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我正在使用amCharts通過dataLoader功能提取數據來生成圖表等。amCharts:如何優雅地管理dataLoader中的數據缺失
我一直在研究如何優雅地處理從API不時傳遞的數據缺失問題,以便圖形顯示諸如「無數據可用」之類的消息。
示例圖表代碼:
var chart = new AmCharts.AmSerialChart();
chart.dataLoader = { url: "/api/blobs"};
chart.categoryField = "site";
chart.type="serial";
chart.theme = "light";
var graph = new AmCharts.AmGraph();
graph.valueField = "visit";
graph.type = "column";
graph.fillAlphas = 1;
graph.lineAlpha = 0;
var valuesAxis = new AmCharts.ValueAxis();
valuesAxis.integersOnly = true;
graph.balloonText = "[[category]]: <b>Total: [[value]]</b>";
chart.depth3D = 45;
chart.angle = 45;
chart.addGraph(graph);
chart.addValueAxis(valuesAxis);
chart.write("blob_chart");
任何人都有一個線索,我怎麼能管理檢查的DataLoader返回null,如果是這樣寫計劃「無可用數據」的圖表,而不是嗎?
的伎倆,謝謝 – Aeseir