AngularJs, display function result in ui-grid - angularjs

Question

I am trying to sum two columns in a function then display their result in the ui grid. any ideas about how to do this, then save the ui grid content in the database?
see the picture
so in my case : a and b are binded from the database, while I want angularjs to calculate their sum and add it in the column "Quantite reelle".
this is my grid code $scope.gridOptions = {
showGridFooter: true,
onRegisterApi: function (gridApi) {
$scope.gridApi = gridApi;
gridApi.core.on.renderingComplete($scope, function () {
$timeout(function () {
var gridBodyElem = document.getElementById(gridApi.grid.id + '-grid-container');
gridApi.grid.element.on('mouseup', handleGridClick);
});
});
}
};
$scope.gridOptions.columnDefs = [
{ name: 'Num', enableHiding: false, enableColumnMenu: false, enableCellEdit: false, width: '5%' },
{ name: 'CodeArticle', enableHiding: false, enableColumnMenu: false, displayName: 'Code Article ', width: '10%' },
{ name: 'Ref', enableHiding: false, enableColumnMenu: false, displayName: 'Référence ', width: '10%' },
{ name: 'Designation', enableHiding: false, enableColumnMenu: false, displayName: 'Désignation ', width: '30%' },
{ name: 'Stock', enableHiding: false, enableColumnMenu: false, displayName: "Qté théorique (a)", width: '13%' },
{ name: "ajust", enableHiding: false, enableColumnMenu: false, displayName: "Ajustement (b)", width: '12%' },
{ name: "sum", enableHiding: false, enableColumnMenu: false, displayName: "Quantité Réelle(a+b)", width: '14%' },
{ name: "motif", enableHiding: false, enableColumnMenu: false, displayName: "Motif", width: '20%' }
];
`
thank you guys.

Answer 1

You need to set column field property to expression.
$scope.gridOptions.columnDefs = [
{ name: "sum", enableHiding: false, enableColumnMenu: false, field:'CalculateSum(a,b)', displayName: "Quantité Réelle(a+b)", width: '14%' }
];
Here a & b are respective column names.

Answer 2

You can try this:
$scope.gridApi.grid.columns[column a].getAggregationValue() +
$scope.gridApi.grid.columns[column b].getAggregationValue()

Answer 3

$scope.gridOptions.columnDefs = [
{ name: 'Num', enableHiding: false, enableColumnMenu: false, enableCellEdit: false, width: '5%' },
{ name: 'CodeArticle', enableHiding: false,field:'CodeArticle', enableColumnMenu: false, displayName: 'Code Article ', width: '10%' },
{ name: 'Ref', enableHiding: false,enableColumnMenu: false, displayName: 'Référence ', width: '10%' },
{ name: 'Designation', enableHiding: false, enableColumnMenu: false, displayName: 'Désignation ', width: '30%' },
{ name: 'Stock', enableHiding: false,field:'Stock', enableColumnMenu: false, displayName: "Qté théorique (a)", width: '13%' },
{ name: "ajust", enableHiding: false, field: 'ajust', enableColumnMenu: false, displayName: "Ajustement (b)", width: '12%' },
{ name: "sum", enableHiding: false, enableColumnMenu: false, field: 'CalculateSum(ajust,Stock)', displayName: "Quantité Réelle(a+b)", width: '14%' },
{ name: "motif", enableHiding: false, enableColumnMenu: false, displayName: "Motif", width: '20%' }
];
$scope.CalculateSum = function (ajust, Stock) {
return ajust + Stock;
};

Answer 4

Following Tutorial: 323 More Binding examples I created a Plunker, using a filter calculateSum to calculate the sum of both fields.
angular.module('app', ['ngAnimate', 'ngTouch', 'ui.grid'])
.controller('MainCtrl', MainCtrl)
.filter('calculateSum', function () {
return function (input, a, b) {
return input[a]+input[b];
};
});;
MainCtrl.$inject = ['$http', 'uiGridConstants'];
function MainCtrl($http, uiGridConstants) {
var vm = this;
vm.gridOptions = {
enableFiltering: true,
onRegisterApi: function(gridApi){
vm.gridApi = gridApi;
},
columnDefs: [
{ field: 'name'},
{ field: 'num1'},
{ field: 'num2'},
{ name: 'sum', field: uiGridConstants.ENTITY_BINDING, cellFilter: 'calculateSum:"num1":"num2"' }
]
};
$http.get('https://cdn.rawgit.com/angular-ui/ui-grid.info/gh-pages/data/500_complex.json')
.then(function(response) {
response.data.forEach(function(row){
row.num1 = row.age;
row.num2 = row.age*2;
});
vm.gridOptions.data = response.data;
});
}