Angular ui-router get asynchronous data with resol

问题:

I want to display a form with data corresponding to the edited item. I use ui-router for routing. I defined a state:

myapp.config(function($stateProvider) {

    $stateProvider.
    .state('layout.propertyedit', {
        url: "/properties/:propertyId",
        views : {
            "contentView@": {
                templateUrl : 'partials/content2.html', 
                controller: 'PropertyController'
            }
        }
    });

In PropertyController, I want to set $scope.property with data coming from the following call (Google Cloud Endpoints):

    gapi.client.realestate.get(propertyId).execute(function(resp) {
        console.log(resp);
    });

I don't know if I can use resolve because the data are returned asynchronously. I tried

    resolve: {
        propertyData: function() {
            return gapi.client.realestate.get(propertyId).execute(function(resp) {
                console.log(resp);
            });
        }
    }

First issue, the propertyId is undefined. How do you get the propertyId from the url: "/properties/:propertyId"?

Basically I want to set $scope.property in PropertyController to the resp object returned by the async call.

EDIT:

myapp.controller('PropertyController', function($scope, , $stateParams, $q) {

    $scope.property = {};

    $scope.create = function(property) {
    }

    $scope.update = function(property) {
    }

function loadData() {
    var deferred = $q.defer();

    gapi.client.realestate.get({'id': '11'}).execute(function(resp) {
        deferred.resolve(resp);
    });

    $scope.property = deferred.promise;
}

});

回答1:

You need to read the docs for resolve. Resolve functions are injectable, and you can use $stateParams to get the correct value from your routes, like so:

resolve: {
    propertyData: function($stateParams, $q) {
        // The gapi.client.realestate object should really be wrapped in an
        // injectable service for testability...

        var deferred = $q.defer();

        gapi.client.realestate.get($stateParams.propertyId).execute(function(r) {
            deferred.resolve(r);
        });
        return deferred.promise;
    }
}

Finally, the values for resolve functions are injectable in your controller once resolved:

myapp.controller('PropertyController', function($scope, propertyData) {

    $scope.property = propertyData;

});

回答2:

I think your controller function needs $stateParams parameter from which you can get your propertyId. Then you can use $q parameter and create promise to set $scope.property with something like this:

var deferred = $q.defer();

gapi.client.realestate.get(propertyId).execute(function(resp) {
    deferred.resolve(resp);
});

$scope.property=deferred.promise;

Here is description of using promises for handling async calls.

回答3:

Try this easy way to use resolve in proper way

State code:

---

.state('yourstate', {
                url: '/demo/action/:id',
                templateUrl: './view/demo.html',
                resolve:{
                    actionData: function(actionData, $q, $stateParams, $http){
                       return actionData.actionDataJson($stateParams.id);
                    }
                },
                controller: "DemoController",
                controllerAs : "DemoCtrl"
            })

---

In the above code I am sending parameter data which I am sending in the url,For examples if i send like this /demo/action/5 this number 5 will go to actionData service that service retrieve some json data based on id.Finally that data will store into actionData You can use that in your controller directly by using that name

Following code return some JSON data based on id which iam passing at state level

---

(function retriveDemoJsonData(){

    angular.module('yourModuleName').factory('actionData', function ($q, $http) {

        var data={};
        data.actionDataJson = function(id){
           //The original business logic will apply based on URL Param ID 
            var defObj = $q.defer();
            $http.get('demodata.json')
                .then(function(res){
                     defObj.resolve(res.data[0]);
                });
            return defObj.promise;  
        }
        return data;
    });

})();

---

回答4:

How about this:

function PropertyController($scope, $stateParams) {
   gapi.client.realestate.get($stateParams.propertyId).execute(function(resp) {
     $scope.property = resp;
   });
}