我正在使用Redux & React从API加载数据。尽管成功地提取了数据并将其应用于状态，但它仍抛出了一个错误：
未捕获的类型错误：无法读取未定义的属性“payload”。
这发生在控制台中的FETCH_PRODUCT_LISTINGS_PENDING操作类型之后。

React组件：

import React from 'react';
import { connect } from 'react-redux';
import store from '../../../store';

import * as ProductListingActions from '../actions/ProductListingActions';

@connect((store) => {
    return {
        productListing: store.productListing.products
    }
})

export default class ProductListingContainer extends React.Component {
    constructor(data) {
        super();
        this.props = data;
        this.props.dispatch(ProductListingActions.fetchProductListings());
    }
    render() {
        return <div></div>;
    }
}

减速器：

import CookieHandler from '../../../modules/CookieHandler';
const cookieHandler = new CookieHandler;

export default function reducer(
    state = {
        products: [],
        fetching: false,
        fetched: false,
        error: null
    }, action) {

    switch(action.type) {
        case "FETCH_PRODUCT_LISTINGS_PENDING":
            return {
                ...state,
                fetching: true,
            }
            break;
        case "FETCH_PRODUCT_LISTINGS_REJECTED":
            return {
                ...state,
                fetching: false,
                error: action.payload
            }
            break;
        case "FETCH_PRODUCT_LISTINGS_FULFILLED":
            return {
                ...state,
                fetching: false,
                fetched: true,
                products: action.payload.data.default
            }
            break;
    }

    return state;
}

操作：

import Config from '../../../Config.js';
import store from '../../../store.js';
import axios from 'axios';

export function fetchProductListings() {
    store.dispatch({
        type: "FETCH_PRODUCT_LISTINGS",
        payload: axios.get(Config.getConfigAPIUrl() + '/cartel/products')
    })

}

任何帮助都将不胜感激