如何在 react-redux 的 mapDispatchToProps 中分派多个动作

Question

mapDispatchToProps 中共有三个函数。我想在 React Component 的构造函数中使用它们的任何函数，但是当我使用 console.log(this.props) 时，它给出了未定义的我如何在构造函数中使用这些函数从 firebase 数据库加载数据？

mapDispatchToProps

const mapDispatchToProps = (dispatch) => {
    return {
        addProductRequest: (data) => {
            console.log(data)
            dispatch(AddNewProduct(data))
        },
        loadProducts: () => {
            dispatch(ViewProducts())
        },
        loadStores: () => {
            dispatch(ViewStores())
        },
    }
}

构造函数

constructor() {
    super();
    this.state = {
        products: [],
        stores: [],
        currentProduct: [],
        stockAvailable: [],
        productName: '',
        description: '',
        qty: 0,
        unitPrice: 0,
        storeName: '',
        selectedProduct: '',
        productNameInStock: '',
        productQtyInStock:0
    }
    console.log(this.props)

    this.props.loadProducts();
    this.props.loadStores();

    this.submit = this.submit.bind(this);
    this.inputHandler = this.inputHandler.bind(this);
}

报错

Uncaught TypeError: Cannot read property 'loadProducts' of undefined

Answer 1

您将使用 redux、f.e 中的 bindActionCreators。:

const mapDispatchToProps = (dispatch) => {
    return {
        ...bindActionCreators({ loadProducts, loadStores }, dispatch)
    }
}

在这种情况下，您将能够通过 this.props.loadProducts() 在组件中创建动作。

Answer 2

现在可以使用了，我忘了在构造函数中传递道具

constructor(props) {
    super();
    this.state = {
        products: [],
        stores: [],
        currentProduct: [],
        stockAvailable: [],
        productName: '',
        description: '',
        qty: 0,
        unitPrice: 0,
        storeName: '',
        selectedProduct: '',
        productNameInStock: '',
        productQtyInStock:0
    }
    console.log(props)

    props.loadProducts();
    props.loadStores();

    this.submit = this.submit.bind(this);
    this.inputHandler = this.inputHandler.bind(this);
}

如何在 react-redux 的 mapDispatchToProps 中分派多个动作

How to dispatch more than one action in mapDispatchToProps in react-redux

reactjs

redux

react-redux