Redux-saga:配置存储的错误

Question

我正在尝试创建一个存储，并将redux-saga中间件应用于它。我已经配置了所有的东西，但是当我运行这个项目时，会弹出下面的错误。

***Error: Before running a saga, you must mount the saga middleware on the store
using applyMiddleware

我错误地锁定了在线sagaMiddleware.run(sagas);。

store.js

import { createStore, applyMiddleware, compose } from 'redux';
import { createLogger } from 'redux-logger';
import createSagaMiddleware from 'redux-saga';
import sagas from '../redux/sagas';

const logger = createLogger({
  predicate: (getState, action) => isDebuggingInChrome,
  collapsed: true,
  duration: true,
  diff: true,
});

export default function configureStore() {
  const sagaMiddleware = createSagaMiddleware();
  const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;

  const store = createStore(
    applyMiddleware(sagaMiddleware, logger),
  );

  sagaMiddleware.run(sagas);

  return store;
}

知道我做错什么了吗？

react-native: 0.57.0
redux-saga: ^0.16.0
redux: ^4.0.0

Answer 1

这是因为您没有正确地创建store，请注意，您没有传递rootReducer

createStore是一个增强器，它返回一个函数，该函数将rootReducer作为参数，其结果是store。

你可能想做这样的事情，而不是：

import { createStore, applyMiddleware, compose } from 'redux';
import { createLogger } from 'redux-logger';
import createSagaMiddleware from 'redux-saga';
import sagas from '../redux/sagas';
import rootReducer from '../redux/rootReducer';

const logger = createLogger({
  predicate: (getState, action) => isDebuggingInChrome,
  collapsed: true,
  duration: true,
  diff: true,
});
const enhancers = process.env.NODE_ENV !== 'production' && window.devToolsExtension
  ? [window.devToolsExtension()]
  : [];

export default function configureStore() {
  const sagaMiddleware = createSagaMiddleware();

  const store = compose(
    applyMiddleware(sagaMiddleware, logger),
    ...enhancers
  )(createStore)(rootReducer);

  sagaMiddleware.run(sagas);

  return store;
}