javascript - AngularJS + MEANJS - Use object model property as array key for filter -


i have meanjs app crud module of countries. when click on country default list view, brings me view-country.client.view. have added field model currencycode. when click country bring me page want bring exchange rate json matching currencycode field of country model data json import. 

//view-country.client.view  <section data-ng-controller="countriescontroller" data-ng-init="findrate()">  <div class="col-lg-3 col-md-6 col-sm-12">     <div class="panel panel-dark">         <div class="panel-heading">currency</div>         <div class="panel-body">         {{country.currencycode}}             <p>the exchange rate {{exchangerates.rates['afn']}}             </div>          </div>    </div> </section>      //findrate() data-ng-init in countriescontroller  $scope.findrate = function() {              $scope.country = countries.get({                      countryid: $stateparams.countryid                 });              $http.get('http://localhost:3000/rates.json').             success(function(data) {                 $scope.exchangerates = data                     });         };

everything working json import , if include countrycode (in example 'afn' afghanistan), return correct rate. {{country.currencycode}} brings afn mongodb if try , embed {{country.currencycode}} 'afn' is, not work. have tried looking @ filters cannot work. basically, anytime click country, want show rate country using model property string getting correct object array. have been in forums day , cannot figure out. thank in advance.

if understood correct, don't want 'afg' hardcoded here? 

{{exchangerates.rates['afn']}}

if that's case have tried this? 

{{exchangerates.rates[country.currencycode]}}

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