Multiple controllers with AngularJS in single page app

Question

What is the problem? To use multiple controllers, just use multiple ngController directives:

<div class="widget" ng-controller="widgetController">
    <p>Stuff here</p>
</div>

<div class="menu" ng-controller="menuController">
    <p>Other stuff here</p>
</div>

You will need to have the controllers available in your application module, as usual.

The most basic way to do it could be as simple as declaring the controller functions like this:

function widgetController($scope) {
   // stuff here
}

function menuController($scope) {
   // stuff here
}

I think you are missing the "single page app" meaning.

That doesn't mean you will physically have one .html, instead you will have one main index.html and several NESTED .html file. So why single page app? Because this way you do not load pages the standard way (i.e. browser call that completely refreshes the full page) but you just load the content part using Angular/Ajax. Since you do not see the flickering between page changes, you have the impression that you didn't move from the page. Thus, you feel like you are staying on a single page.

Now, I'm assuming that you want to have MULTIPLE contents for your SINGLE PAGE app: (e.g.) home, contacts, portfolio and store. Your single page/multiple content app (the angular way) will be organized this way:

• index.html: contains header, <ng-view> and footer
• contacts.html:contains the contact form (no header, no footer)
• portfolio.html:contains the portfolio data (no header no footer)
• store.html: contains the store, no header no footer.

You are in index, you click on the menu called "contacts" and what happens? Angular replaces the <ng-view> tag with the contacts.html code

How do you achieve that? with ngRoute, as you are doing, you will have something like:

app.config(function($routeProvider, $locationProvider) {                        
  $routeProvider                                                                
       .when('/', {                                            
         templateUrl: "templates/index.html",                                               
         controller:'MainCtrl',                                
        })
        .when('/contacts', {                                            
         templateUrl: "templates/contacts.html",                                               
         controller:'ContactsCtrl',                                
        })                                                                 
        .otherwise({                      
            template: 'does not exists'   
        });      
});

This will call the right html passing the right controller to it (please note: do not specify ng-controller directive in contacts.html if you are using routes)

Then, of course, you can declare as many ng-controller directives inside your contacts.html page. Those will be child controllers of ContactCtrl (thus inheriting from it). But for a single route, inside the routeProvider, you can declare a single Controller that will act as the "Father controller of the partial view".

EDIT Imagine the following templates/contacts.html

<div>
    <h3>Contacts</h3>
    <p>This is contacts page...</p>
</div>

the above routeProvider will inject a controller into your containing div. Basically the above html automaticaly becomes:

<div ng-controller="ContactsCtrl">
    <h3>Contacts</h3>
    <p>This is contacts page...</p>
</div>

When I say you can have others controllers, means that you can plug controllers to inner DOM elements, as the following:

<div>
    <h3>Contacts</h3>
    <p ng-controller="anotherCtrl">Hello {{name}}! This is contacts page...     
    </p>
</div>

I hope this clarify things a bit.

A

I'm currently in the process of building a single page application. Here is what I have thus far that I believe would be answering your question. I have a base template (base.html) that has a div with the ng-view directive in it. This directive tells angular where to put the new content in. Note that I'm new to angularjs myself so I by no means am saying this is the best way to do it.

app = angular.module('myApp', []);                                                                             

app.config(function($routeProvider, $locationProvider) {                        
  $routeProvider                                                                
       .when('/home/', {                                            
         templateUrl: "templates/home.html",                                               
         controller:'homeController',                                
        })                                                                      
        .when('/about/', {                                       
            templateUrl: "templates/about.html",     
            controller: 'aboutController',  
        }) 
        .otherwise({                      
            template: 'does not exists'   
        });      
});

app.controller('homeController', [              
    '$scope',                              
    function homeController($scope,) {        
        $scope.message = 'HOME PAGE';                  
    }                                                
]);                                                  

app.controller('aboutController', [                  
    '$scope',                               
    function aboutController($scope) {        
        $scope.about = 'WE LOVE CODE';                       
    }                                                
]); 

base.html

<html>
<body>

    <div id="sideMenu">
        <!-- MENU CONTENT -->
    </div>

    <div id="content" ng-view="">
        <!-- Angular view would show here -->
    </div>

<body>
</html>

<div class="widget" ng-controller="widgetController">
    <p>Stuff here</p>
</div>

<div class="menu" ng-controller="menuController">
    <p>Other stuff here</p>
</div>
///////////////// OR ////////////


  <div class="widget" ng-controller="widgetController">
    <p>Stuff here</p>
    <div class="menu" ng-controller="menuController">
        <p>Other stuff here</p>
    </div>
</div>

menuController have access for menu div. And widgetController have access to both.

We can simply declare more than one Controller in the same module. Here's an example:

  <!DOCTYPE html>
    <html>

    <head>
       <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js">
       </script>
      <title> New Page </title>


    </head> 
    <body ng-app="mainApp"> <!-- if we remove ng-app the add book button [show/hide] will has no effect --> 
      <h2> Books </h2>

    <!-- <input type="checkbox" ng-model="hideShow" ng-init="hideShow = false"></input> -->
    <input type = "button" value = "Add Book"ng-click="hideShow=(hideShow ? false : true)"> </input>
     <div ng-app = "mainApp" ng-controller = "bookController" ng-if="hideShow">
             Enter book name: <input type = "text" ng-model = "book.name"><br>
             Enter book category: <input type = "text" ng-model = "book.category"><br>
             Enter book price: <input type = "text" ng-model = "book.price"><br>
             Enter book author: <input type = "text" ng-model = "book.author"><br>


             You are entering book: {{book.bookDetails()}}
     </div>

    <script>
             var mainApp = angular.module("mainApp", []);

             mainApp.controller('bookController', function($scope) {
                $scope.book = {
                   name: "",
                   category: "",
                   price:"",
                   author: "",


                   bookDetails: function() {
                      var bookObject;
                      bookObject = $scope.book;
                      return "Book name: " + bookObject.name +  '\n' + "Book category: " + bookObject.category + "  \n" + "Book price: " + bookObject.price + "  \n" + "Book Author: " + bookObject.author;
                   }

                };
             });
    </script>

    <h2> Albums </h2>
    <input type = "button" value = "Add Album"ng-click="hideShow2=(hideShow2 ? false : true)"> </input>
     <div ng-app = "mainApp" ng-controller = "albumController" ng-if="hideShow2">
             Enter Album name: <input type = "text" ng-model = "album.name"><br>
             Enter Album category: <input type = "text" ng-model = "album.category"><br>
             Enter Album price: <input type = "text" ng-model = "album.price"><br>
             Enter Album singer: <input type = "text" ng-model = "album.singer"><br>


             You are entering Album: {{album.albumDetails()}}
     </div>

    <script>
             //no need to declare this again ;)
             //var mainApp = angular.module("mainApp", []);

             mainApp.controller('albumController', function($scope) {
                $scope.album = {
                   name: "",
                   category: "",
                   price:"",
                   singer: "",

                   albumDetails: function() {
                      var albumObject;
                      albumObject = $scope.album;
                      return "Album name: " + albumObject.name +  '\n' + "album category: " + albumObject.category + "\n" + "Book price: " + albumObject.price + "\n" + "Album Singer: " + albumObject.singer;
                   }
                };
             });
    </script>

    </body>
    </html>

I just put one simple declaration of the app

var app = angular.module("app", ["xeditable"]);

Then I built one service and two controllers

For each controller I had a line in the JS

app.controller('EditableRowCtrl', function ($scope, CRUD_OperService) {

And in the HTML I declared the app scope in a surrounding div

<div ng-app="app">

and each controller scope separately in their own surrounding div (within the app div)

<div ng-controller="EditableRowCtrl">

This worked fine