Angularjs Init Model From Default Value

Problem description: I have a form that has values loaded from server. How do I initialize ng-model?

Best Practice

Never pull data from server directly, use a service to do it:

app.controller('myCtrl', function($scope, myService) {
    $scope.email = myService.getEmail();
});
<input type="text" ng-model="email" />

Use ng-init

If you absolutely MUST render your values into your HTML from your server, you can use ng-init:

<input type="text" ng-model="email" ng-init="email='test@test.com'" />

But if you want to use this email to pull the user data from server in controller:

app.controller('myCtrl', function($scope,userService) {
    $scope.user = userService.getEmail($scope.email);
});

You will find the email variable is undefined. This is because in the compile phase, the controller gets created first and then ng-init is set. So you should use $watch to observe changes in the email variable:

app.controller('myCtrl', function($scope,userService) {
    $scope.$watch("email", function(){
        $scope.user = userService.getEmail($scope.email);
    });
});