显示一个弹出窗口，其中包含来自 react.js 中的一个表的元素及其总数的信息

Question

我正在用 React.Js 开发一个应用程序。

我有数组：

array = [
  {
    "id": 1,
    "date": {
      "id": 1,
      "name": "202001"
    },
    "item": {
      "id": 1,
      "name": "I1"
    },
    "price": 100
    },
    {
    "id": 2,
    "date": {
      "id": 2,
      "name": "202002"
    },
    "item": {
      "id": 1,
      "name": "I1"
    },
    "price": 200
  },
  {
    "id": 3,
    "date": {
      "id": 2,
      "name": "202002"
    },
    "item": {
      "id": 2,
      "name": "I2"
    },
    "price": 300
  },
]

而我显示的数据如表所示：

ITEM	202001	202002	TOTAL
I1	100	200	300
I2	-	300	300
TOTAL	100	500	600

我这样做是为了获得这些值：

items_dicc = array.reduce((acc, e) => {
    if (!acc[e["item"]["name"]]) {
      acc[e["item"]["name"]] = {
        [e["date"]["name"]]: e["price"]
      }
    } else {
      acc[e["item"]["name"]][e["date"]["name"]] = e["price"]
    }
    return acc
  }, {})

dates = [...new Set(Object.keys(items_dicc).map(i => Object.keys(items_dicc[i])).flat())]

totalSumPerDate = {};

dates.forEach(date => {
  const sumOnDate = Object.values(items_dicc).reduce((acc, curr) => {
    acc = acc + (curr[date]? curr[date] : 0);
    return acc;
  }, 0);
  totalSumPerDate[[date]] = sumOnDate;
});

totalSum = Object.values(totalSumPerDate).reduce((acc, curr) => acc+curr, 0);

sumPerItem = {};

Object.keys(items_dicc).forEach(key => {
   const sum = Object.values(items_dicc[key]).reduce((acc, curr) => acc + curr, 0);
   sumPerItem[[key]] = sum;
});


<table>
  <thead>
    <tr>
      <th>ITEM</th>
      {dates.map(date => <th>{date}</th>)}
      <th>TOTAL</th>
    </tr>
  </thead>
  <tbody>
  {
    Object.keys(items_dicc).map((item) => {
      return (
        <tr>
          <td>{item}</td>
          {dates.map((date) => <td>{items_dicc[item][date] || ''}</td>)}
          <td>{sumPerItem[item]}</td>
        </tr>
      )
    })
  }
    <tr>
      <td>TOTAL</td>
        {Object.values(totalSumPerDate).map(item => <td>{item}</td>)}
      <td>{totalSum}</td>
    </tr>
  </tbody>
</table>

我需要能够通过弹出窗口显示数组可能包含的其他数据（例如 id）。

我知道要做到这一点，有必要在组件中创建一个本地状态，以便在单击所选记录时更新详细信息并将状态传递给模式。

它还应该能够引入总计信息。

我该怎么做，建议？

Answer 1

您可以像这样将总数据传递给 onClickEventHandler，

    <tr onClick={(event) => yourHandler(event, item, sumPerItem[item])}>
      <td>{item}</td>
      {dates.map((date) => <td>{items_dicc[item][date] || ''}</td>)}
      <td>{sumPerItem[item]}</td>
    </tr>

事件处理程序应该这样写，

yourHandler = (event, currentItem, totalForRow) => {
    // You update the state here 
}

此方法适用于整行。如果您想在每个单元格上显示不同的数据，您需要在元素上添加 eventHandler 并根据需要更新方法参数。

Answer 2

试试这个方法，

您必须为表格行的选定记录创建本地状态并将其传递给模态组件。单击表格行时更新所选记录。

import React, { useState } from "react";
import "./styles.css";
import "bootstrap/dist/css/bootstrap.min.css";

const array = [
  {
    id: 1,
    date: {
      id: 1,
      name: "202001"
    },
    item: {
      id: 1,
      name: "I1"
    },
    price: 100
  },
  {
    id: 2,
    date: {
      id: 2,
      name: "202002"
    },
    item: {
      id: 1,
      name: "I1"
    },
    price: 200
  },
  {
    id: 3,
    date: {
      id: 2,
      name: "202002"
    },
    item: {
      id: 2,
      name: "I2"
    },
    price: 300
  }
];

export default function App() {
  const [show, setShow] = useState(false);
  const [selectedData, setSelectedData] = useState({});
  const hanldeClick = (selectedId) => {
    const selectedRec = array.find((val) => val.item.name === selectedId);
    setSelectedData(selectedRec);
    setShow(true);
  };

  const hideModal = () => {
    setShow(false);
  };
  const items_dicc = array.reduce((acc, e) => {
    if (!acc[e["item"]["name"]]) {
      acc[e["item"]["name"]] = {
        [e["date"]["name"]]: e["price"]
      };
    } else {
      acc[e["item"]["name"]][e["date"]["name"]] = e["price"];
    }
    return acc;
  }, {});

  const dates = [
    ...new Set(
      Object.keys(items_dicc)
        .map((i) => Object.keys(items_dicc[i]))
        .flat()
    )
  ];

  const totalSumPerDate = {};

  dates.forEach((date) => {
    const sumOnDate = Object.values(items_dicc).reduce((acc, curr) => {
      acc = acc + (curr[date] ? curr[date] : 0);
      return acc;
    }, 0);
    totalSumPerDate[[date]] = sumOnDate;
  });

  const totalSum = Object.values(totalSumPerDate).reduce(
    (acc, curr) => acc + curr,
    0
  );

  const sumPerItem = {};

  Object.keys(items_dicc).forEach((key) => {
    const sum = Object.values(items_dicc[key]).reduce(
      (acc, curr) => acc + curr,
      0
    );
    sumPerItem[[key]] = sum;
  });

  return (
    <>
      <table>
        <thead>
          <tr>
            <th>ITEM</th>
            {dates.map((date) => (
              <th>{date}</th>
            ))}
            <th>TOTAL</th>
          </tr>
        </thead>
        <tbody>
          {Object.keys(items_dicc).map((item) => {
            return (
              <tr onClick={() => hanldeClick(item)}>
                <td>{item}</td>
                {dates.map((date) => (
                  <td>{items_dicc[item][date] || ""}</td>
                ))}
                <td>{sumPerItem[item]}</td>
              </tr>
            );
          })}
          <tr>
            <td>TOTAL</td>
            {Object.values(totalSumPerDate).map((item) => (
              <td>{item}</td>
            ))}
            <td>{totalSum}</td>
          </tr>
        </tbody>
      </table>
      {show && <Modal details={selectedData} handleClose={hideModal} />}
    </>
  );
}

const Modal = ({ handleClose, details }) => {
  console.log(details);
  return (
    <div className="modal display-block">
      <section className="modal-main">
        <div className="App">
          <table class="table">
            <thead>
              <tr>
                <th scope="col">ITEM</th>
                <th scope="col">ID</th>
                <th scope="col">DATE</th>
                <th scope="col">PRICE</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>{details?.item?.name}</td>
                <td>{details?.item?.id}</td>
                <td>{details?.date?.name}</td>
                <td>{details?.price}</td>
              </tr>
            </tbody>
          </table>
        </div>
        <button onClick={handleClose}>close</button>
      </section>
    </div>
  );
};

工作代码 - https://codesandbox.io/s/adoring-moore-rsn97?file=/src/App.js:0-3665