从 redux-saga 调用重新选择选择器

Question

我试图通过将视频 ID 传递给选择器来从 redux-saga 调用组合选择器

import { createSelector } from 'reselect';

 const selectVideoStore = state => state.video;

export const selectVideos = createSelector(
  [selectVideoStore],
  video => video.videos
);

export const selectVideosForPreview = ytid =>
  createSelector(
    [selectVideos],
    videos => (videos ? videos[ytid] : null)
  );

const selectedVideo = yield select(selectVideosForPreview, ytid);
console.log({ selectedVideo });

这个 returns selectedVideo

中的函数

Answer 1

您的 selectVideosForPreview 不是选择器，而是选择器工厂。所以你需要在将它传递给 yield select():

之前创建一个选择器

const selectedVideo = yield select(selectVideosForPreview(ytid));

从 redux-saga 调用重新选择选择器

call reselect selectors from redux-saga

reactjs

redux

redux-saga