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orderBy multiple fields in Angular

Posted by: admin November 2, 2017 Leave a comment

Questions:

How to sort by using multiple fields at same time in angular? fist by group and then by sub-group
for Example

$scope.divisions = [{'group':1,'sub':1}, {'group':2,'sub':10}, {'group':1,'sub':2},{'group':1,'sub':20},{'group':2,'sub':1},
    {'group':2,'sub':11}];

I wanted to display this as

group : Sub-group

1 – 1

1 – 2

1 – 20

2 – 1

2 – 10

2 – 11

<select ng-model="divs" ng-options="(d.group+' - '+d.sub) for d in divisions | orderBy:'group' | orderBy:'sub'" />
Answers:

Please see this:

http://jsfiddle.net/JSWorld/Hp4W7/32/

<div ng-repeat="division in divisions | orderBy:['group','sub']">{{division.group}}-{{division.sub}}</div>

Questions:
Answers:

If you wants to sort on mulitple fields inside controller use this

$filter('orderBy')($scope.property_list, ['firstProp', 'secondProp']);

See also https://docs.angularjs.org/api/ng/filter/orderBy

Questions:
Answers:
<select ng-model="divs" ng-options="(d.group+' - '+d.sub) for d in divisions | orderBy:['group','sub']" />

User array instead of multiple orderBY

Questions:
Answers:

Sorting can be done by using ‘orderBy’ filter in angular.

Two ways:
1. From view
2. From controller

  1. From view

Syntax:

{{array | orderBy : expression : reverse}} 

For example:

 <div ng-repeat="user in users | orderBy : ['name', 'age'] : true">{{user.name}}</div>
  1. From controller

Syntax:

$filter.orderBy(array, expression, reverse);

For example:

$scope.filteredArray = $filter.orderBy($scope.users, ['name', 'age'], true);

Questions:
Answers:

There are 2 ways of doing AngularJs filters, one in the HTML using {{}} and one in actual JS files…

You can solve you problem by using :

{{ Expression | orderBy : expression : reverse}}

if you use it in the HTML or use something like:

$filter('orderBy')(yourArray, yourExpression, reverse)

The reverse is optional at the end, it accepts a boolean and if it’s true, it will reverse the Array for you, very handy way to reverse your Array…

Questions:
Answers:

I wrote this handy piece to sort by multiple columns / properties of an object. With each successive column click, the code stores the last column clicked and adds it to a growing list of clicked column string names, placing them in an array called sortArray. The built-in Angular “orderBy” filter simply reads the sortArray list and orders the columns by the order of column names stored there. So the last clicked column name becomes the primary ordered filter, the previous one clicked the next in precedence, etc. The reverse order affects all columns order at once and toggles ascending/descending for the complete array list set:

<script>
    app.controller('myCtrl', function ($scope) {
        $scope.sortArray = ['name'];
        $scope.sortReverse1 = false;
        $scope.searchProperty1 = '';
        $scope.addSort = function (x) {
            if ($scope.sortArray.indexOf(x) === -1) {
                $scope.sortArray.splice(0,0,x);//add to front
            }
            else {
                $scope.sortArray.splice($scope.sortArray.indexOf(x), 1, x);//remove
                $scope.sortArray.splice(0, 0, x);//add to front again
            }
        };
        $scope.sushi = [
        { name: 'Cali Roll', fish: 'Crab', tastiness: 2 },
        { name: 'Philly', fish: 'Tuna', tastiness: 2 },
        { name: 'Tiger', fish: 'Eel', tastiness: 7 },
        { name: 'Rainbow', fish: 'Variety', tastiness: 6 },
        { name: 'Salmon', fish: 'Misc', tastiness: 2 }
        ];
    });
</script>
<table style="border: 2px solid #000;">
<thead>
    <tr>
        <td><a href="#" ng-click="addSort('name');sortReverse1=!sortReverse1">NAME<span ng-show="sortReverse1==false">▼</span><span ng-show="sortReverse1==true">▲</span></a></td>
        <td><a href="#" ng-click="addSort('fish');sortReverse1=!sortReverse1">FISH<span ng-show="sortReverse1==false">▼</span><span ng-show="sortReverse1==true">▲</span></a></td>
        <td><a href="#" ng-click="addSort('tastiness');sortReverse1=!sortReverse1">TASTINESS<span ng-show="sortReverse1==false">▼</span><span ng-show="sortReverse1==true">▲</span></a></td>
    </tr>
</thead>
<tbody>
    <tr ng-repeat="s in sushi | orderBy:sortArray:sortReverse1 | filter:searchProperty1">
        <td>{{ s.name }}</td>
        <td>{{ s.fish }}</td>
        <td>{{ s.tastiness }}</td>
    </tr>
</tbody>
</table>

Questions:
Answers:

Make sure that the sorting is not to complicated for the end user. I always thought sorting on group and sub group is a little bit complicated to understand. If its a technical end user it might be OK.