d3.js - 未捕获的类型错误：无法读取未定义的属性“数据”

Question

我遇到了 2 个我无法弄清楚的错误...我正在尝试使用一些后端数据构建散点图。后端向我发送一个带有我需要的信息的 Javascript 对象 (tabularData)，我用它来创建一个图表。 我正在使用 ExtJS 4.2.2 和 d3.js 和 nv.d3.js 的最现代版本

第一个错误是一个未捕获的类型错误，似乎在抱怨 nv.d3.js

Uncaught TypeError: Cannot read property 'data' of undefined nv.d3.js:11193
(anonymous function) nv.d3.js:11193
attrFunction d3.js:597
(anonymous function) d3.js:884
d3_selection_each d3.js:890
d3_selectionPrototype.each d3.js:883
d3_selectionPrototype.attr d3.js:580
updateInteractiveLayer nv.d3.js:11192

第二个错误是与d3.js有关的错误

Error: Invalid value for <g> attribute transform="translate(NaN,5)" d3.js:591
attrConstant d3.js:591
(anonymous function) d3.js:884
d3_selection_each d3.js:890
d3_selectionPrototype.each d3.js:883
d3_selectionPrototype.attr d3.js:580
(anonymous function) nv.d3.js:5010
(anonymous function) d3.js:884
d3_selection_each d3.js:890
d3_selectionPrototype.each d3.js:883
chart nv.d3.js:4872
d3_selectionPrototype.call d3.js:897
(anonymous function) nv.d3.js:11818
(anonymous function) d3.js:8562
d3_selection_each d3.js:890
d3_transitionPrototype.each d3.js:8560
chart nv.d3.js:11729
d3_selectionPrototype.call d3.js:897
chart.update nv.d3.js:11738
window.onresize nv.d3.js:904
window.onresiz

我很确定它与 d3.select 有关，但它失败是没有意义的，因为 buildData 创建了一个合法的对象。我还认为可能是因为我的很多 x 值和 y 值是相同的，但使用 nvd3.org 上的live code scatter plot example 告诉我这不是原因。

这是我的实际代码供参考...

 buildScatterPlot: function buildScatterPlot(tabularData){
     Ext.vcops.chrome.D3js.load(function() {
        Ext.vcops.chrome.nvd3.load(function(){

            nv.addGraph(function() {
                var chart = nv.models.scatterChart()
                    .showDistX(false)    //showDist, when true, will display those little distribution lines on the axis.
                    .showDistY(false)
                    .transitionDuration(350)
                    .color(d3.scale.category20().range());

                //Configure how the tooltip looks.
                chart.tooltipContent(function(key) {
                    return '<h3>' + key + '</h3>';
                });

                //Axis settings
                var xAxisLabel = tabularData.columns[1].label;
                var yAxisLabel = tabularData.columns[2].label;
                var xFormat;
                var yFormat;
                var xUnitId = tabularData.columns[1].unit === null ? null : tabularData.columns[1].unit.unitId;
                var yUnitId = tabularData.columns[2].unit === null ? null : tabularData.columns[2].unit.unitId;
                switch(xUnitId){
                    case "percent":
                        xFormat = '.02%'
                        break;
                    case null:
                    default:
                        xFormat = 'd'
                        break;
                }
                switch(yUnitId){
                    case "percent":
                        yFormat = '.02%';
                        break;
                    case null:
                    default:
                        yFormat = 'd';
                        break;
                }
                chart.xAxis
                    .axisLabel(xAxisLabel)
                    .tickFormat(d3.format(xFormat));
                chart.yAxis
                    .axisLabel(yAxisLabel)
                    .tickFormat(d3.format(yFormat));

                var d3data = buildData(xUnitId, yUnitId);
                console.log(d3data);
                d3.select('#chart svg')
                    .datum(d3data)
                    .call(chart);
                nv.utils.windowResize(chart.update);

                return chart;
            });

            /**************************************
             * Data generator
             */
            function buildData(xUnitId, yUnitId) { //# groups,# points per group
                var data = [];
                var skipped = 0;
                for (var i = 0; i < tabularData.totalRowCount; i++) {
                    var xVal;
                    var yVal;
                    if(tabularData.rows[i].cells[2].renderedValue === "-"){
                        skipped++;
                        continue;
                    }
                    switch(xUnitId){
                        case "percent":
                            xVal = tabularData.rows[i].cells[1].value / 100.0;
                            break;
                        case null:
                            xVal = tabularData.rows[i].cells[1].value;
                            break;
                    }
                    if(tabularData.rows[i].cells[2].renderedValue === "-"){
                        skipped++;
                        continue;
                    }
                    switch(yUnitId){
                        case "percent":
                            yVal = tabularData.rows[i].cells[2].value / 100.0;
                            break;
                        case null:
                            yVal = tabularData.rows[i].cells[2].value;
                            break;
                    }
                    if(xVal === null || yVal === null){
                        continue;
                    }
                    console.log(xVal);
                    console.log(yVal);
                    data.push({
                        key: tabularData.rows[i].objectIdentifier.resourceKey.resourceName,
                        values: []
                    });
                    data[i-skipped].values.push({
                        x: xVal,
                        y: yVal,
                        size: Math.random()  //Configure the size of each scatter point
                    });
                }
                return data;
            };
        });
    });
}

Answer 1

对于我的问题，事实证明这与 d3.v3 不兼容。我使用的是 d3.v3，但 nvd3 的稳定版本使用的是 d3.v2： https://github.com/novus/nvd3/commit/7e9b8c013c4d8e8ad5775062c438c842bc112585

我通过包含 nvd3/lib 中提供的 d3.v2 版本解决了这个问题： https://github.com/novus/nvd3/blob/master/lib/d3.v2.min.js

在这里找到答案： https://stackoverflow.com/a/20994982/469594