Reactjs Redux-错误：mergeProps的类型对象的值无效

我在使删除分派事件正常工作时遇到问题。我正在尝试从状态中删除列表项

我得到的错误如下：

Error: Invalid value of type object for mergeProps argument when connecting 
component Invoices.

我是redux新手，尝试过各种不同的方法

据我所知，Redux在Invoices.js的下面几行中抛出了一个错误

export default connect(
mapStateToProps,
mapDispatchToProps,
{ getInvoices }
)(Invoices);

如果我取出mapDispatchToProps，则错误将停止，但显然我无法使用此方法。我已尝试将另一个参数设置为null，以防它需要一个mergeProps参数（尽管它是可选的），如下所示：

export default connect(
mapStateToProps,
mapDispatchToProps,
null,
{ getInvoices }
)(Invoices);

然而，我似乎无法回避这个错误

注意：一切正常，只是在引入mapDispatchToProps/delete dispatch时，我遇到了这个错误

我有以下文件：

//Invoices.js
import React, { Component } from "react";
import { connect } from "react-redux";
import PropTypes from "prop-types";
import Spinner from "../common/Spinner";
import InvoiceItem from "./InvoiceItem";
import { getInvoices, deleteInvoice } from "../../actions/invoiceActions";

class Invoices extends Component {
componentDidMount() {
this.props.getInvoices();
}

render() {
const { invoices, loading } = this.props.invoice;
let invoiceItems;

if (invoices === null || loading) {
  invoiceItems = <Spinner />;
} else {
  if (invoices.invoices.length > 0) {
    invoiceItems = invoices.invoices.map(invoice => (
      <InvoiceItem
        key={invoice.Id}
        invoice={invoice}
        delete={this.props.delete}
      />
    ));
  } else {
    invoiceItems = <h4>No invoices found...</h4>;
  }
  }

  return (
  <div className="profiles">
    <div className="container">
      <div className="row">
        <div className="col-md-12">
          <h1 className="display-4 text-center">Invoices</h1>
          {invoiceItems}
        </div>
      </div>
    </div>
  </div>
  );
 }
}

Invoices.propTypes = {
getInvoices: PropTypes.func.isRequired,
deleteInvoice: PropTypes.func,
invoice: PropTypes.object.isRequired
};

const mapStateToProps = state => {
 return {
  invoice: state.invoices
 };
};

const mapDispatchToProps = dispatch => {
  return {
   deleteInvoice: invoice => dispatch(deleteInvoice.deleteInvoice(invoice))
  };
};

export default connect(
mapStateToProps,
mapDispatchToProps,
{ getInvoices }
)(Invoices);

---

您需要从connect方法中删除{getInvoices}，并将其添加到mapStateToProps函数中，如下所示

const mapDispatchToProps = dispatch => {
  return {
   deleteInvoice: invoice => dispatch(deleteInvoice.deleteInvoice(invoice)),
   getInvoices: actions.getInvoices // you should send your action like this
  };
};

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

// invoicesReducer.js
import {
GET_INVOICES,
DELETE_INVOICE,
INVOICES_LOADING
} from "../actions/types";

const initialState = {
invoices: [],
loading: false
};

export default function(state = initialState, action) {
console.log(action);
switch (action.type) {
case INVOICES_LOADING:
  return {
    ...state,
    loading: true
  };
case GET_INVOICES:
  return {
    ...state,
    invoices: action.payload,
    loading: false
  };
case DELETE_INVOICE:
  return {
    invoices: state.invoices.filter(
      invoice => invoice.Id !== action.payload
    )
  };

default:
  return state;
}
}

// invoiceActions.js
import axios from "axios";
import { GET_INVOICES, DELETE_INVOICE, INVOICES_LOADING } from "./types";

// I have left out the GET_INVOICES action here. It's a long Axios call and 
is working fine....

// Delete Invoice
export const deleteInvoice = invoice => dispatch => {
 dispatch({
type: DELETE_INVOICE,
payload: invoice
});
};

// types.js
export const GET_INVOICES = "GET_INVOICES";
export const GET_INVOICE = "GET_INVOICE";
export const DELETE_INVOICE = "DELETE_INVOICE";
export const INVOICES_LOADING = "INVOICES_LOADING";

const mapDispatchToProps = dispatch => {
  return {
   deleteInvoice: invoice => dispatch(deleteInvoice.deleteInvoice(invoice)),
   getInvoices: actions.getInvoices // you should send your action like this
  };
};

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