如何遍歷對象數組並將每個對象顯示在圖表中？

Question

我正在嘗試使用React創建一個儀表板，第一部分顯示了我的本地API數據。 這是使用ComponentDidMount從前端獲取的，並使用splice僅使用METRIC = SPEND。 我試圖僅獲取此數據的第一個對象，並使用PRODUCT和UPLIFT創建圖表。 Google圖表需要此類數據https://react-google-charts.com/bar-chart#basic-bar-chart-with-multiple-series

關於如何執行此操作的任何想法？ 我試圖映射到數組，但是正如您在代碼的最后一部分中所看到的那樣，它正在數組上循環並創建3個圖表，而不是將所有數據放入1個圖表中。

我正在使用react-google-charts創建我的圖表。

  "error": false,
  "data": [
    {
      "id": 1,
      "METRIC": "Spend",
      "PRODUCT": "Offer",
      "EXPOSED": 62717.14,
      "CONTROL": 56355.78,
      "UPLIFT": 6361.36,
      "PCT_UPLIFT": 0.11
    },
    {
      "id": 2,
      "METRIC": "Spend",
      "PRODUCT": "Brand",
      "EXPOSED": 1037739.72,
      "CONTROL": 979580.56,
      "UPLIFT": 58159.16,
      "PCT_UPLIFT": 0.06
    },
    {
      "id": 3,
      "METRIC": "Spend",
      "PRODUCT": "Aisle",
      "EXPOSED": 4084428.18,
      "CONTROL": 3880807.25,
      "UPLIFT": 203620.93,
      "PCT_UPLIFT": 0.05
    },
    {
      "id": 4,
      "METRIC": "Units",
      "PRODUCT": "Offer",
      "EXPOSED": 25117.02,
      "CONTROL": 22537.94,
      "UPLIFT": 2579.08,
      "PCT_UPLIFT": 0.11
    },
    {
      "id": 5,
      "METRIC": "Units",
      "PRODUCT": "Brand",
      "EXPOSED": 506365.64,
      "CONTROL": 479277.36,
      "UPLIFT": 27088.28,
      "PCT_UPLIFT": 0.06
    },
    {
      "id": 6,
      "METRIC": "Units",
      "PRODUCT": "Aisle",
      "EXPOSED": 1771305.29,
      "CONTROL": 1682430.67,
      "UPLIFT": 88874.62,
      "PCT_UPLIFT": 0.05
    },
    {
      "id": 7,
      "METRIC": "Visits",
      "PRODUCT": "Offer",
      "EXPOSED": 22661.99,
      "CONTROL": 20480.76,
      "UPLIFT": 2181.23,
      "PCT_UPLIFT": 0.11
    },
    {
      "id": 8,
      "METRIC": "Visits",
      "PRODUCT": "Brand",
      "EXPOSED": 413568.96,
      "CONTROL": 391852.96,
      "UPLIFT": 21716,
      "PCT_UPLIFT": 0.06
    },
    {
      "id": 9,
      "METRIC": "Visits",
      "PRODUCT": "Aisle",
      "EXPOSED": 1220181.72,
      "CONTROL": 1161775.92,
      "UPLIFT": 58405.8,
      "PCT_UPLIFT": 0.05
    },
    {
      "id": 10,
      "METRIC": "Total_custs",
      "PRODUCT": "Offer",
      "EXPOSED": 15827,
      "CONTROL": 14346.53,
      "UPLIFT": 1480.47,
      "PCT_UPLIFT": 0.1
    },
    {
      "id": 11,
      "METRIC": "Total_custs",
      "PRODUCT": "Brand",
      "EXPOSED": 301593,
      "CONTROL": 282900.38,
      "UPLIFT": 18692.62,
      "PCT_UPLIFT": 0.07
    },
    {
      "id": 12,
      "METRIC": "Total_custs",
      "PRODUCT": "Aisle",
      "EXPOSED": 795653,
      "CONTROL": 749896.76,
      "UPLIFT": 45756.24,
      "PCT_UPLIFT": 0.06
    }
  ],
  "message": "top table"
}


import React from 'react';
import { Chart } from 'react-google-charts';
import './App.css';

class App extends React.Component {
  constructor() {
    super();
    this.state = {
      top_spend: []
    }
  }
  componentDidMount() {
    fetch('http://localhost:3000/top')
      .then(response => response.json())
      .then(data => {
        this.setState({top_spend: data.data.splice(0,3)}, () => {
          console.log("Top_Spend", this.state.top_spend);
        })
      })
  }
  render() {
    let top = this.state.top_spend;

    return (
      <div className="App">
        {top.map(function(name, index) {
          return (
            <div key={index}>
              <Chart
                height={'300px'}
                width={'400px'}
                chartType="Bar"
                loader={<div>Loading Chart</div>}
                data={[
                  ['', 'UPLIFT', 'PCT_UPLIFT'],
                  [name.PRODUCT, name.UPLIFT, name.PCT_UPLIFT],
                ]}
                options={{
                  chart: {
                    title: 'Company',
                  },
                  chartArea: {width: '50%'},
                  isStacked: true,
                }}
              />
            </div>
          )
        })}
      </div>
    );
  }
}

export default App;

Answer 1

因此，這里的問題是您要遍歷data ，從而在我理解正確的情況下想要將所有內容合並到一個圖表中時為每個條目創建一個圖表。 因此，與其直接遍歷數據，不如遍歷傳遞給Chart的prop中的數據。 所以代碼看起來像這樣

<Chart
  data={[
    ['', 'UPLIFT', 'PCT_UPLIFT'],
    ...data.map(d => [ d.PRODUCT, d.UPLIFT, d.PCT_UPLIFT ])
  ]}
/>