Javascript 此错误消息的目的是什么?动作必须是普通对象。使用自定义中间件进行异步操作
actionTypes.jsJavascript 此错误消息的目的是什么?动作必须是普通对象。使用自定义中间件进行异步操作,javascript,reactjs,asynchronous,redux,axios,Javascript,Reactjs,Asynchronous,Redux,Axios,actionTypes.js export const ADD_INGREDIENT = 'ADD_INGREDIENT'; export const REMOVE_INGREDIENT = 'REMOVE_INGREDIENT'; export const SET_INGREDIENTS = 'SET_INGREDIENTS'; export const FETCH_INGREDIENTS_FAILED = 'FETCH_INGREDIENTS_FAILED'; burgerBuilder.
export const ADD_INGREDIENT = 'ADD_INGREDIENT';
export const REMOVE_INGREDIENT = 'REMOVE_INGREDIENT';
export const SET_INGREDIENTS = 'SET_INGREDIENTS';
export const FETCH_INGREDIENTS_FAILED = 'FETCH_INGREDIENTS_FAILED';
burgerBuilder.js/actions
export const setIngredients = (ingredients) => {
return {
type: actionTypes.SET_INGREDIENTS,
ingredients: ingredients
};
};
export const fetchIngredientsFailed = () => {
return {
type: actionTypes.FETCH_INGREDIENTS_FAILED
};
};
export const initIngredients = () => {
return dispatch => {
axios.get('/ingredients.json')
.then(response => {
dispatch(setIngredients(response.data))
})
.catch(error => {
dispatch(fetchIngredientsFailed())
});
};
};
burgerBuilder.js/reducer
case actionTypes.SET_INGREDIENTS:
return {
...state,
ingredients: action.ingredients,
error: false
};
case actionTypes.FETCH_INGREDIENTS_FAILED:
return {
...state,
error: true
};
BurgerBuilder.js/containers
componentDidMount () {
this.props.onInitIngredients();
}
//Some Code...
const mapStateToProps = state => {
return {
ings: state.ingredients,
price: state.totalPrice,
error: state.error
}
};
const mapDispatchToProps = dispatch => {
return {
onIngredientAdded: (ingName) => dispatch(burgerbuilderActions.addIngredient(ingName)),
onIngredientRemoved: (ingName) => dispatch(burgerbuilderActions.removeIngredient(ingName)),
onInitIngredients: () => dispatch(burgerbuilderActions.initIngredients())
}
};
export default connect(mapStateToProps, mapDispatchToProps)(withErrorHandler(BurgerBuilder, axios));
index.js
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';
import {Provider} from 'react-redux';
import {createStore, applyMiddleware, compose} from 'redux';
import {BrowserRouter} from 'react-router-dom';
import thunk from 'redux-thunk';
import burgerBuilderReducer from './store/reducers/burgerBuilder';
const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION__ || compose;
const store = createStore(burgerBuilderReducer, composeEnhancers(
applyMiddleware(thunk)
));
const app = (
<Provider store={store}>
<BrowserRouter>
<App/>
</BrowserRouter>
</Provider>
);
从“React”导入React;
从“react dom”导入react dom;
从“./App”导入应用程序;
从'react redux'导入{Provider};
从'redux'导入{createStore,applyMiddleware,compose};
从“react router dom”导入{BrowserRouter};
从“redux thunk”导入thunk;
从“/store/reducers/burgerBuilder”导入burgerBuilderReducer;
const composeinhancers=window.uuu REDUX_DEVTOOLS_uuextension_uuu124; | compose;
const store=createStore(burgerBuilderReducer,composeEnhancers(
applyMiddleware(thunk)
));
常量应用=(
);
当我在一个演示项目中工作时,我遇到了这个错误“操作必须是普通对象。使用自定义中间件进行异步操作”。我不知道,但我觉得这个错误来自burgerBuilder.js/action文件中的initComponents()。
我是新来的 似乎代码当前已被破坏, 您可以通过更改来解决此问题:
const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION__ || compose;
const store = createStore(burgerBuilderReducer, composeEnhancers(
applyMiddleware(thunk)
));
与:
请告诉我们您是如何开设店铺的。看起来您打算使用redux thunk中间件,它允许您分派函数,但显然redux thunk设置不正确@NicholasTower是的很抱歉!我添加了index.js文件
const store = createStore(
rootReducer,
//composeEnhancers(applyMiddleware(thunk)) // => NOTE: This would break the code!
// Thisone instead will work fine...
compose(
applyMiddleware(
thunk
// Other middlewares
),
window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__() // Chrome debugger
)
);