angular.js ng-repeat - check if conditional is true then use another collection

javascript angularjs if-statement angularjs-ng-repeat ng-repeat

30,458

Solution 1

Try this ...

In your controller

$scope.getDataSource=function(condition){

  if(condition){ return dataSource1; }
  return dataSource2;
};

In your Html

ng-repeat="book in getDataSource(/*condition*/)

MVVM Pattern advises to put our logic always in the controller and not in the view(HTML). If you ever find yourself adding "logic" in your view probably there is an alternate "better" way to do it.

But just for "fun" you can do this too:

ng-repeat="book in {true: adultBooks, false: childBooks}[list==='adultBooks']"

Like this:

<li ng-repeat="book in {true: childBooks, false:adultBooks}[list==='childBooks']">{{book.name}

Here is the full sample:

http://jsbin.com/diyefevi/5/edit?html,js,output

Solution 2

The simplest solutions I can think of would be to define a new array on the scope which you set the other arrays to when you need.

E.g. http://jsbin.com/diyefevi/4/edit?html,js,output

Solution 3

Something like this would eliminate the need for ng-switch:

<!DOCTYPE html>
<html ng-app="test">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.14/angular.min.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body ng-controller="MainCtrl">
  <a href="" ng-click="toggleList()">Toggle List</a>
  <h1>{{list}}</h1>
  <ul>
      <li ng-repeat="book in getBooks()">{{book.name}}</li>
  </ul>
</body>
</html>

and the js:

var app = angular.module('test', []);
app.controller('MainCtrl', function ($scope) {
  $scope.list = 'childBooks';

  $scope.childBooks = [{name: 'Dodobird'}, {name: 'Catty Red Hat'}];

  $scope.adultBooks = [{name: 'Little Lady'}, {name: 'Johny Doe'}];

  $scope.toggleList = function () {
    $scope.list = $scope.list === 'childBooks' ? 'adultBooks' : 'childBooks';
  };

  $scope.getBooks = function() {
    if($scope.list == 'adultBooks') {
      return $scope.adultBooks;
    } else {
      return $scope.childBooks;
    }
  }
});

Here is the jsbin code

30,458

Author by

Kosmetika

#SOreadytohelp

Updated on July 22, 2022

Comments

Kosmetika almost 2 years

I'm wondering is it possible to check what collection to use inside ng-repeat?

For example, in my controller I have 2 arrays of data fetched from server, now I use ng-switch to switch between them, check this jsbin - http://jsbin.com/diyefevi/1/edit?html,js,output

The problem is that these li views in my real application are big but very similar.. so I really would like to use 1 ng-repeat instead of 2.

So I wonder if something like ng-repeat="book in if list==='adultBooks' adultBooks else childBooks" is possible in Angular?

Thanks!
Raydot almost 9 years

Depends, doesn't it? I mean if the view will always consistently apply the same logic...
Dalorzo almost 9 years

@DaveKaye not on this question, it may depend if this solution is applied on other scenarios but not on this one.