redux-saga 中的 Promise [英] Promises in redux-saga

问题描述

我在这里发现了同样的问题，但没有适当的我正在寻找的答案.

I found the same question here, but without a proper answer I am looking for.

我正在开发一个带有 CRUD 操作的简单应用程序.在编辑页面上，在组件挂载后(componentDidMount())，应用程序会调度一个操作来检索特定的帖子详细信息:

I am developing a simple application with CRUD operations. On the edit page, after the component gets mounted (componentDidMount()), the app dispatches an action to retrieve a specific post details:

dispatch({ type: FETCH_POST, id: 'post-id' })

我正在使用 redux-saga 并希望上述调用返回一个 Promise，以便我可以访问 API 响应.

I am using redux-saga and want the above call to return a Promise so that I can access the API response.

现在，没有回调/承诺，我最终在商店中定义了一个新状态(如 post_edited)并将其连接/映射到组件中的道具以进行编辑页面.

Right now, without a callback/Promise, I ended up with defining a new state in store (like post_edited) and connect/map it to props in the component for edit page.

处理这种情况的最佳方法是什么?

What would be the best possible way to deal with this kind of situation?

推荐答案

您能否提供有关您的问题的更多信息?我不确定我是否正确理解您的问题，但通常的做法是:

Could you please provide more information about your issue? I'm not sure if I understand your issue properly, but the common practice is:

API.js

function apiCallToFetchPost(id) {
  return Promise.resolve({name: 'Test});
}

postSaga.js

postSaga.js

function* fetchPostSaga({id}) {
  try {
    const request = yield call(apiCallToFetchPost, id);
    // -> in post reducer we will save the fetched data for showing them later 
    yield put({type: FETCH_POST_SUCCESS, payload: request}); 
  } catch (error) {
    yield put({type: FETCH_POST_SUCCESS_FAILURE, error})
  }
}

export function* onBootstrap() {
  yield takeLatest(FETCH_POST, fetchPostSaga);
}

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