Angular service containing http get call not working with ng-repeat

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情深已故
情深已故 2021-01-21 17:22

I have an angular controller that calls a service. The service is responsible for returning data from a json file.

controller:

function projectController         


        
4条回答
  •  迷失自我
    2021-01-21 17:53

    $http is asynchronous, therefore the call to getProjects will return nothing. Using $q you can receive an instance to a promise which will receive the data when available.

    Using $q

    Here an example using $q: http://plnkr.co/edit/U72oJblvrVEgYt2mTmU2?p=preview

    Using $resource

    Alternatively, you can use $resource especially if your server code is RESTful, which requires adding the following dependency in your scripts: //ajax.googleapis.com/ajax/libs/angularjs/1.1.4/angular-resource.js

    This is a 1st review of your code to use $resource: http://plnkr.co/edit/tLOAaXZHdGgWOok3Sdc8?p=preview

    But you can simplify and shrink it more to this: http://plnkr.co/edit/pKO6k6GxJ1RlO8SNvqUo?p=preview

    This is the new app.js file:

    angular.module('app',  ['ngResource'])
      .factory('ProjectsService', ['$resource', function($resource) {
        return $resource('projects.json');
      }])
      .controller('ProjectsController', ['ProjectsService', '$scope', function(ProjectsService, $scope) {
        $scope.projects = ProjectsService.query();
      }]);
    

    Find more information about $resource here: http://docs.angularjs.org/api/ngResource.$resource

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