错误本身:
(alias) deleteCategory(id: number): (dispatch: Dispatch<AnyAction>) => void
import deleteCategory
Argument of type '(dispatch: Dispatch) => void' is not assignable to parameter of type 'AnyAction'.
Property 'type' is missing in type '(dispatch: Dispatch) => void' but required in type 'AnyAction'.ts(2345)
问题代码:
export function getCategoryList(
categories: CategoryType[],
dispatch: Dispatch
) {
return categories.map((category: CategoryType) => ({
...category,
onDelete: () => {
dispatch(deleteCategory(category._id)); //FIXME: Fix this. Error Appears here
},
}));
}
deleteCategory的实现
export const deleteCategory = (id: number) => (dispatch: Dispatch) => {
deleteCategoryAPI(id)
.then(() => {
dispatch({
type: DELETE_CATEGORY,
category: id,
});
})
.catch((error) => console.error(error));
};
deleteCategoryAPI的实现
export async function addCategoryAPI(category: CategoryType) {
return fetch(`${API_URL}/categories`, {
method: "POST",
body: JSON.stringify(category),
headers: { "Content-Type": "application/json; charset=UTF-8" },
}).then((response) => response.json());
}
我在这里使用有问题的代码:
const categoryList = getCategoryList(categoryState, dispatch);
...
return (
<List
dataSource={categoryList}
renderItem={({ name, onDelete }) => (
<List.Item>
<CategoryItem name={name} onDelete={onDelete} />
</List.Item>
)}
/>
);
function CategoryItem({ name, onDelete }: categoryItemPropsType) {
export type categoryItemPropsType = {
name: string;
onDelete: () => void;
};
可能是什么问题?为此花了几个小时。
有趣的是,当我在功能组件的其他地方调用dispatch(deleteCategory(category._id))
时,例如它可以正常工作。.非常感谢!
答案 0 :(得分:0)
起初,我可以考虑几种不同的方法,具体取决于您要投入多少精力,对所需的原始实现方式的正确程度以及所需键入的准确性。 / p>
最简单的实现和最真实的API(但类型不正确):
// create your own dispatch function reference with custom typings
export const dispatchStore = store.dispatch as typeof store.dispatch | Dispatch<any>
// use custom typed dispatch (unfortunately, you can pass it almost `any`thing)
dispatchStore(myThunk('id123'))
一个简单的实现,但是需要键入每个呼叫(并且键入仍然很差):
// optional
export const dispatchStore = store.dispatch
// type each dispatch as any (not good if you need to use 'abort', etc)
dispatchStore(myThunk('id123') as any)
此项目符号特定于Redux Toolkit,但可以轻松应用于第三方库(例如Redux)的大多数TypeScript输入问题。在使用redux-toolkit
的情况下,可以创建对configureStore
或createSlice
的引用,并根据您的选择操纵输入。在以下代码中,我将createSlice函数包装在createSlicePlus
中,在幕后添加了一堆便捷逻辑,并增强了args和return类型。
// convenience `request` wrapper around store `dispatch` that abstracts the rest
const promise = counter.request.decrementThunk(500)
// even the RTK thunk promise is typed appropriately
promise.abort()
第三个示例的代码可以在here on Github中找到。