React UseTable：类型错误：无法读取未定义的属性（读取“forEach”）

Question

快速帮助这里！当我尝试将数据渲染到反应表中时，出现上述错误。数据来自 axios 的 api。

这是代码

import axios from "axios";
import React, { useEffect, useState, useMemo } from "react";
import "./Modal.css";
import { useTable } from "react-table";
import { COLUMNS } from "./columns";
import "./my_style.css";
const ViewTcMapping = () => {
  const [data, setData] = useState({});

  const baseURL =
    "http://127.0.0.1:8000/api/business_process/risk_tc_mapping_details";

  useEffect(() => {
    axios
      .get(baseURL)
      .then((response) => {
        setData(response.data);
      })
      .then(
        (response) => {},
        (err) => {
          alert("No Data To Show");
        }
      )
      .catch((err) => {
        return false;
      });
  }, []);

  const columns = useMemo(() => COLUMNS, []);
  const mydata = useMemo(() => data, []);
  const tableInstance = useTable({
    columns,
    mydata,
  });

  const {
    getTableProps,
    getTableBodyProps,
    headerGroups,
    rows,
    prepareRow,
  } = tableInstance;
  return (
    <div className="z-100 flex justify-center items-center">
      <div className="text-black">
        <div className="rounded overflow-hidden flex  justify-center items-center">
          <table {...getTableProps()} class="GeneratedTable">
            <thead>
              {headerGroups.map((headerGroup) => (
                <tr {...headerGroup.getHeaderGroupProps()}>
                  {headerGroup.headers.map((column) => (
                    <th {...column.getHeaderGroupProps()}>
                      {column.render("Header")}
                    </th>
                  ))}
                </tr>
              ))}
            </thead>

            <tbody {...getTableBodyProps()}>
              {rows.map((row) => {
                prepareRow(row);
                return (
                  <tr {...row.getRowProps}>
                    {row.cells.map((cell) => {
                      return (
                        <td {...cell.getCellProps()}>{cell.render("Cell")}</td>
                      );
                    })}
                  </tr>
                );
              })}
            </tbody>
          </table>
        </div>
      </div>
    </div>
  );
};

export default ViewTcMapping;

这是 COLUMNS，其中包含每列的标题

export const COLUMNS = [
  {
    Header: "Cost",
    accessor: "cost_category",
  },
  {
    Header: "Path",
    accessor: "path",
  },
  {
    Header: "Threat Category (PK)",
    accessor: "threat_category",
  },
  {
    Header: "Threats (ISO)",
    accessor: "threats",
  },
  {
    Header: "Asset Type",
    accessor: "asset_type",
  },
  {
    Header: "Comment",
    accessor: "comment",
  },
  {
    Header: "Operational",
    accessor: "operational",
  },
  {
    Header: "Reputational",
    accessor: "reputational",
  },
  {
    Header: "Financial",
    accessor: "financial",
  },
  {
    Header: "Health and Safety",
    accessor: "health_and_safety",
  },
  {
    Header: "Environmental",
    accessor: "environment",
  },
];

这是我想要渲染到表中的 api json 数据

{
    "tc_mapping_details": [
        {
            "cost_category": "Malicious Attacks",
            "path": "Entry",
            "threat_category": "Phishing",
            "threats": "Social engineering",
            "asset_type": "User",
            "comment": "Phishing by itself may not cause a breach, unless it is in combination with middle and end activities. Loss event (Breach) is calculated per exposed path that leads to the end action. For the rest, loss can be treated merely as an incident",
            "operational": "I",
            "reputational": null,
            "financial": null,
            "health_and_safety": null,
            "environment": null
        },
        {
            "cost_category": "Malicious Attacks",
            "path": "Middle",
            "threat_category": "Ransom-ware",
            "threats": "Malicious code",
            "asset_type": "Email Properties",
            "comment": "Ransomware can't launch on it own. It needs an Entry point. It needs an End point for Extortion or Breach (For example, Data Tampering or Data Compromise resp,)..",
            "operational": "I",
            "reputational": "I",
            "financial": "I",
            "health_and_safety": null,
            "environment": null
        },
        {
            "cost_category": "Malicious Attacks",
            "path": "Middle",
            "threat_category": "Malicious Software (Malware, Virus etc.)",
            "threats": "Malicious code",
            "asset_type": "Server, Network",
            "comment": "Ransomware can't launch on it own. It needs an Entry point. It needs an End point for an Attack or Breach (For example, Data Tampering or Data Compromise resp,)..",
            "operational": "I",
            "reputational": null,
            "financial": null,
            "health_and_safety": null,
            "environment": null
        },
        {
            "cost_category": "Malicious Attacks",
            "path": "Middle",
            "threat_category": "Espionage",
            "threats": "Software espionage",
            "asset_type": null,
            "comment": null,
            "operational": "I",
            "reputational": null,
            "financial": "I",
            "health_and_safety": null,
            "environment": null
        },
        {
            "cost_category": "Malicious Attacks",
            "path": "Middle",
            "threat_category": "Espionage",
            "threats": "Industrial espionage",
            "asset_type": null,
            "comment": null,
            "operational": "I",
            "reputational": "I",
            "financial": "I",
            "health_and_safety": "I",
            "environment": "I"
        },
        {
            "cost_category": "Malicious Attacks",
            "path": "Entry",
            "threat_category": "Web Vulnerabilities",
            "threats": "Vulnerability",
            "asset_type": "Web Properties",
            "comment": null,
            "operational": "I",
            "reputational": null,
            "financial": "I",
            "health_and_safety": null,
            "environment": null
        },
        {
            "cost_category": "Malicious Attacks",
            "path": "Entry",
            "threat_category": "3rd Party Vulnerabilities (inc. Software)",
            "threats": "Vulnerability",
            "asset_type": null,
            "comment": null,
            "operational": "I",
            "reputational": "I",
            "financial": "I",
            "health_and_safety": null,
            "environment": null
        },
        {
            "cost_category": "Malicious Attacks",
            "path": "End",
            "threat_category": "Fraud",
            "threats": "Fraud",
            "asset_type": null,
            "comment": null,
            "operational": "B",
            "reputational": "B",
            "financial": "B",
            "health_and_safety": null,
            "environment": null
        },
       
    ]
}

如何修复TypeError：无法读取未定义的属性（读取“forEach”）？

谢谢

Answer 1

我为你找到了解决方案。我刚刚遇到了同样的问题。

在useTable钩子中，您必须通过，useTable({ columns, data: 'yourData' })因为 accessRowsforEach用于关键字data。