Question

我需要显示组行中组中的第一个值，所以首先我尝试使用聚合显示常量，我有这个列def

     name: 'Stack',
    displayName: 'Stack',
    grouping: { groupPriority: 1 },
    treeAggregation: { type:this.uiGridGroupingConstants.aggregation.CUSTOM },
    customTreeAggregationFn: this.aggregateService.accumulateNumValue,
    customTreeAggregationFinalizerFn: this.aggregateService.medianFinalize,
    visible: true,
    minWidth: '70',

使用另一个隐藏的列完成分组，我尝试使用自定义aggregationTree和finalize方法仅执行

        if ( angular.isUndefined(aggregation.stats.accumulator) ){
            aggregation.stats.accumulator = [];
        }

这段代码抛出错误

 TypeError: Cannot read property 'accumulator' of undefined
at GridColumn.AggregationService.medianFinalize [as customTreeAggregationFinalizerFn] (http://localhost:8080/bundle.js:135388:55)
at Object.finaliseAggregation (http://localhost:8080/bundle.js:74042:28)
at http://localhost:8080/bundle.js:74073:20
at Array.forEach (native)
at Object.finaliseAggregations (http://localhost:8080/bundle.js:74072:36)
at createNode (http://localhost:8080/bundle.js:73647:24)
at Array.forEach (native)
at Object.createTree (http://localhost:8080/bundle.js:73679:25)
at Grid.treeRows (http://localhost:8080/bundle.js:73544:39)
at startProcessor (http://localhost:8080/bundle.js:52026:34)

我不明白这是怎么抛出错误的，我删除了3行代码并且错误不再存在但我显然需要访问tats.accumulator，因为这是我在聚合中推送数据的数组功能

Answer 1

你试过了吗？

    if ( angular.isUndefined(aggregation.stats) ){ 
aggregation.stats={accumulator : []};
}

Answer 2

我能够解决问题是聚合函数而不是终结函数的问题，在我的聚合服务中我有这个函数

 public accumulateNumValue (aggregation, fieldValue, value) {

        if (angular.isUndefined(aggregation.stats) ){
            aggregation.stats = {sum: 0};
        }
        if ( angular.isUndefined(aggregation.stats.accumulator) ){
            aggregation.stats.accumulator = [];
        }

        aggregation.stats.accumulator.push(value);

    }

我正在推动值而不是fieldValue，我刚刚开始推动字段值，累积功能现在正常工作。

     public accumulateNumValue (aggregation, fieldValue, value) {

        if (angular.isUndefined(aggregation.stats) ){
            aggregation.stats = {sum: 0};
        }
        if ( angular.isUndefined(aggregation.stats.accumulator) ){
            aggregation.stats.accumulator = [];
        }

        aggregation.stats.accumulator.push(fieldValue);

    }

并显示组中的第一个元素，你需要在终结器函数中分配＆＃34; aggregation.rendered＆＃34;到数组的第一个元素

     public medianFinalize(aggregation) {
        if (angular.isUndefined(aggregation.stats) ) {
            aggregation.stats={accumulator : []};
        }
        if(aggregation.stats.accumulator.length >0) {

            aggregation.rendered = aggregation.stats.accumulator[0];
        }
    }

angular ui grid grouping显示组行

2 个答案: