angular js $http.get returns object object - angularjs

I am trying to retrieve some sample values from mysql database and display it to my view using angularjs. I am pretty new to angular and I am trying to use $http.get to get my data. The following is my code
Angular Code
angular
.module('sampleApp.service.product', [])
.factory('productsService', [
'$http',
function ($http) {
return {
getProducts: function () {
// return $http.get("/Home/GetTweets");
return $http({
method: 'GET',
url: '/api/Products'
}).success(function (data) {
alert("success");
alert(data);
}).error(function (error) {
//Showing error message
alert("failed");
$scope.status = 'Unable to retrieve products' + error.message;
});
alert(data) returns [object,Object]
My Controller code has the following
public class productsController : ApiController
{
public IEnumerable<Product> Get()
{
ProductEntities context = new ProductEntities();
var _products = from p in context.Products.AsEnumerable() select p;
return _products;
}
}
On debug I am getting the values in DB int the _products. Please help me out.Thanks In advance!
enter code here

your code is successful as i can see
put console.log(data); instead of alert(data); and then you can see the data in the browser console.
.factory('productsService', [ '$http','$q', function ($http,$q) {
return {
getProducts: function () {
var deferred = $q.defer();
$http({
method: 'GET',
url: '/api/Products'
}).success(function (data) {
deferred.resolve(data);
}).error(function (error) {
deferred.reject(data);
});
return deferred.promise;
}
}
In the Conteroller,
productsService.getProducts().then(function(data) {
//success
$scope.products = data.rows;
console.log($scope.products);
}, function() {
//flier
});

Related

Angularjs $http then is not working properly

I get a value of "True" in my response. How come my debugger and alert and AccessGranted() in the .then of my $http is not being invoked. Below is my Script:
app.controller("LoginController", function($scope, $http) {
$scope.btnText = "Enter";
$scope.message = "";
$scope.login = function() {
$scope.btnText = "Please wait...";
$scope.message = "We're logging you in.";
$http({
method: 'post',
url: '/Login/Login',
data: $scope.LoginUser
}).then(function (response) {
debugger;
alert(response.data);
if (response.data == "True") {
AccessGranted();
} else {
$scope.message = response.data;
$scope.btnText = "Enter";
}
},
function (error) {
$scope.message = 'Sending error: ' + error;
});
}
$scope.AccessGranted = function() {
window.location.pathname("/Home/HomeIndex");
}
});
This is in my HomeController
public ActionResult HomeIndex()
{
var am = new AuditManager();
var auditModel = new AuditModel()
{
AccountId = 0,
ActionDateTime = DateTime.Now,
ActionName = "Home",
ActionResult = "Redirected to Home"
};
am.InsertAudit(auditModel);
return View("Index");
}
Please see image for the response I get.
seems like your approach is wrong
$http({
method: 'GET',
url: '/someUrl'
}).then(function successCallback(response) {
// this callback will be called asynchronously
// when the response is available
}, function errorCallback(response) {
// called asynchronously if an error occurs
// or server returns response with an error status.
});
Try this,
$http({
method: 'post',
url: '/Login/Login',
data: $scope.LoginUser
})
.then(function (response) {
console.log(response);
},
function (error) {
console.log(error);
});
And check your browser console for logs or any errors
Make sure the response is application/json content type, and content is json.
You can also write own httpProvider for check result from server
module.config(['$httpProvider', function ($httpProvider) {
...
I would suggest you to code like this instead of then so whenever there is success, The success part will be invoked.
$http.get('/path/').success(function (data) {
$scope.yourdata = data.data;
//console.log($scope.yourdata);
}).error(function (error){
//error part
});

Getting ModelAndView data in angular js controller

I am trying to get the model data in angular js ,but not able to get it . I printed the value on spring mvc side .The data is getting stored and is retrieved successfully with the given key.Can anyone tell me how can I achieve this .
My controller-
#RequestMapping(value = "/home.web", method = RequestMethod.GET, produces = {
"application/json" })
public ModelAndView getUSCity(#RequestParam ("statechoice") String statechoice) {
List<String> msa = new ArrayList<String>();
msa = msaService.getMsaCodes(statechoice);
/*ModelAndView model = new ModelAndView("Home");
model.addObject("cities",msa);
System.out.println(model.getModel().get("cities"));*/
//return msa;
return new ModelAndView("Home", "cities",msa);
}
My angular js -
function MyController($scope, $http) {
$scope.getPersonData = function() {
$http({
method : 'GET',
url : 'home.web'
}).success(function(data, status, headers, config) {
alert(data);
$scope.cities = data;
}).error(function(data, status, headers, config) {
console.log("error");
// called asynchronously if an error occurs
// or server returns response with an error status.
});
};
};
Split your code into controller and service because you should not do api calls from cotroller directly(best case). Services should be used. Controllers are only be used to controlling model to show it in the view.
myService.js
app.service('myService', ['$http', '$q', function($http, $q){
return {
getPersons: function(obj) {
var deferred = $q.defer();
$http({
method : obj.method,
url : obj.url
}).then(function(response) {
deferred.resolve(response);
}, function(error) {
alert(error);
deferred.reject(error);
// called asynchronously if an error occurs
// or server returns response with an error status.
});
return deferred.promise();
};
}
});
myController.js
function MyController('MyController', ['$scope', 'myService', function($scope, myService){
$scope.persons = [];
var obj = {method: 'GET', url: 'home.web'};
myService.getPersons(obj).then(function(response){
$scope.persons = response.data // or $scope.persons = response check yourself
}, function(error){
alert(error);
})
}]);

How to do error handling when fetching data in angularjs service

This code fetches categories and give them to controller.
sampleApp.factory('SCService', function($http, $q) {
var SuperCategories = [];
var SCService = {};
SCService.GetSuperCategories = function() {
var req = {
method: 'POST',
url: SuperCategoryURL,
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
data: "action=GET"
};
if ( SuperCategories.length == 0 ) {
return $http(req).then(function (response) {
SuperCategories = response.data;
return SuperCategories;
});
}else {
return $q.when(SuperCategories);
}
}
return SCService;
});
I think code is perfect until there is no error in http request.
My query is how to do error handling (try catch or something like that), in case if server have some issue or may be cgi-script have some issue and not able to server the request.
Angular promises use a method catch for that.
return $http(req).then(function (response) {
SuperCategories = response.data;
return SuperCategories;
}).catch(function(error) {
// Do what you want here
});
You should use also finally :
return $http(req).then(function (response) {
SuperCategories = response.data;
return SuperCategories;
}).catch(function(error) {
// Do what you want here
}).finally(function() {
// Always executed. Clean up variables, call a callback, etc...
});
Write like
return $http(req).then(function (response) {
//success callback
},
function(){
//Failure callback
});
Use callback methods from controller Like
Controller.js
service.GetSuperCategories(function (data) {console.log('success'},function (error){console.log('error'});
service.js
sampleApp.factory('SCService', function($http, $q) {
var SuperCategories = [];
var SCService = {};
SCService.GetSuperCategories = function(successMethod,errorMethod) {
var req = {
method: 'POST',
url: SuperCategoryURL,
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
data: "action=GET"
};
return $http(req).then(successMethod(data),
errorMethod(error));
}
return SCService;
});
You can use the .success and .error methods of $http service, as below
$http(req).success(function(data, status, headers){
// success callback: Enters if status = 200
}).error(function(status, headers){
// error callback: enters otherwise
});

How to provide delay in ng-controller

As soon as Html page gets loaded, it calls SuperCategoryController, where i am assigning supercategories to $scope variable.
$scope.SuperCategories = SuperCategoryService.GetSuperCategories();
But as this controller is depends on service, which in turn calls the http request. so at the time pf assignment http request is not completed. so $scope.SuperCategories is getting assiged to undefined.
sampleApp.service('SuperCategoryService', ['$http', function ($http){
var URL = 'http://localhost/cgi-bin/superCategory.pl';
var SuperCategories;
$http({
method: 'POST',
url: URL,
data: "action=GET",
headers: {'Content-Type': 'application/x-www-form-urlencoded'}
}).
success(function (data) {
alert (data);
if (data != null || data != 'undefined') {
SuperCategories = data;
}
})
.error(function (error) {
alert (error.message);
//$scope.status = 'Unable to retrieve super categories' + error.message;
});
//simply returns the SuperCategories list
this.GetSuperCategories = function () {
//alert (SuperCategories);
return SuperCategories;
}
}]);
sampleApp.controller('SuperCategoryController', ['$scope', 'SuperCategoryService', function ($scope, SuperCategoryService){
$scope.SuperCategories = SuperCategoryService.GetSuperCategories();
$scope.LoadSuperCategoryMapping = function()
{
alert ($scope.SelectedSuperCategory.id);
}
}]);
How to solve this problem in proper way.
I haven't tried this code myself but I would approach a solution using factory and a promise to make sure the data has been loaded. Something along these lines:
sampleApp.factory('SuperCategoryService', ['$http', function ($http){
return {
GetSuperCategories: function () {
var URL = 'http://localhost/cgi-bin/superCategory.pl';
return $http.get(URL);
}
}
}]);
sampleApp.controller('SuperCategoryController', ['$scope', 'SuperCategoryService', function ($scope, SuperCategoryService){
$scope.SuperCategories = function() {
SuperCategoryService.GetSuperCategories()
.then(function(d) {
if (d.data != undefined) {
// Your data should be loaded here
console.log(d.data);
$scope.SuperCategories = d.data;
}
})
.error(function(data, status) {
// Errors here
});
}
}]);

deferred.resolve giving error TypeError: undefined is not a function

I am using angularjs and cordova tool for creating application.
I have created service, which contains code for calling APIs. and in that I want to return response to my angular controller.
My code is,
Service,
JodoModule.factory('commonServices', function ($http, $q, $rootScope) {
return {
getServiceData: function (url) {
$rootScope.loading = true;
var deferred = $q.defer();
var req = {
method: 'GET',
url: url
}
$http(req).success(function (data) {
alert("data in service = " + JSON.stringify(data.Data));
deferred.resolve(data);
}).error(function (data, status, headers, config) {
deferred.reject(status);
});
return deferred.promise;
}
};
});
My controller is,
commonServices.getServiceData("My url").
success(function (data, status, headers, config) {
alert(data);
}).
error(function (data, status, headers, config) {
alert("Got error");
});
In above code, in service, its showing elert message for JSON.stringify(data.Data)); in success block, so data is comming, but its not executing deferred.resolve(data); properly...
in Web tool bar its giving me error,
ie. TypeError: undefined is not a function
My o/p is :
{"status":"SUCCESS","Message":"success","Token":"","Data":[{"Id":17,"UserId":"477f1919-6b80-4804-a325-ac0cb05bcd3e","UserName":"honey","FirstName":"honey","LastName":null,"ProfilePic":false,"Status":2}]}
How can I solve this error. ?
Ordinary $q promises don't have a .success() or .error() method, but you shouldn't be using the deferred antipattern anyway. Instead, do this:
JodoModule.factory('commonServices', function ($http, $rootScope) {
return {
getServiceData: function (url) {
$rootScope.loading = true;
var req = {
method: 'GET',
url: url
};
return $http(req).then(function (result) {
alert("data in service = " + JSON.stringify(result.data.Data));
return result.data;
});
}
};
});
Controller:
commonServices.getServiceData("My url").
then(function (data) {
alert(data);
}).
catch(function (result) {
alert("Got error");
});
Quite a bit cleaner, ay?

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