reactjs - react /AG-GRID : Dynamically setting columnDefs after retrieving data

Question

在 componentDidMount() 函数中，我正在使用 AXIOS 检索数据，一旦接收到数据，我将尝试更改列 Header Names 我的 AG-GRID 在检索数据后，但 Header Names 不受影响。

请参阅以下代码中的 this.gridOptions.api.setColumnDefs(columnDefs) 行。

var columnDefs = [
    { headerName: "column0", field: "column0", width: 300 },
    { headerName: "column1", field: "column1", width: 100 },
    { headerName: "column2", field: "column2", width: 100 },
    { headerName: "column3", field: "column3", width: 100 },
    { headerName: "column4", field: "column4", width: 100 },
    { headerName: "column5", field: "column5", width: 100 },
];

var PARMS = '';

class Home extends React.Component {
    state = {
        columnDefs: columnDefs,
        header: {},
        isLoading: false,
        error: null
    }

    componentDidMount() {
        this.setState({ isLoading: true });

        axios.get(API + PARMS)
            .then(fubar => {
                const rowData = fubar.data.results;
                this.setState({ rowData });
                const headerRow = fubar.data.header;
                columnDefs[0].headerName = headerRow.column0;
                columnDefs[1].headerName = headerRow.column1;
                columnDefs[2].headerName = headerRow.column2;
                columnDefs[3].headerName = headerRow.column3;
                columnDefs[4].headerName = headerRow.column4;
                columnDefs[5].headerName = headerRow.column5;

                this.gridOptions.api.setColumnDefs(columnDefs);
            })
            .catch(error => this.setState({
                error,
                isLoading: false
            }));
    }

RENDER() 是:

render() {
    const { isLoading, rowData, columnDefs } = this.state;

    return (
        <div className="ag-theme-balham" style={{ height: '525px', width: '920px' }} >
            <h2>{heading}</h2>

            <AgGridReact
                columnDefs={columnDefs}
                rowData={rowData}>
            </AgGridReact>
        </div>

    );
}

我认为上面的代码在做什么(或试图做什么):

• 定义列定义
• 网格由列定义呈现
• 数据来源
• 重新定义列定义
• 网格正在(或应该)重新渲染

但这并没有发生。在我的完美世界中，我更愿意:

• 检索数据
• 定义列
• 渲染网格

但有人告诉我“那样不行”。

Answer 1

我的解决方案是对数组进行两个定义，一个设置为 STATE 对象，另一个设置为独立变量。当数据刷新时，独立变量被更新，然后用于替换 STATE 对象。

有没有更好的办法？

var columnDefsNew = [
    { headerName: "", field: "column0", width: 300, },
    { headerName: "", field: "column1", width: 100 },
    { headerName: "", field: "column2", width: 100 },
    { headerName: "", field: "column3", width: 100 },
    { headerName: "", field: "column4", width: 100 },
    { headerName: "", field: "column5", width: 100, }];

class Home extends Component {
    constructor(props) {
        super(props);

        this.state = {
            columnDefs: [
                { headerName: "", field: "column0", width: 300 },
                { headerName: "", field: "column1", width: 100 },
                { headerName: "", field: "column2", width: 100 },
                { headerName: "", field: "column3", width: 100 },
                { headerName: "", field: "column4", width: 100 },
                { headerName: "", field: "column5", width: 100 }],
            rowData: null,
            isLoading: false,
            error: null
        };
    }

    componentDidMount() {
        this.setState({ isLoading: true });

        axios.get(API + PARMS)
            .then(fubar => {
                const headerRow = fubar.data.header;
                const rowData = fubar.data.results;

                this.setState({ rowData });

                columnDefsNew[0].headerName = headerRow.column0;
                columnDefsNew[1].headerName = headerRow.column1;
                columnDefsNew[2].headerName = headerRow.column2;
                columnDefsNew[3].headerName = headerRow.column3;
                columnDefsNew[4].headerName = headerRow.column4;
                columnDefsNew[5].headerName = headerRow.column5;

                this.setState({ columnDefs: columnDefsNew });
            })
            .catch(error => this.setState({
                error,
                isLoading: false
            }));
    }

    render() {
        const { isLoading, rowData, columnDefs } = this.state;

        return (
            <div className="ag-theme-balham" style={{ height: '525px', width: '900px' }} >
                <h2>{heading}</h2>

                <AgGridReact
                    columnDefs={columnDefs}
                    rowData={rowData}>
                </AgGridReact>
            </div>

        );
    }
}

export default Home;