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angularjs - Using the same controller on different elements to refer to the same object

I figured if I slapped ng-controller="GeneralInfoCtrl" on multiple elements in my DOM they would share the same $scope (or least two-way binding isn't working).

The reason I want to do this is because I have different read-only views with associated modal dialogs in very different parts of the HTML and they don't share a common ancestor (aside from <body> and <html>).

Is there a way to make both controllers refer to the same object/make data binding work between them?


Here's some code for those who insist on seeing markup, written in Jade:

   .client-box(ng-controller="GeneralInfoCtrl")
        .box-header
            .box-title
                h5 General Information
            .box-buttons
                button.btn.btn-small(data-target='#editGeneralInfo', data-toggle='modal', data-backdrop='static') <i class="icon-pencil"></i> Edit
        .box-body
            table.table.table-tight.table-key-value
                tr
                    th Name
                    td {{client.fullName()}}
                tr
                    th Also Known As
                    td {{client.aka}}
                tr
                    th Birth Date
                    td {{client.birthDate|date:'mediumDate'}}
    ...

#editGeneralInfo.modal.hide.fade(ng-controller="GeneralInfoCtrl")
    .modal-header
        button.close(type='button', data-dismiss='modal') &times;
        h3 Edit General Information
    .modal-body
        form.form-horizontal.form-condensed
            .control-group
                label.control-label First Name
                .controls
                    input(type='text', placeholder='First Name', ng-model='client.firstName')
            .control-group
                label.control-label Last Name
                .controls
                    input(type='text', placeholder='Last Name', ng-model='client.lastName')
            .control-group
                label.control-label Also Known As
                .controls
                    input(type='text', placeholder='AKA', ng-model='client.aka')
            .control-group
                label.control-label Birth Date
                .controls
                    input(type='text', placeholder='MM/DD/YYYY', ng-model='client.birthDate')
...

And my controller:

function GeneralInfoCtrl($scope) {
    $scope.client = {
        firstName: 'Charlie',
        lastName: 'Brown',
        birthDate: new Date(2009, 12, 15),
        ...
    }
}
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1 Answer

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Each time the Angular compiler finds ng-controller in the HTML, a new scope is created. (If you use ng-view, each time you go to a different route, a new scope is created too.)

If you need to share data between controllers, normally a service is your best option. Put the shared data into the service, and inject the service into the controller:

function GeneralInfoCtrl($scope, MyService) {

Each scope/controller instance will then be able to access the shared data.

Note that services are singletons, so there will only be one instance of your shared data around.

Here is a fiddle (I didn't write it) showing how two controllers can share data.

See also AngularJS: How can I pass variables between controllers? and
Angularjs: two way data bindings and controller reload.


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