Angular ng-repeat conditional wrap items in element (group items in ng-repeat)

Question

I'm trying to group the items in a ng-repeat using a condition.

An example condition is to group all elements with the same hour.

The data:

[
    {name: 'AAA', time: '12:05'},
    {name: 'BBB', time: '12:10'},
    {name: 'CCC', time: '13:20'},
    {name: 'DDD', time: '13:30'},
    {name: 'EEE', time: '13:40'},
    ...
]

The 'time' field is actually a timestamp (1399372207) but with the exact time the example output is easier to understand.

I am listing these items using ng-repeat:

<div ng-repeat="r in data| orderBy:sort:direction">
   <p>{{r.name}}</p>
</div>

also tried with:

<div ng-repeat-start="r in data| orderBy:sort:direction"></div>
    <p>{{r.name}}</p>
<div ng-repeat-end></div>

A valid output is:

<div class="group-class">
    <div><p>AAA</p></div>
    <div><p>BBB</p></div>
</div>
<div class="group-class">
    <div><p>CCC</p></div>
    <div><p>DDD</p></div>
    <div><p>EEE</p></div>
</div>

My last option if there isn't a simple solution for my problem would be to group the data and then assign it to the scope variable used in ng-repeat.

Any thoughts?

Answer 1

You can use groupBy filter of angular.filter module.
so you can do something like this:

usage: collection | groupBy:property
use nested property with dot notation: property.nested_property
JS:

$scope.players = [
  {name: 'Gene', team: 'alpha'},
  {name: 'George', team: 'beta'},
  {name: 'Steve', team: 'gamma'},
  {name: 'Paula', team: 'beta'},
  {name: 'Scruath', team: 'gamma'}
];

HTML:

<ul ng-repeat="(key, value) in players | groupBy: 'team'">
  Group name: {{ key }}
  <li ng-repeat="player in value">
    player: {{ player.name }} 
  </li>
</ul>

RESULT:
Group name: alpha
* player: Gene
Group name: beta
* player: George
* player: Paula
Group name: gamma
* player: Steve
* player: Scruath

UPDATE: jsbin