I am getting the famous Unknown provider error with my node app and can't figure out why.
app.js
var app = angular.module('citigraph', ['addCtrl', 'mygservice', 'stationservice']);
addCtrl.js
var addCtrl = angular.module('addCtrl', ['mygservice', 'rzModule', 'chart.js', 'stationservice']);
addCtrl.controller('addCtrl', function($scope, $http, $rootScope, gservice, stationservice){ ... }
stationservice.js
angular.module('stationservice', []).service('mystationservice', function($http){ ... }
The error in detail:
Error: [$injector:unpr] Unknown provider: stationserviceProvider <-
stationservice <- addCtrl
It looks like you are not using modules correctly. Use a single module name and reuse that module. You can retrieve it again by name if you omit the 2nd set of parameters.
You could create multiple modules but that is generally done when you want to group multiple items together as a piece of functionality.
app.js
// add common external dependencies to this module to the [] array
var app = angular.module('citigraph', []);
addCtrl.js
// add controller to same module
var app = angular.module('citigraph');
app.controller('addCtrl', ['$scope', '$http', '$rootScope', 'gservice', 'stationservice', function($scope, $http, $rootScope, gservice, stationservice){ ... }]
stationservice.js
// add service to same module
angular.module('citigraph').service('mystationservice', ['$http', function($http){ ... }]
Modify your code as below. I think there is some mix up here. Why do you need create two modules for application if they can be combined together.
app.js
var app = angular.module('citigraph', []);
addCtrl.js
var app = angular.module('addCtrl');
app.controller('addCtrl', function($scope, $http, $rootScope, gservice, stationservice){ ... }
stationservice.js
angular.module('citigraph').service('mystationservice', function($http){ ... }
Please refer Angular JS official documentation https://docs.angularjs.org/guide/di for more information.
Related
Similar to this question: How to create separate AngularJS controller files?
I have a module that has controllers in several files, including controllers that are linked to directives. Where can I declare a factory such that it can be injected into all of them easily?
For example, in app.js I define the app level module
var app = angular.module('myApp', ['ngRoute']);
I would then expect to be able to define a factory in app.js like
app.factory('myFactory', function() { return { myThing: myThing}; });
And then be able to inject it into a controller that looked like
angular.module('myApp')
.controller('Ctrl1', ['$scope', '$http', 'myFactory',
function ($scope, $http, myFactory) {}]);
But I get the error Error: [$injector:unpr] Unknown provider:
Is there a way to do this?
I was trying to get some angular code to work and it seems that i am not quite understanding some of the syntax.
var mainModule = angular.module('main', ['common']);
What is the importance of "main" is that specific to something?
What is "common"?
I DO reference the angular latest js and app.js in layout.cshtml
I do not get any errors in chrome console.
My index.cshtml looks like
<div data-ng-controller="indexViewModel">
<h1>{{ topic }}</h1>
here is my app.js
var mainModule = angular.module('main', ['common']);
mainModule.controller("indexViewModel", function (
$scope, $http, $q, $routeParams, $window, $location, viewModelHelper) {
var self = this;
$scope.topic = "Tasks";
$scope.author = "Tom";
console.log("test");
});
(function (myApp) {
var viewModelHelper = function (
$http, $q, $window, $location) {
var self = this;
return this;
};
myApp.viewModelHelper = viewModelHelper;
}(window.MyApp));
Update:
Yes, my body tag was missing ng-app
<body data-ng-app="main">
Now i get the error with angular 1.5.6
angular.js:68 Uncaught Error: [$injector:modulerr] Failed to instantiate module main due to:
Error: [$injector:modulerr] Failed to instantiate module common due to:
Error: [$injector:nomod] Module 'common' is not available! You either misspelled the module name or forgot to load it. If registering a module ensure that you specify the dependencies as the second argument.
Update 2:
OK , i see I NEEDED to have common defined since i called it that:
var commonModule = angular.module('common', ['ngRoute']);
var mainModule = angular.module('main', ['common']);
HOWEVER, getting this error now
angular.js:13642 Error: [$injector:unpr] Unknown provider: viewModelHelperProvider <- viewModelHelper <- indexViewModel
http://errors.angularjs.org/1.5.6/$injector/unpr?p0=viewModelHelperProvider%20%3C-%20viewModelHelper%20%3C-%20indexViewModel
at angular.js:68
Update 3 FIXED
I needed to add in this factory code
commonModule.factory('viewModelHelper',
function ($http, $q, $window, $location) {
return MyApp.viewModelHelper(
$http, $q, $window, $location);
});
The ng-app directive tells AngularJS that this is the root element of the AngularJS application.
You can only have one ng-app directive in your HTML document. If more than one ng-app directive appears, the first appearance will be used.
So, in angular.module('main', ['common']), main is the value of ng-app directive and common is the dependency on which your module main depends.
Take an example of routing, we inject the dependency ngRoute in the angular.module for routing of application.
Syntax : angular.module('main', ['ngRoute'])
Here, main is depends on ngRoute because without ngRoute module angular can not perform routing.
angular.module('main', ['common']) - main is the name of your module - you will later use it in HTML as the value of ng-app, and ['common'] is another module that your module depends on.
Make sure you defined ng-app="main" in your html. this is the first thing you need to define before you declare any controller
make sure you include angular.js as a script in your html (<script src="path/to/angular.js"></script>)?
I want to create seperate module for pagination, because I will need it to reuse in different modules, but I don't know how to call a function from module dependency (another module)
Here is my main module:
var App = angular.module('search', ['pagination']);
App.controller('MainController', ['$scope', '$pagination' function($scope, $pagination) {
$scope.testFunction(); //function from pagination module controller
}])
Here is my pagination module:
var App = angular.module('pagination', []);
App.controller('PaginationController', ['$scope', function($scope) {
$scope.testFunction = function(){
console.log("pagination module");
}
}])
I get error:
Error: [$injector:unpr] Unknown provider: $paginationProvider <- $pagination
To share resources across two modules, declare a factory or a service.
Suppose you have a search module:
//you inject your pagination module here
var searchModule = angular.module('search', ['pagination']);
//and you ALSO need to inject your pagination's service into your controller
searchModule.controller('MainController', ['$scope', 'paginationSvc' function($scope, paginationSvc) {
//function from pagination module controller
paginationSvc.testFunction();
}])
And your pagination module:
var pagination = angular.module('pagination', []);
//declare your pagination service here
pagination.factory('PaginationSvc', [function(){
return {
testFunction:testFunction
};
function testFunction(){
console.log('This is from pagination module');
}
}])
Maybe a little plnkr will help :D
You can't inject a controller in a controller. Your pagination module need to declare a service or factory or provider wich will be be injected in your controller.
See docs here.
You should create a pagination directive and insert that where you need it. You might get some good ideas from this post.
To begin with
angular.module('app', [
'ngCookies',
'ngResource',
'ngSanitize',
'ngRoute'
])
Here is my casual factory. Nothing really to see
angular.module('app')
.factory('myFactory', function () {
// Service logic
// ...
// Public API here
return {
isSaved: true
};
});
Here is a controller I use the service in. There is one more like this. They both follow the same pattern
angular.module('app')
.controller('AdvertisersCtrl', [ '$scope', '$location', 'myFactory', function ($scope, $location, myFactory) {
$scope.$emit('controllerChange', 2);
$scope.isFormSave = function () {
// Form Validation
myFactory.isSaved = true;
$location.path('/saved');
};
}]);
And last, but certainly not least. The error I am getting.
Error: [$injector:unpr] Unknown provider: myFactoryProvider <- myFactory
http://docs.angularjs.org/error/$injector/unpr?p0=myFactoryProvider
Also, this project was scaffolded with yoeman, and it uses ngmin.. and all the other packaged grunt tasks yoeman provides.
Thanks folks.
Do you create the module app ?
In the code snippets above both invocations of module() are supposed to retrieve instance of already existing module.
But you have to create it first.
angular.module('app', []) vs. angular.module('app')
more info: http://docs.angularjs.org/guide/module#creation-versus-retrieval
I'm using the angular-seed template to structure my application. Initially I put all my JavaScript code into a single file, main.js. This file contained my module declaration, controllers, directives, filters, and services. The application works fine like this, but I'm worried about scalability and maintainability as my application becomes more complex. I noticed that the angular-seed template has separate files for each of these, so I've attempted to distribute my code from the single main.js file into each of the other files mentioned in the title to this question and found in the app/js directory of the angular-seed template.
My question is: how do I manage the dependencies to get the application to work? The existing documentation found here isn't very clear in this regard since each of the examples given shows a single JavaScript source file.
An example of what I have is:
app.js
angular.module('myApp',
['myApp.filters',
'myApp.services',
'myApp.controllers']);
controllers.js
angular.module('myApp.controllers', []).
controller('AppCtrl', [function ($scope, $http, $filter, MyService) {
$scope.myService = MyService; // found in services.js
// other functions...
}
]);
filters.js
angular.module('myApp.filters', []).
filter('myFilter', [function (MyService) {
return function(value) {
if (MyService.data) { // test to ensure service is loaded
for (var i = 0; i < MyService.data.length; i++) {
// code to return appropriate value from MyService
}
}
}
}]
);
services.js
angular.module('myApp.services', []).
factory('MyService', function($http) {
var MyService = {};
$http.get('resources/data.json').success(function(response) {
MyService.data = response;
});
return MyService;
}
);
main.js
/* This is the single file I want to separate into the others */
var myApp = angular.module('myApp'), []);
myApp.factory('MyService', function($http) {
// same code as in services.js
}
myApp.filter('myFilter', function(MyService) {
// same code as in filters.js
}
function AppCtrl ($scope, $http, $filter, MyService) {
// same code as in app.js
}
How do I manage the dependencies?
The problem is caused from you "redeclaring" your application module in all your separate files.
This is what the app module declaration (not sure declaration is the right term) looks like:
angular.module('myApp', []).controller( //...
This is what assignment (not sure if assignment is the right term either) to your application module looks like:
angular.module('myApp').controller( //...
Notice the lack of square brackets.
So, the former version, one with the square brackets, should only be used once, usually in your app.js or main.js. All other associated files — controllers, directives, filters … — should use the latter version, the one without the square brackets.
I hope that makes sense. Cheers!
If you're wanting to put your different parts of your application (filters, services, controllers) in different physical files, there are two things you have to do:
Declare those namespaces (for lack of a better term) in your app.js or in each file;
Refer to those namespaces in each of the files.
So, your app.js would look like this:
angular.module('myApp', ['external-dependency-1', 'myApp.services', 'myApp.controllers'])
.run(function() {
//...
})
.config(function() {
//...
});
And in each individual file:
services.js
angular.module('myApp.services', []); //instantiates
angular.module('myApp.services') //gets
.factory('MyService', function() {
return {};
});
controllers.js
angular.module('myApp.controllers', []); //instantiates
angular.module('myApp.controllers') //gets
.controller('MyCtrl', function($scope) {
//snip...
})
.controller('AccountCtrl', function($scope) {
//snip...
});
All of this can be combined into one call:
controllers.js
angular.module('myApp.controllers', [])
.controller('MyCtrl', function($scope) {
//snip...
});
The important part is that you shouldn't redefine angular.module('myApp'); that would cause it to be overwritten when you instantiate your controllers, probably not what you want.
You get the error because you didn't define myApp.services yet. What I did so far is putting all the initial definitions in one file and then use them in another. Like for your example I would put in:
app.js
angular.module('myApp.services', []);
angular.module('myApp',
['myApp.services',
...]);
That should get rid of the error, though I think you should have a read on the article Eduard Gamonal mentioned in one of the comments.