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POAngularJS and complex JSON returned by django tastypie
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copied!<p>I have few resources written on AngularJS that access a Tastypie API. Everything works fine, except for a detail: tastypie always encapsulate the actual result inside a <code>objects</code> attribute on a JSON, example:</p> <p><code>/api/v1/reminder/</code>:</p> <pre><code>{ meta: { limit: 20, next: null, offset: 0, previous: null, total_count: 3 }, objects: [{ category: { color: "#999999", id: 1, name: "Groceries", resource_uri: "/api/v1/category/1" }, description: "", due_date: "2010-10-16", id: 1, repeat: "weekly", resource_uri: "/api/v1/reminder/1", value: "-50" }, { category: { color: "#999999", id: 1, name: "Groceries", resource_uri: "/api/v1/category/1" }, description: "", due_date: "2010-10-17", id: 2, repeat: "weekly", resource_uri: "/api/v1/reminder/2", value: "-50" } } </code></pre> <p>It was wasy to fix using a callback to the <code>get()</code> call:</p> <pre><code>Reminder.get().$then(function (result) { $scope.reminders = result.data.objects; }); </code></pre> <p>But I know <code>result.resource</code> is an actual <code>Reminder</code> instance.</p> <pre><code>.factory('Reminder', ['$resource', function($resource){ var Reminder = $resource('/api/v1/reminder/:id', {}, { get: { method: 'GET', isArray: false } }); Reminder.prototype.TESTE = function () {console.log('asd');}; return Reminder; }]) </code></pre> <p>Now I need to implement behavior on my <code>Reminder</code> class, and I need every element on my <code>meta.objects</code> to be an instance of <code>Reminder</code>:</p> <pre><code>Reminder.get().$then(function (result) { $scope.reminders = result.data.objects; result.resource.TESTE(); // -> outputs 'asd' o = result.data.objects[0]; o.TESTE // -> undefined, obvisously i = new Reminder(o); i.TESTE() // -> outputs 'asd' }); </code></pre> <p>So, how to I get angularjs to understand that every object on <code>objects</code> is the actual result so it behaves like a list of instances?</p> <p>The workaround is to creating a new list iterating on the results creating the instances, but it's not optimal...</p> <p>Suggestions?</p> <h1>Solution by @rtcherry:</h1> <p>As suggested by rtcherry, I used <a href="https://github.com/mgonto/restangular" rel="noreferrer">restangular</a></p> <p>Configuring the reading of request data:</p> <pre><code>.config(['RestangularProvider', function(RestangularProvider) { RestangularProvider.setBaseUrl("/api/v1"); RestangularProvider.setResponseExtractor(function(response, operation, what, url) { var newResponse; if (operation === "getList") { newResponse = response.objects; newResponse.metadata = response.meta; } else { newResponse = response.data; } return newResponse; }); }]) </code></pre> <p>Loading the reminders:</p> <pre><code>function RemindersCtrl ($scope, $rootScope, Reminder) { $scope.reminders = Reminder.getList(); } </code></pre> <p>Adding my custom method to <code>Reminder</code> (not as clean as ngResource, but doable):</p> <pre><code>.factory('Reminder', ['Restangular', '$filter', function(Restangular, $filter){ var Reminder = Restangular.all('reminder'); var remainingDays = function () { //do stuff }; // adding custom behavior Restangular.addElementTransformer('reminder', false, function (reminder) { reminder.remainingDays = remainingDays; return reminder; }); return Reminder; }]) </code></pre> <h1>Solution by @moderndegree:</h1> <p>I used pure <code>ngResource</code>:</p> <pre><code>var tastypieDataTransformer = function ($http) { return $http.defaults.transformResponse.concat([ function (data, headersGetter) { var result = data.objects; result.meta = data.meta; return result; } ]) }; ... .factory('Reminder', ['$resource', '$http', function($resource, $http){ var Reminder = $resource('/api/v1/reminder/:id', {}, { query: { method: 'GET', isArray: true, transformResponse: tastypieDataTransformer($http) } }); Reminder.prototype.remainingDays = function () { // doing stuff }; return Reminder; }]) </code></pre> <p>My controller:</p> <pre><code>Transaction.query(filter).$then(function (result) { $scope.days = []; var transactions = result.resource; resource[0].remainingDays(); // it works }); </code></pre>

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