Javascript 警告：失败的propType:未在“DimensionPicker”中指定必需的prop“dimensionName”。检查“连接”（维度选择器）的渲染方法`

我有以下Redux+React组件

import {PropTypes, React, Component} from 'react';
import Select from 'react-select';

class DimensionPicker extends Component {
    componentDidMount() {
        const {onLoad} = this.props;
        onLoad();
    }
    render() {
        const {onChange, attributeList, currentAttribute} = this.props;
        return (
            <div>
                <Select value={currentAttribute} options={attributeList} onChange={onChange} />
            </div>
        )       
    }
}

DimensionPicker.propTypes = {
    dimensionName: PropTypes.string.isRequired,
    onChange: PropTypes.func.isRequired,
    attributeList: PropTypes.arrayOf(PropTypes.shape({
        value: PropTypes.string.isRequired,
        label: PropTypes.string.isRequired
    }).isRequired).isRequired,
    currentAttribute: PropTypes.string.isRequired
}

export default DimensionPicker;

import React from 'react';
import DimensionPickerActions from '../actions/DimensionPickerActions';
import {connect} from 'react-redux';
import DimensionPicker from './controls/DimensionPicker.jsx';

const mapStateToProps = (state) => {
    return {
        dimensionName: state.dimensionName,
        attributeList: state.attributeList,
        currentAttribute: state.currentAttribute
    }
}

const mapDispatchToProps = (state) => {
    return {
        onChange: (newValue) => {
            dispatch(updateAttributeSelection(newValue));
        },
        onLoad: () => {
            dispatch(fetchDimensionAttributes(state.dimensionName));
        }
    }
}

export default connect(mapStateToProps, mapDispatchToProps)(DimensionPicker);

我还有一个填充初始状态的减速器

// define the state tree for the dimenion picker.
const initialState = {
    dimenisionName: '',
    isLoading :'false',
    error : '',
    currentAttribute: '',
    attributeList: []
}

function dimensionPickerReducer(state = initialState, action) {

    switch(action.type) {
        case ATTRIBUTE_SELECTION_CHANGED: 
            return Object.assign({}, state, {currentAttribute: action.data});
            break;
        case REQUEST_DIMENSION_ATTRIBUTES:
            return Object.assign({}, state, {isLoading: 'true', error: ''})
            break;
        case DIMENSION_ATTRIBUTES_RECEIVED:
            return Object.assign({}, state, {attributeList: action.data, isLoading: 'false', error: action.error});
            break;
        case SET_DIMENSION_NAME:
            return Object.assign({}, state, {dimensionName: action.data})
            break;
        default:
            return state;
            break;
    }
}

export default dimensionPickerReducer;

我像这样建立我的国家商店

import React from 'react';
import { createStore, combineReducers, applyMiddleware } from 'redux';
import thunk from 'redux-thunk';
import { Provider } from 'react-redux';
import DataTableReducer from './reducers/DataTableReducer';
import DimensionPickerReducer from './reducers/DimensionPickerReducer';

const combinedReducer = combineReducers({
    dataTable: DataTableReducer,
    dimensionPicker: DimensionPickerReducer
});
export default applyMiddleware(thunk)(createStore)(combinedReducer);

我像这样加载组件

import React from 'react';
import DimensionPicker from '../containers/DimensionPickerContainer';

const App = () => (
    <div>
    <DimensionPicker dimensionName="Genre"/>
    </div>
    )

export default App;

我已经在这里发布了我的整个代码库

您将“初始状态”作为默认参数提供给减速器，但这仅在实际调用减速器时用作该减速器的默认状态。由于您尚未调度任何操作，初始状态取决于您提供给

createStore

的值，可能是在

MovieLensAppStore

中

我不知道你是如何创建你的商店的，但这应该是可行的，例如：

createStore(
    combineReducers({
        dimensionPickerReducer
    }),
    {
        dimensionPicker: {
            dimenisionName: '',
            isLoading :'false',
            error : '',
            currentAttribute: '',
            attributeList: []
        }
    }
)

---

问题解决了。这里最麻烦的是combinereducer没有正确初始化状态，这就是为什么容器控件说没有指定props（因为状态为空）

这里记录了解决方案

---

您省略了实际初始化redux的代码，并执行初始的

渲染。执行此操作的时间点将决定何时填充初始数据。此外，应用程序最好是
connect
ed，而不是
DimensionPicker
。这使得它可以重用，尽管它不能解决您眼前的问题。请看一看我加了这个。但现在它又给出了一个错误（和以前的错误一样）
在传递给createStore的initialState参数中发现了意外的键“dimensionName”、“isLoading”、“error”、“currentAttribute”、“attributeList”。期望找到一个已知的reducer键：“dataTable”、“dimensionPicker”。意外的键将被忽略。
请查看此处。我根据你的GitHub发布了问题的根本原因，看起来你已经发现了我的错误。忘记带商店钥匙了。我编辑了我的答案以符合要求。
Warning: Failed propType: Required prop `dimensionName` was not specified in `DimensionPicker`. Check the render method of `Connect(DimensionPicker)`.

createStore(
    combineReducers({
        dimensionPickerReducer
    }),
    {
        dimensionPicker: {
            dimenisionName: '',
            isLoading :'false',
            error : '',
            currentAttribute: '',
            attributeList: []
        }
    }
)