AngularJS Search Array

Question

I have an array of objects in my controller, for example:

$scope.fields = [
    {fieldName:'houseNum',fieldLabel:'House Number',disabled:false},
    {fieldName:'street',fieldLabel:'Street',disabled:false},
    {fieldName:'city',fieldLabel:'City',disabled:true},
    {fieldName:'state',fieldLabel:'State',disabled:true},
]

In HTML, I would like to get the field fieldLabel, where fieldName == 'street'. The AJS documentation assumes that each filter case should be in the ng-repeat context - but not so in my case, as I am just trying to tear out one "fieldLabel" from the "fields" array based on "fieldName"

for example: HTML

{{ fieldLabel in fields | filter : {fieldName:'street'} : true}}

How can I do something like this work - or do I need to create my own directive and pass the $ scope.fields to the directive and execute the loop manually?

Answer 1

You can do:

{{ (fields | filter : {fieldName:"street"} : true)[0].fieldLabel}}

(fields | filter : {fieldName:"street"} : true) , [0] fieldLabel .

angular.module('app', []).controller('ctrl', function($scope) {
  $scope.fields = [{
    fieldName: 'houseNum',
    fieldLabel: 'House Number',
    disabled: false
  }, {
    fieldName: 'street',
    fieldLabel: 'Street',
    disabled: false
  }, {
    fieldName: 'city',
    fieldLabel: 'City',
    disabled: true
  }, {
    fieldName: 'state',
    fieldLabel: 'State',
    disabled: true
  }, ]
})

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app" ng-controller="ctrl">
  {{ (fields | filter : {fieldName:"street"} : true)[0].fieldLabel}}
</div>

Hide result

, .

function getFieldByName(prop){
     var field = {};
     //Or just use a for loop and break once you find a match
     $scope.fields.some(function(itm){
         if(itm.fieldName === prop){
            field = itm;
            return true;
         }
     });
     //Or you could inject $filter as well an do as below
     //return $filter('filter')($scope.fields,{fieldName:"street"})[0] || {}
     return field;
}

//Somewhere
$scope.streetField = getFieldByName('street');

:

{{streetField.fieldLabel}}

Array.some