ResourceProps =
ResourceState.ResourceState
& AuthState.AuthState
& typeof ResourceState.actionCreators
& RouteComponentProps<{ }>;
Redux connect:
export default connect(
(state: ApplicationState) => state.resources && state.authentication,
ResourceState.actionCreators
)(ResourceDisplay) as typeof ResourceDisplay;
我如何使用不同状态的示例。请在代码中查看我的评论:
//customerInfo comes from authentication state.
if (this.props.customerInfo.subscriptions.length == 0) {
console.log('empty subs list');
}
else {
this.props.customerInfo.subscriptions.forEach(function (subscription) {
// retrieveResources is an action being called from resources. This action populates the resources state.
this.props.retrieveResources(subscription);
});
// This is the resources state that is definitely populated but returning `undefined` in the code.
console.log(this.props.resources);
}
我是否从根本上误解了连接如何将道具连接到Redux状态?
答案 0 :(得分:4)
您期望connect()
在这做什么?
export default connect(
(state: ApplicationState) => state.resources && state.authentication,
ResourceState.actionCreators
)(ResourceDisplay) as typeof ResourceDisplay;
因为目前,您所说的只是state.authentication
如果state.resources
是&#34; truthy&#34; (它可能是)。换句话说,state.resources
不会传递给您的组件。
我猜你真的想要结合两者的属性?如果是这种情况,您需要执行以下操作:
export default connect(
(state: ApplicationState) => { ...state.resources, ...state.authentication },
ResourceState.actionCreators
)(ResourceDisplay) as typeof ResourceDisplay;
或使用Object.assign()
或其他内容(不完全确定您希望从代码中使用哪种道具格式)。