How to compare elements in $scope?

Question

Angular

Good afternoon. So we have a form with the fields name, email, password. They are stored (or contained, not sure how exactly) by the newUser model. it looks something like this:

<input type="text" class="form-control" id="regUserName" name="regUserName" placeholder="Ваше имя" ng-model="newUser.name" required/>
<input type="email" class="form-control" id="regUserEmail" name="regUserEmail" placeholder="Email" ng-model="newUser.email" required/>
<input type="password" class="form-control" id="regUserPassword" name="regUserPassword" placeholder="Пароль" ng-model="newUser.password" required/>
<button style="float:right;" class="btn btn-primary" name="signUp" ng-disabled="regForm.$invalid || ConfirmPass(newUser)" ng-click="SignUp(newUser)">Поехали!</button>

When submitting the form, we run the SignUp() function. It contains the following:

$scope.SignUp = function(newUser){
    $http.get('php_scripts/check_user.php').success(function(data){
      $scope.dbInfo = data;
    });

Our php script works and all data from dbInfo can be displayed via ng-repeat
(by the way, in data we get data in the form [{"email":"[email protected]"},{"email":"[email protected] ua"}]they are entered in dbInfo.)
So the question is - I need to compare the email from the form (that is, newUser.email) with those stored in dbInfo.
Thanks in advance!

Answer 1

I solved the problem a little differently: indeed, if you try to read the elements from the received JSON as $scope.dbInfo[i], then it will give an error. That is the condition

if(newUser.email==$scope.dbInfo[i]){
-----
}

won't work. To fix it, just add a prefix of the elements received in JSON. In my case, the JSON was: [{"email":"[email protected]"},{"email":"[email protected]"}]
So the correct condition would be with the addition of the email prefix:

if(newUser.email==$scope.dbInfo[i].email){
-----
}

Answer 2

we have one object, we have another object .... we compare using js.

Answer 3

If you don't want everything by hand, you can use Underscore/Lodash:
'emaiIsExist' will be undefined if there is no object in the array of objects that has the given field with the given value. Otherwise - will contain the first matching object from the array.