redux-saga无法捕获商店增强器发送的操作

Question

我需要在我的redux应用程序中使用商店增强器（来自qazxsw poi的Redux Firebase）。这个增强器调度一个动作，它看起来或多或少像这样（非常简化）：

react-redux-firebase

我希望saga听取所有动作和console.log它们，但它不会捕获增强器调度的“DUMMY_ACTION”，因为它是在saga开始侦听之前调度的（

const reactReduxFirebase = (next) => {
  return (reducer, initialState, middleware) => {
    const store = next(reducer, initialState, middleware);
    store.dispatch({
      type: 'DUMMY_ACTION'
    });
    return store;
  }
}

// usage
const sagaMiddleware = createSagaMiddleware();
const middleware = [sagaMiddleware];
const store = createStore(
  reducer,
  initialState,
  compose(
    applyMiddleware(...middleware),
    reactReduxFirebase
  )
);
sagaMiddleware.run(sagas);

// sagas.js
function* handle(action) {
  console.log(action);
}

function* saga() {
  yield takeEvery('*', handle);
}

export default saga;

）。从redux-saga文档来看，似乎必须在applyMiddleware之后运行saga，所以我无法在增强器之前运行saga。有什么方法可以使它工作，所以传奇也将从增强器中捕获一个动作？

Answer 1

试试这个传奇

sagaMiddleware.run(sagas);

只是为了看它是否有效然后你可以尝试移动到takeEvery，我确实遇到了问题，并创建特定于saga工作的句柄

Answer 2

基于

function* log(action) {
  while (true) {
    yield take('*');
    console.log(action);
  }
}

export default function* root() {
  yield all([call(log)]);
}

的解决方案：

applyMiddlware

日志：

import createSagaMiddleware from 'redux-saga';
import { takeEvery } from 'redux-saga/effects';
import { createStore, compose } from 'redux';
import {
  reducer
} from '../reducers';

function sagaPreinitMiddleware(saga) {
  return (createStore) => (reducer, preloadedState, enhancer) => {
    const sagaMiddleware = createSagaMiddleware();

    const store = createStore(reducer, preloadedState, enhancer);
    let dispatch = store.dispatch;
    const middlewareAPI = {
      getState: store.getState,
      dispatch: (action) => dispatch(action)
    };
    dispatch = compose(sagaMiddleware(middlewareAPI))(store.dispatch);
    sagaMiddleware.run(saga); // run the saga
    return {
      ...store,
      dispatch
    };
  };
}

const reactReduxFirebase = (next) => {
  return (reducer, initialState, middleware) => {
    const store = next(reducer, initialState, middleware);
    store.dispatch({
      type: 'DUMMY_ACTION'
    });
    setTimeout(store.dispatch({
      type: 'DUMMY_ACTION_1'
    }), 100);
    return store;
  };
};

// usage
const middleware = [];
const store = createStore(
  reducer,
  0,
  compose(
    reactReduxFirebase,
    sagaPreinitMiddleware(sagas)
  )
);


// sagas.js
function* handle(action) {
  console.log(action);
}

function* sagas() {
  yield takeEvery('*', handle);
}