AngularJS : How to get the unique values in ng-option?

Question

I have the following data in a table:

data = [
  {id: 1, name: 'Manchester United', type: 'Soccer', featured: true, country: 'England'},
  {id: 2, name: 'Manchester City', type: 'Soccer', featured: false, country: 'England'},
  {id: 3, name: 'Dallas Mavericks', type: 'Basketball', featured: true, country: 'USA'},
  {id: 4, name: 'Indian Cricket Team', type: 'Cricket', featured: true, country: 'India'},
  {id: 5, name: 'Australian Cricket Team', type: 'Cricket', featured: false, country: 'Australia'},
  {id: 6, name: 'Los Angeles Lakers', type: 'Basketball', featured: true, country: 'USA'},
  {id: 7, name: 'Los Angeles Clippers', type: 'Basketball', featured: false, country: 'USA'}
];

I want to add a drop down box with countries. Selecting a country should filter the table to show only sports from that country.

The problem is that I am unable to show the unique countries in the dropdown.

Kindly Help...Thanks in advance.

Try to obtain a list of countries from your data with a plain old JavaScript function, and then just put this function in your controller. — Blackhole
– Blackhole, Commented Jul 18, 2014 at 19:17
I am using the following code : <select data-ng-model="countryModel" ng-options="dd.country for dd in data | unique: data.country"> <option value="">--Choose Country--</option> </select> I was thinking of using a filter (for e.g. 'unique') , how to create a filter is a problem :( — Vaibhav Pachauri
– Vaibhav Pachauri, Commented Jul 18, 2014 at 19:20
I was thinking of creating a filter, but unable to do that :( — Vaibhav Pachauri
– Vaibhav Pachauri, Commented Jul 18, 2014 at 19:21
Using a filter here is plain wrong. Loop through data once and build the list of unique countries. — Sergiu Paraschiv
– Sergiu Paraschiv, Commented Jul 18, 2014 at 19:23
This is a bit offtopic, this is a javascript question and not an angular question. Try using from javascript libraries like lowdash to preprocess your data. — Alex C
– Alex C, Commented Jul 18, 2014 at 19:24

Community · Accepted Answer · 2017-05-23 12:29:46Z

2

I modified your plnkr, http://plnkr.co/edit/60GO0zhSGoEUm7tu6mbc?p=preview

Filter: as it is from ng-options and unique filter not displaying angular.js

Select part: <select data-ng-model="countryModel" ng-options="dd.country as dd.country for dd in data | unique:'country'">

ng-repeat part <tr data-ng-repeat="dat in data | filter: countryModel" data-ng-style="set_color(dat)">

edited May 23, 2017 at 12:29

CommunityBot

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answered Jul 18, 2014 at 20:14

allenhwkim

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