When the data source is the hierarchical, it could config a formula for the data field in the schema, and the formula only be invoked when the record has the children,
It means both of the value from the record that be parent is summarized and the value from the record that be children are in the one field when retrieving.
The hierarchy summary field options:
The sample of the config the hierarchy summary fields:
The Built-in Formulas
The built-in formulas could be used in the hierarchy summary fields or in the calculation column when it’s in the hierarchy:
CHILDREN
This formula is for retrieving the value that be specified by [fieldName] of the children that be [levelOffset] steps away from the parent.
If the level offset is bigger than the interval between current record and the lowest children, the values be from the children that be not parent.
ONLYCHILDREN
This formula is for retrieving the value that be specified by [fieldName] of the children that be not parent.
PARENT
This formula is for retrieving the value that be specified by [fieldName] of the parent that be [levelOffset] steps away from the current record.
If the level offset is bigger than the interval between the current record and the highest parent, the value be from the highest parent, however if the current record be the highest parent, nothing could be retrieved.
LEVEL
This formula is for retrieving the level of the current record.
LEVELROWNUMBER
This formula is for retrieving the row number of the current record under the parent scope.
window.onload = function() {
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initSpread(spread);
};
function initSpread(spread) {
spread.options.autoFitType = GC.Spread.Sheets.AutoFitType.cellWithHeader;
spread.clearSheets();
var dataManager = spread.dataManager();
initHierarchyFormulas(spread, dataManager);
}
function initHierarchyFormulas(spread, dataManager) {
var table = dataManager.addTable("Table", {
remote: {
read: {
url: getBaseApiUrl() + "/Hierarchy_Formula"
}
},
schema: {
hierarchy: {
type: 'Parent',
column: 'parent',
summaryFields: {
'budget':'=SUM(CHILDREN(1,"budget"))'
}
},
columns: {
id: {
isPrimaryKey: true,
},
},
}
});
var sheet = spread.addSheetTab(0, "HierarchyFormula", GC.Spread.Sheets.SheetType.tableSheet);
sheet.setDefaultRowHeight(40, GC.Spread.Sheets.SheetArea.colHeader);
sheet.options.allowAddNew = false;
table.fetch().then(function () {
var myView = table.addView("myView", [
{ value: '=CONCAT([@department]," (L",LEVEL(),"-",LEVELROWNUMBER(),")")', caption: 'Department', width: 265, outlineColumn: true },
{ value: "budget", width: 100, caption: 'Budget' },
{ value: '=IF(LEVEL()=0,"",[@budget]/PARENT(1,"budget"))', width: 120, caption: 'Percentage', style: { formatter: '0.00%' } },
{ value: "location", width: 100, caption: 'Location' },
{ value: "phone", width: 150, caption: 'Phone' },
{ value: "country", width: 100, caption: 'Country' },
]);
spread.suspendPaint();
sheet.setDataView(myView);
spread.resumePaint();
});
}
function _getElementById(id) {
return document.getElementById(id);
}
function getBaseApiUrl() {
return window.location.href.match(/http.+spreadjs\/demos\//)[0] + 'server/api';
}
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