问使用redux错误，采取(PatternOrChannel)：参数8是无效通道或有效模式

EN

import { all, call, fork, put, takeEvery } from 'redux-saga/effects';
import {  ActionType, Action, SearchCriteria } from '../model/types';
import { searchProjectsError, searchProjectsCompleted } from '../actions/projects';
import { API_URL } from '../../config';
// import axios from 'axios';

function callApi(method: string, url: string, path: string, data?: any) {
    return fetch(url  + path, {
      method,
      headers: {'Content-Type': 'application/json; charset=utf-8', 'Access-Control-Allow-Origin': '*'},
      body: JSON.stringify(data)
    }).then(res => res.json());
  }

// Here we use `redux-saga` to trigger actions asynchronously. `redux-saga` uses something called a
// "generator function", which you can read about here:
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function*

function* handleFetch(action: Action<SearchCriteria>) {
  try {
    // To call async functions, use redux-saga's `call()`.
    const res = yield call(callApi, 'get', API_URL , '/api/DocumentLoader/GetProjects/', action.payload);

    if (res.error) {
      yield put(searchProjectsError(res.error));
    } else {
      yield put(searchProjectsCompleted(res));
    }
  } catch (err) {
    if (err instanceof Error) {
      yield put(searchProjectsError(err.stack!));
    } else {
      yield put(searchProjectsError('An unknown error occured.'));
    }
  }
}

// This is our watcher function. We use `take*()` functions to watch Redux for a specific action
// type, and run our saga, for example the `handleFetch()` saga above.
function* watchFetchRequest() {
  yield takeEvery(ActionType.SEARCH_PROJECTS, handleFetch); // I think the error is here
}

// We can also use `fork()` here to split our saga into multiple watchers.
function* projectSaga() {
  yield all([fork(watchFetchRequest)]);
}

export default projectSaga;

export function searchProjects(criterias: SearchCriteria): Action<SearchCriteria> {
    return {
        type: ActionType.SEARCH_PROJECTS,
        payload: criterias
    };
}

const sagaMiddleware = createSagaMiddleware();

var middleware = applyMiddleware(logger, thunk, sagaMiddleware);

if (process.env.NODE_ENV === 'development') {
    middleware = composeWithDevTools(middleware);
}

// Here we use `redux-saga` to trigger actions asynchronously. `redux-saga` uses something called a
// "generator function", which you can read about here:
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function*
export function* rootSaga() {
    yield all([fork(projectSaga)]);
  }
// running the root saga, and return the store object.
 sagaMiddleware.run(rootSaga);